/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-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:27:51,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:27:51,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:27:51,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:27:51,238 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 [2021-07-13 19:27:51,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:27:51,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:27:51,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:27:51,269 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:27:51,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:27:51,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:27:51,272 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:27:51,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:27:51,272 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:27:51,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:27:51,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:27:51,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:27:51,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:27:51,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:27:51,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:27:51,274 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:27:51,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:27:51,274 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:27:51,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:27:51,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:27:51,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:27:51,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:27:51,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:27:51,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:27:51,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:27:51,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:27:51,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:27:51,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:27:51,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:27:51,276 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:27:51,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:27:51,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:27:51,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:27:51,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:27:51,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:27:51,587 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:27:51,588 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:27:51,589 INFO L432 ainManager$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 [2021-07-13 19:27:51,589 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl' [2021-07-13 19:27:51,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:27:51,968 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:27:51,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:27:51,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:27:51,969 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:27:51,977 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 13.07 07:27:51" (1/1) ... [2021-07-13 19:27:51,984 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 13.07 07:27:51" (1/1) ... [2021-07-13 19:27:51,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:27:51,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:27:51,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:27:51,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:27:51,999 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 13.07 07:27:51" (1/1) ... [2021-07-13 19:27:51,999 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 13.07 07:27:51" (1/1) ... [2021-07-13 19:27:52,008 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 13.07 07:27:51" (1/1) ... [2021-07-13 19:27:52,009 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 13.07 07:27:51" (1/1) ... [2021-07-13 19:27:52,017 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 13.07 07:27:51" (1/1) ... [2021-07-13 19:27:52,020 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 13.07 07:27:51" (1/1) ... [2021-07-13 19:27:52,021 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 13.07 07:27:51" (1/1) ... [2021-07-13 19:27:52,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:27:52,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:27:52,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:27:52,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:27:52,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:27:51" (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 [2021-07-13 19:27:52,076 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:27:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:27:52,077 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:27:52,077 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:27:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:27:52,077 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:27:52,077 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:27:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:27:52,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:27:52,078 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:27:52,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:27:52,351 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-13 19:27:52,352 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:27:52 BoogieIcfgContainer [2021-07-13 19:27:52,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:27:52,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:27:52,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:27:52,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:27:52,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:27:51" (1/2) ... [2021-07-13 19:27:52,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c6371e7 and model type chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:27:52, skipping insertion in model container [2021-07-13 19:27:52,356 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 13.07 07:27:52" (2/2) ... [2021-07-13 19:27:52,357 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-opt-symm.wvr.bpl [2021-07-13 19:27:52,361 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:27:52,361 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:27:52,362 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:27:52,362 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:27:52,383 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:27:52,403 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:27:52,416 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:27:52,416 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:27:52,416 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:27:52,416 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:27:52,424 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:27:52,425 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:27:52,425 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:27:52,425 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:27:52,435 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-07-13 19:27:52,445 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) [2021-07-13 19:27:52,447 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) [2021-07-13 19:27:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:27:52,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:52,451 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:52,452 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:52,455 INFO L82 PathProgramCache]: Analyzing trace with hash -715556201, now seen corresponding path program 1 times [2021-07-13 19:27:52,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:52,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355098757] [2021-07-13 19:27:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:52,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:52,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355098757] [2021-07-13 19:27:52,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355098757] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:52,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:52,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:27:52,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462978208] [2021-07-13 19:27:52,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:27:52,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:52,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:27:52,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:27:52,607 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) [2021-07-13 19:27:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:52,643 INFO L93 Difference]: Finished difference Result 31 states and 58 transitions. [2021-07-13 19:27:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:27:52,645 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 [2021-07-13 19:27:52,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:52,656 INFO L225 Difference]: With dead ends: 31 [2021-07-13 19:27:52,656 INFO L226 Difference]: Without dead ends: 31 [2021-07-13 19:27:52,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:52,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-07-13 19:27:52,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-07-13 19:27:52,684 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) [2021-07-13 19:27:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 58 transitions. [2021-07-13 19:27:52,686 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 58 transitions. Word has length 12 [2021-07-13 19:27:52,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:52,687 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 58 transitions. [2021-07-13 19:27:52,687 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) [2021-07-13 19:27:52,687 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 58 transitions. [2021-07-13 19:27:52,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:27:52,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:52,688 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:52,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:27:52,689 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:52,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:52,692 INFO L82 PathProgramCache]: Analyzing trace with hash -434812415, now seen corresponding path program 2 times [2021-07-13 19:27:52,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:52,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391062900] [2021-07-13 19:27:52,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:52,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:52,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391062900] [2021-07-13 19:27:52,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391062900] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:52,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:52,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:27:52,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929708469] [2021-07-13 19:27:52,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:27:52,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:52,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:27:52,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:27:52,739 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) [2021-07-13 19:27:52,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:52,756 INFO L93 Difference]: Finished difference Result 35 states and 66 transitions. [2021-07-13 19:27:52,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:27:52,757 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 [2021-07-13 19:27:52,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:52,758 INFO L225 Difference]: With dead ends: 35 [2021-07-13 19:27:52,758 INFO L226 Difference]: Without dead ends: 35 [2021-07-13 19:27:52,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:52,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-07-13 19:27:52,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-07-13 19:27:52,761 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) [2021-07-13 19:27:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 66 transitions. [2021-07-13 19:27:52,762 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 66 transitions. Word has length 12 [2021-07-13 19:27:52,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:52,762 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 66 transitions. [2021-07-13 19:27:52,762 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) [2021-07-13 19:27:52,762 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 66 transitions. [2021-07-13 19:27:52,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:27:52,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:52,763 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:52,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:27:52,763 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:52,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:52,763 INFO L82 PathProgramCache]: Analyzing trace with hash 114514857, now seen corresponding path program 1 times [2021-07-13 19:27:52,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:52,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079274563] [2021-07-13 19:27:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:52,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:52,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079274563] [2021-07-13 19:27:52,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079274563] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:52,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:52,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:27:52,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990713992] [2021-07-13 19:27:52,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:27:52,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:52,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:27:52,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:52,809 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) [2021-07-13 19:27:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:52,858 INFO L93 Difference]: Finished difference Result 56 states and 103 transitions. [2021-07-13 19:27:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:27:52,859 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 [2021-07-13 19:27:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:52,860 INFO L225 Difference]: With dead ends: 56 [2021-07-13 19:27:52,861 INFO L226 Difference]: Without dead ends: 54 [2021-07-13 19:27:52,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:27:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-07-13 19:27:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2021-07-13 19:27:52,874 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) [2021-07-13 19:27:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-07-13 19:27:52,875 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 13 [2021-07-13 19:27:52,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:52,879 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-07-13 19:27:52,879 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) [2021-07-13 19:27:52,879 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-07-13 19:27:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:27:52,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:52,880 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:52,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:27:52,881 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:52,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:52,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1879146489, now seen corresponding path program 2 times [2021-07-13 19:27:52,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:52,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173492156] [2021-07-13 19:27:52,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:52,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:52,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173492156] [2021-07-13 19:27:52,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173492156] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:52,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:52,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:27:52,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308631304] [2021-07-13 19:27:52,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:27:52,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:52,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:27:52,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:52,951 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) [2021-07-13 19:27:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:53,014 INFO L93 Difference]: Finished difference Result 52 states and 97 transitions. [2021-07-13 19:27:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:27:53,014 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 [2021-07-13 19:27:53,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:53,017 INFO L225 Difference]: With dead ends: 52 [2021-07-13 19:27:53,017 INFO L226 Difference]: Without dead ends: 52 [2021-07-13 19:27:53,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:27:53,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-07-13 19:27:53,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-07-13 19:27:53,035 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) [2021-07-13 19:27:53,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 70 transitions. [2021-07-13 19:27:53,036 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 70 transitions. Word has length 13 [2021-07-13 19:27:53,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:53,036 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 70 transitions. [2021-07-13 19:27:53,036 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) [2021-07-13 19:27:53,036 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 70 transitions. [2021-07-13 19:27:53,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:27:53,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:53,037 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:53,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:27:53,037 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:53,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:53,037 INFO L82 PathProgramCache]: Analyzing trace with hash -544555159, now seen corresponding path program 3 times [2021-07-13 19:27:53,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:53,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735676817] [2021-07-13 19:27:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:53,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:53,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735676817] [2021-07-13 19:27:53,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735676817] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:53,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:53,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:27:53,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739378174] [2021-07-13 19:27:53,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:27:53,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:53,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:27:53,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:53,119 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) [2021-07-13 19:27:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:53,174 INFO L93 Difference]: Finished difference Result 41 states and 78 transitions. [2021-07-13 19:27:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:27:53,174 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 [2021-07-13 19:27:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:53,175 INFO L225 Difference]: With dead ends: 41 [2021-07-13 19:27:53,175 INFO L226 Difference]: Without dead ends: 41 [2021-07-13 19:27:53,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:27:53,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-07-13 19:27:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-07-13 19:27:53,180 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) [2021-07-13 19:27:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 70 transitions. [2021-07-13 19:27:53,181 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 70 transitions. Word has length 13 [2021-07-13 19:27:53,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:53,181 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 70 transitions. [2021-07-13 19:27:53,181 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) [2021-07-13 19:27:53,181 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 70 transitions. [2021-07-13 19:27:53,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:27:53,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:53,182 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:53,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:27:53,182 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:53,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:53,182 INFO L82 PathProgramCache]: Analyzing trace with hash 434832868, now seen corresponding path program 1 times [2021-07-13 19:27:53,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:53,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840855793] [2021-07-13 19:27:53,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:53,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:53,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840855793] [2021-07-13 19:27:53,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840855793] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:53,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:53,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:27:53,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043620626] [2021-07-13 19:27:53,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:27:53,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:53,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:27:53,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:27:53,242 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) [2021-07-13 19:27:53,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:53,254 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2021-07-13 19:27:53,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:27:53,255 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 [2021-07-13 19:27:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:53,256 INFO L225 Difference]: With dead ends: 63 [2021-07-13 19:27:53,256 INFO L226 Difference]: Without dead ends: 63 [2021-07-13 19:27:53,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:27:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-07-13 19:27:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2021-07-13 19:27:53,263 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) [2021-07-13 19:27:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 76 transitions. [2021-07-13 19:27:53,265 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 76 transitions. Word has length 13 [2021-07-13 19:27:53,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:53,265 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 76 transitions. [2021-07-13 19:27:53,265 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) [2021-07-13 19:27:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 76 transitions. [2021-07-13 19:27:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:27:53,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:53,266 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:53,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 19:27:53,266 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:53,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:53,266 INFO L82 PathProgramCache]: Analyzing trace with hash 373288736, now seen corresponding path program 2 times [2021-07-13 19:27:53,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:53,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944054320] [2021-07-13 19:27:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:53,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:53,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944054320] [2021-07-13 19:27:53,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944054320] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:27:53,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:27:53,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:27:53,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848675287] [2021-07-13 19:27:53,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:27:53,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:53,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:27:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:27:53,290 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) [2021-07-13 19:27:53,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:53,313 INFO L93 Difference]: Finished difference Result 44 states and 81 transitions. [2021-07-13 19:27:53,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:27:53,313 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 [2021-07-13 19:27:53,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:53,314 INFO L225 Difference]: With dead ends: 44 [2021-07-13 19:27:53,314 INFO L226 Difference]: Without dead ends: 39 [2021-07-13 19:27:53,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:27:53,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-13 19:27:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-07-13 19:27:53,320 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) [2021-07-13 19:27:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-07-13 19:27:53,320 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-07-13 19:27:53,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:53,320 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-07-13 19:27:53,320 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) [2021-07-13 19:27:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-07-13 19:27:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:27:53,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:53,324 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:53,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:27:53,324 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:53,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1182521280, now seen corresponding path program 1 times [2021-07-13 19:27:53,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:53,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038565090] [2021-07-13 19:27:53,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:53,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:53,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038565090] [2021-07-13 19:27:53,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038565090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:53,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618618181] [2021-07-13 19:27:53,551 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 [2021-07-13 19:27:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:53,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:27:53,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:54,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618618181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:54,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:54,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 19:27:54,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414865550] [2021-07-13 19:27:54,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:27:54,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:54,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:27:54,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:27:54,053 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) [2021-07-13 19:27:54,354 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-07-13 19:27:54,521 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-07-13 19:27:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:54,555 INFO L93 Difference]: Finished difference Result 71 states and 127 transitions. [2021-07-13 19:27:54,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:27:54,555 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 [2021-07-13 19:27:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:54,556 INFO L225 Difference]: With dead ends: 71 [2021-07-13 19:27:54,556 INFO L226 Difference]: Without dead ends: 58 [2021-07-13 19:27:54,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 738.6ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:27:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-07-13 19:27:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2021-07-13 19:27:54,558 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) [2021-07-13 19:27:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-07-13 19:27:54,558 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2021-07-13 19:27:54,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:54,558 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-07-13 19:27:54,558 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) [2021-07-13 19:27:54,558 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-07-13 19:27:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:27:54,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:54,559 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:54,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-07-13 19:27:54,760 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:54,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1118784670, now seen corresponding path program 2 times [2021-07-13 19:27:54,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:54,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009697844] [2021-07-13 19:27:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:54,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:54,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009697844] [2021-07-13 19:27:54,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009697844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:54,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939177817] [2021-07-13 19:27:54,969 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 [2021-07-13 19:27:55,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:55,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:55,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:27:55,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:55,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939177817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:55,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:55,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 19:27:55,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975228624] [2021-07-13 19:27:55,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:27:55,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:55,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:27:55,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:27:55,277 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) [2021-07-13 19:27:55,630 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-07-13 19:27:55,953 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-13 19:27:56,292 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-07-13 19:27:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:56,590 INFO L93 Difference]: Finished difference Result 101 states and 176 transitions. [2021-07-13 19:27:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:27:56,592 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 [2021-07-13 19:27:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:56,593 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:27:56,593 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:27:56,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1445.1ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:27:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:27:56,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 44. [2021-07-13 19:27:56,596 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) [2021-07-13 19:27:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 86 transitions. [2021-07-13 19:27:56,596 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 86 transitions. Word has length 14 [2021-07-13 19:27:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:56,597 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 86 transitions. [2021-07-13 19:27:56,597 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) [2021-07-13 19:27:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 86 transitions. [2021-07-13 19:27:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:27:56,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:56,597 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:56,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 19:27:56,817 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:56,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:56,817 INFO L82 PathProgramCache]: Analyzing trace with hash 531039348, now seen corresponding path program 3 times [2021-07-13 19:27:56,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:56,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290511169] [2021-07-13 19:27:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:56,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:56,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290511169] [2021-07-13 19:27:56,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290511169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:56,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911243716] [2021-07-13 19:27:56,937 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 [2021-07-13 19:27:56,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:27:56,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:56,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:27:56,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:57,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911243716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:57,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:57,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 19:27:57,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833786034] [2021-07-13 19:27:57,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:27:57,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:57,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:27:57,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:27:57,278 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) [2021-07-13 19:27:57,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:57,622 INFO L93 Difference]: Finished difference Result 68 states and 131 transitions. [2021-07-13 19:27:57,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:27:57,623 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 [2021-07-13 19:27:57,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:57,624 INFO L225 Difference]: With dead ends: 68 [2021-07-13 19:27:57,624 INFO L226 Difference]: Without dead ends: 57 [2021-07-13 19:27:57,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 481.6ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:27:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-07-13 19:27:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-07-13 19:27:57,631 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) [2021-07-13 19:27:57,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-07-13 19:27:57,631 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 14 [2021-07-13 19:27:57,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:57,631 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-07-13 19:27:57,631 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) [2021-07-13 19:27:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-07-13 19:27:57,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:27:57,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:57,632 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:57,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 19:27:57,851 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:57,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1865630678, now seen corresponding path program 4 times [2021-07-13 19:27:57,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:57,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730870475] [2021-07-13 19:27:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:58,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:58,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730870475] [2021-07-13 19:27:58,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730870475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:58,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451926356] [2021-07-13 19:27:58,000 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 [2021-07-13 19:27:58,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:58,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:58,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:27:58,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:58,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451926356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:58,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:58,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:27:58,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217682938] [2021-07-13 19:27:58,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:58,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:58,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:58,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:58,277 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) [2021-07-13 19:27:58,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:58,748 INFO L93 Difference]: Finished difference Result 99 states and 177 transitions. [2021-07-13 19:27:58,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:27:58,749 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 [2021-07-13 19:27:58,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:58,750 INFO L225 Difference]: With dead ends: 99 [2021-07-13 19:27:58,750 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:27:58,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 593.1ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:27:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:27:58,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2021-07-13 19:27:58,756 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) [2021-07-13 19:27:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 96 transitions. [2021-07-13 19:27:58,757 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 96 transitions. Word has length 14 [2021-07-13 19:27:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:58,757 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 96 transitions. [2021-07-13 19:27:58,757 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) [2021-07-13 19:27:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 96 transitions. [2021-07-13 19:27:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:27:58,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:58,757 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:58,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:27:58,961 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:58,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:58,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1327775100, now seen corresponding path program 5 times [2021-07-13 19:27:58,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:58,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134887072] [2021-07-13 19:27:58,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:59,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:59,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134887072] [2021-07-13 19:27:59,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134887072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:59,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707928059] [2021-07-13 19:27:59,101 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 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 [2021-07-13 19:27:59,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:27:59,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:59,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:27:59,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:59,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707928059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:59,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:59,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:27:59,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113466667] [2021-07-13 19:27:59,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:59,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:59,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:59,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:59,326 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) [2021-07-13 19:27:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:59,881 INFO L93 Difference]: Finished difference Result 110 states and 208 transitions. [2021-07-13 19:27:59,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:27:59,881 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 [2021-07-13 19:27:59,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:59,882 INFO L225 Difference]: With dead ends: 110 [2021-07-13 19:27:59,882 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 19:27:59,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 641.0ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:27:59,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 19:27:59,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-07-13 19:27:59,885 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) [2021-07-13 19:27:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2021-07-13 19:27:59,885 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 14 [2021-07-13 19:27:59,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:59,885 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2021-07-13 19:27:59,885 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) [2021-07-13 19:27:59,885 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2021-07-13 19:27:59,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:27:59,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:59,886 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:00,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 19:28:00,089 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:00,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:00,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1416837628, now seen corresponding path program 6 times [2021-07-13 19:28:00,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:00,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861788457] [2021-07-13 19:28:00,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:00,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:00,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861788457] [2021-07-13 19:28:00,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861788457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:00,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36817445] [2021-07-13 19:28:00,236 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:00,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:28:00,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:00,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:28:00,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:00,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36817445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:00,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:00,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 19:28:00,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23963334] [2021-07-13 19:28:00,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:28:00,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:00,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:28:00,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:00,512 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) [2021-07-13 19:28:00,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:00,852 INFO L93 Difference]: Finished difference Result 97 states and 182 transitions. [2021-07-13 19:28:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:28:00,853 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 [2021-07-13 19:28:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:00,853 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:28:00,854 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:28:00,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 467.9ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:28:00,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:28:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2021-07-13 19:28:00,855 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) [2021-07-13 19:28:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 115 transitions. [2021-07-13 19:28:00,860 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 115 transitions. Word has length 14 [2021-07-13 19:28:00,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:00,860 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 115 transitions. [2021-07-13 19:28:00,860 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) [2021-07-13 19:28:00,860 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 115 transitions. [2021-07-13 19:28:00,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:00,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:00,861 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:01,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:01,069 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:01,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1543538338, now seen corresponding path program 7 times [2021-07-13 19:28:01,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:01,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162607538] [2021-07-13 19:28:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:01,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:01,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162607538] [2021-07-13 19:28:01,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162607538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:01,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74118005] [2021-07-13 19:28:01,162 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 [2021-07-13 19:28:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:01,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:28:01,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:01,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74118005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:01,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:01,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:28:01,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075121666] [2021-07-13 19:28:01,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:28:01,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:01,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:28:01,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:01,410 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) [2021-07-13 19:28:01,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:01,817 INFO L93 Difference]: Finished difference Result 115 states and 207 transitions. [2021-07-13 19:28:01,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:28:01,817 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 [2021-07-13 19:28:01,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:01,818 INFO L225 Difference]: With dead ends: 115 [2021-07-13 19:28:01,818 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:28:01,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 494.0ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:01,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:28:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2021-07-13 19:28:01,820 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) [2021-07-13 19:28:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 117 transitions. [2021-07-13 19:28:01,820 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 117 transitions. Word has length 14 [2021-07-13 19:28:01,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:01,820 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 117 transitions. [2021-07-13 19:28:01,820 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) [2021-07-13 19:28:01,821 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 117 transitions. [2021-07-13 19:28:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:01,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:01,821 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:02,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 19:28:02,037 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:02,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:02,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2081393916, now seen corresponding path program 8 times [2021-07-13 19:28:02,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:02,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949714191] [2021-07-13 19:28:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:02,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:02,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949714191] [2021-07-13 19:28:02,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949714191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:02,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502925054] [2021-07-13 19:28:02,144 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 [2021-07-13 19:28:02,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:02,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:02,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:28:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:02,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502925054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:02,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:02,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:28:02,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196002326] [2021-07-13 19:28:02,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:28:02,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:02,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:28:02,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:02,443 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) [2021-07-13 19:28:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:02,764 INFO L93 Difference]: Finished difference Result 115 states and 215 transitions. [2021-07-13 19:28:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:28:02,765 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 [2021-07-13 19:28:02,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:02,765 INFO L225 Difference]: With dead ends: 115 [2021-07-13 19:28:02,765 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:28:02,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:28:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2021-07-13 19:28:02,767 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) [2021-07-13 19:28:02,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 125 transitions. [2021-07-13 19:28:02,768 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 125 transitions. Word has length 14 [2021-07-13 19:28:02,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:02,768 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 125 transitions. [2021-07-13 19:28:02,768 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) [2021-07-13 19:28:02,768 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 125 transitions. [2021-07-13 19:28:02,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:28:02,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:02,768 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:02,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 19:28:02,981 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:02,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1119481792, now seen corresponding path program 9 times [2021-07-13 19:28:02,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:02,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248189312] [2021-07-13 19:28:02,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:03,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:03,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248189312] [2021-07-13 19:28:03,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248189312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:03,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357640830] [2021-07-13 19:28:03,089 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 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 [2021-07-13 19:28:03,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:28:03,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:03,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:28:03,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:03,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357640830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:03,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:03,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:28:03,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780108111] [2021-07-13 19:28:03,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:28:03,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:03,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:28:03,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:03,438 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) [2021-07-13 19:28:04,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:04,304 INFO L93 Difference]: Finished difference Result 142 states and 277 transitions. [2021-07-13 19:28:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:28:04,305 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 [2021-07-13 19:28:04,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:04,321 INFO L225 Difference]: With dead ends: 142 [2021-07-13 19:28:04,321 INFO L226 Difference]: Without dead ends: 123 [2021-07-13 19:28:04,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 991.3ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:28:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-13 19:28:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2021-07-13 19:28:04,324 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) [2021-07-13 19:28:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 148 transitions. [2021-07-13 19:28:04,324 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 148 transitions. Word has length 14 [2021-07-13 19:28:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:04,325 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 148 transitions. [2021-07-13 19:28:04,325 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) [2021-07-13 19:28:04,325 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 148 transitions. [2021-07-13 19:28:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:04,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:04,325 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:04,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:04,533 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:04,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:04,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1559031433, now seen corresponding path program 10 times [2021-07-13 19:28:04,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:04,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863486397] [2021-07-13 19:28:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:04,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:04,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863486397] [2021-07-13 19:28:04,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863486397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:04,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707931537] [2021-07-13 19:28:04,584 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 [2021-07-13 19:28:04,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:04,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:04,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:04,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:04,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707931537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:04,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:04,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:28:04,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070495135] [2021-07-13 19:28:04,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:28:04,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:04,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:28:04,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:28:04,680 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) [2021-07-13 19:28:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:04,734 INFO L93 Difference]: Finished difference Result 102 states and 207 transitions. [2021-07-13 19:28:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:28:04,735 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 [2021-07-13 19:28:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:04,735 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:28:04,735 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:28:04,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:04,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:28:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2021-07-13 19:28:04,739 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) [2021-07-13 19:28:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-07-13 19:28:04,740 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-07-13 19:28:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:04,740 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-07-13 19:28:04,740 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) [2021-07-13 19:28:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-07-13 19:28:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:04,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:04,740 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:04,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 19:28:04,945 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1022375235, now seen corresponding path program 11 times [2021-07-13 19:28:04,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:04,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087063233] [2021-07-13 19:28:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:05,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:05,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087063233] [2021-07-13 19:28:05,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087063233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:05,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857467461] [2021-07-13 19:28:05,012 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 [2021-07-13 19:28:05,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:05,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:05,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:05,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:05,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857467461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:05,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:05,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:05,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213322553] [2021-07-13 19:28:05,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:05,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:05,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:05,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:05,133 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) [2021-07-13 19:28:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:05,392 INFO L93 Difference]: Finished difference Result 111 states and 225 transitions. [2021-07-13 19:28:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:28:05,393 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 [2021-07-13 19:28:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:05,393 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:28:05,393 INFO L226 Difference]: Without dead ends: 111 [2021-07-13 19:28:05,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:05,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-13 19:28:05,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2021-07-13 19:28:05,395 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) [2021-07-13 19:28:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-07-13 19:28:05,396 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-07-13 19:28:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:05,396 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-07-13 19:28:05,396 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) [2021-07-13 19:28:05,396 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-07-13 19:28:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:05,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:05,397 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:05,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:05,610 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:05,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1144507010, now seen corresponding path program 12 times [2021-07-13 19:28:05,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:05,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962507826] [2021-07-13 19:28:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:05,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:05,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962507826] [2021-07-13 19:28:05,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962507826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:05,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207777126] [2021-07-13 19:28:05,675 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 [2021-07-13 19:28:05,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:28:05,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:05,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:05,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:05,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207777126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:05,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:05,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:05,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550000589] [2021-07-13 19:28:05,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:05,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:05,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:05,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:05,844 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) [2021-07-13 19:28:06,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:06,296 INFO L93 Difference]: Finished difference Result 131 states and 251 transitions. [2021-07-13 19:28:06,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:28:06,305 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 [2021-07-13 19:28:06,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:06,320 INFO L225 Difference]: With dead ends: 131 [2021-07-13 19:28:06,320 INFO L226 Difference]: Without dead ends: 127 [2021-07-13 19:28:06,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 495.8ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:28:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-13 19:28:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 79. [2021-07-13 19:28:06,323 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) [2021-07-13 19:28:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 169 transitions. [2021-07-13 19:28:06,324 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 169 transitions. Word has length 15 [2021-07-13 19:28:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:06,324 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 169 transitions. [2021-07-13 19:28:06,324 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) [2021-07-13 19:28:06,324 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 169 transitions. [2021-07-13 19:28:06,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:06,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:06,324 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:06,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:06,536 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:06,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:06,537 INFO L82 PathProgramCache]: Analyzing trace with hash -225639483, now seen corresponding path program 13 times [2021-07-13 19:28:06,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:06,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316333306] [2021-07-13 19:28:06,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:06,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:06,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316333306] [2021-07-13 19:28:06,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316333306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:06,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305441863] [2021-07-13 19:28:06,602 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 [2021-07-13 19:28:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:06,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:06,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:06,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305441863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:06,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:06,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:06,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188385194] [2021-07-13 19:28:06,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:06,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:06,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:06,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:06,742 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) [2021-07-13 19:28:06,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:06,973 INFO L93 Difference]: Finished difference Result 141 states and 275 transitions. [2021-07-13 19:28:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:28:06,974 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 [2021-07-13 19:28:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:06,974 INFO L225 Difference]: With dead ends: 141 [2021-07-13 19:28:06,974 INFO L226 Difference]: Without dead ends: 141 [2021-07-13 19:28:06,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:06,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-13 19:28:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 79. [2021-07-13 19:28:06,977 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) [2021-07-13 19:28:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 169 transitions. [2021-07-13 19:28:06,977 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 169 transitions. Word has length 15 [2021-07-13 19:28:06,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:06,978 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 169 transitions. [2021-07-13 19:28:06,978 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) [2021-07-13 19:28:06,978 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 169 transitions. [2021-07-13 19:28:06,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:06,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:06,978 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:07,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-13 19:28:07,183 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:07,183 INFO L82 PathProgramCache]: Analyzing trace with hash -432834720, now seen corresponding path program 14 times [2021-07-13 19:28:07,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:07,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950299196] [2021-07-13 19:28:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:07,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:07,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950299196] [2021-07-13 19:28:07,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950299196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:07,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263997744] [2021-07-13 19:28:07,234 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 [2021-07-13 19:28:07,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:07,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:07,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:07,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:07,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263997744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:07,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:07,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:07,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226021238] [2021-07-13 19:28:07,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:07,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:07,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:07,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:07,377 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) [2021-07-13 19:28:07,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:07,586 INFO L93 Difference]: Finished difference Result 116 states and 229 transitions. [2021-07-13 19:28:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:28:07,586 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 [2021-07-13 19:28:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:07,587 INFO L225 Difference]: With dead ends: 116 [2021-07-13 19:28:07,587 INFO L226 Difference]: Without dead ends: 114 [2021-07-13 19:28:07,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-13 19:28:07,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-07-13 19:28:07,601 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) [2021-07-13 19:28:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 160 transitions. [2021-07-13 19:28:07,601 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 160 transitions. Word has length 15 [2021-07-13 19:28:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:07,601 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 160 transitions. [2021-07-13 19:28:07,601 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) [2021-07-13 19:28:07,602 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 160 transitions. [2021-07-13 19:28:07,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:07,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:07,602 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:07,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:07,803 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:07,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:07,803 INFO L82 PathProgramCache]: Analyzing trace with hash 250671963, now seen corresponding path program 15 times [2021-07-13 19:28:07,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:07,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153761928] [2021-07-13 19:28:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:07,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:07,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153761928] [2021-07-13 19:28:07,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153761928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:07,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79156622] [2021-07-13 19:28:07,851 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 [2021-07-13 19:28:07,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:28:07,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:07,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:07,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:07,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79156622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:07,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:07,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:07,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008828725] [2021-07-13 19:28:07,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:07,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:07,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:07,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:07,995 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) [2021-07-13 19:28:08,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:08,134 INFO L93 Difference]: Finished difference Result 107 states and 215 transitions. [2021-07-13 19:28:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:08,134 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 [2021-07-13 19:28:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:08,135 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:28:08,135 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:28:08,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:28:08,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2021-07-13 19:28:08,137 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) [2021-07-13 19:28:08,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 159 transitions. [2021-07-13 19:28:08,137 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 159 transitions. Word has length 15 [2021-07-13 19:28:08,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:08,137 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 159 transitions. [2021-07-13 19:28:08,137 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) [2021-07-13 19:28:08,137 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 159 transitions. [2021-07-13 19:28:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:08,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:08,138 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:08,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:08,349 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:08,350 INFO L82 PathProgramCache]: Analyzing trace with hash 901756610, now seen corresponding path program 16 times [2021-07-13 19:28:08,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:08,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274716007] [2021-07-13 19:28:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:08,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:08,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274716007] [2021-07-13 19:28:08,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274716007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:08,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334268170] [2021-07-13 19:28:08,396 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 [2021-07-13 19:28:08,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:08,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:08,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:08,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:08,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334268170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:08,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:08,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:08,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888051779] [2021-07-13 19:28:08,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:08,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:08,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:08,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:08,535 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) [2021-07-13 19:28:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:08,686 INFO L93 Difference]: Finished difference Result 100 states and 204 transitions. [2021-07-13 19:28:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:28:08,686 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 [2021-07-13 19:28:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:08,687 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:28:08,687 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 19:28:08,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 19:28:08,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 72. [2021-07-13 19:28:08,689 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) [2021-07-13 19:28:08,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-07-13 19:28:08,689 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-07-13 19:28:08,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:08,689 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-07-13 19:28:08,689 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) [2021-07-13 19:28:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-07-13 19:28:08,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:08,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:08,689 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:08,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:08,911 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:08,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:08,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2062611033, now seen corresponding path program 17 times [2021-07-13 19:28:08,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:08,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491481043] [2021-07-13 19:28:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:08,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:08,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491481043] [2021-07-13 19:28:08,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491481043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:08,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841053999] [2021-07-13 19:28:08,959 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 [2021-07-13 19:28:08,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:08,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:08,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:08,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:09,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841053999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:09,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:09,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:28:09,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913115044] [2021-07-13 19:28:09,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:28:09,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:09,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:28:09,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:09,072 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) [2021-07-13 19:28:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:09,161 INFO L93 Difference]: Finished difference Result 82 states and 172 transitions. [2021-07-13 19:28:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:28:09,161 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 [2021-07-13 19:28:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:09,163 INFO L225 Difference]: With dead ends: 82 [2021-07-13 19:28:09,163 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:28:09,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:28:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-07-13 19:28:09,165 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) [2021-07-13 19:28:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-07-13 19:28:09,166 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-07-13 19:28:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:09,166 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-07-13 19:28:09,166 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) [2021-07-13 19:28:09,166 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-07-13 19:28:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:09,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:09,166 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:09,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:09,369 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:09,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1265875281, now seen corresponding path program 18 times [2021-07-13 19:28:09,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:09,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740334786] [2021-07-13 19:28:09,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:09,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:09,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740334786] [2021-07-13 19:28:09,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740334786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:09,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216966409] [2021-07-13 19:28:09,420 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 [2021-07-13 19:28:09,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:28:09,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:09,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:09,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:09,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216966409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:09,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:09,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:09,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494555607] [2021-07-13 19:28:09,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:09,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:09,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:09,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:09,517 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) [2021-07-13 19:28:09,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:09,571 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2021-07-13 19:28:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:28:09,571 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 [2021-07-13 19:28:09,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:09,571 INFO L225 Difference]: With dead ends: 88 [2021-07-13 19:28:09,572 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:28:09,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:09,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:28:09,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-07-13 19:28:09,573 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) [2021-07-13 19:28:09,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-07-13 19:28:09,573 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-07-13 19:28:09,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:09,573 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-07-13 19:28:09,574 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) [2021-07-13 19:28:09,574 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-07-13 19:28:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:09,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:09,574 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:09,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:09,789 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:09,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:09,789 INFO L82 PathProgramCache]: Analyzing trace with hash -978325046, now seen corresponding path program 19 times [2021-07-13 19:28:09,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:09,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190263013] [2021-07-13 19:28:09,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:09,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:09,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190263013] [2021-07-13 19:28:09,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190263013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:09,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677382698] [2021-07-13 19:28:09,834 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 [2021-07-13 19:28:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:09,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:10,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677382698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:10,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:10,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:10,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48430828] [2021-07-13 19:28:10,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:10,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:10,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:10,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:10,044 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) [2021-07-13 19:28:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:10,086 INFO L93 Difference]: Finished difference Result 79 states and 164 transitions. [2021-07-13 19:28:10,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:28:10,087 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 [2021-07-13 19:28:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:10,087 INFO L225 Difference]: With dead ends: 79 [2021-07-13 19:28:10,087 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:28:10,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:10,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:28:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-07-13 19:28:10,089 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) [2021-07-13 19:28:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 144 transitions. [2021-07-13 19:28:10,089 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 144 transitions. Word has length 15 [2021-07-13 19:28:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:10,089 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 144 transitions. [2021-07-13 19:28:10,089 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) [2021-07-13 19:28:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 144 transitions. [2021-07-13 19:28:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:10,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:10,090 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:10,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:10,308 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:10,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:10,308 INFO L82 PathProgramCache]: Analyzing trace with hash 367867078, now seen corresponding path program 20 times [2021-07-13 19:28:10,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:10,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525657313] [2021-07-13 19:28:10,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:10,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:10,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525657313] [2021-07-13 19:28:10,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525657313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:10,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131853178] [2021-07-13 19:28:10,350 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 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 [2021-07-13 19:28:10,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:10,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:10,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:10,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:10,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131853178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:10,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:10,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:10,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424678111] [2021-07-13 19:28:10,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:10,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:10,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:10,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:10,501 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) [2021-07-13 19:28:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:10,646 INFO L93 Difference]: Finished difference Result 124 states and 235 transitions. [2021-07-13 19:28:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:28:10,647 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 [2021-07-13 19:28:10,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:10,648 INFO L225 Difference]: With dead ends: 124 [2021-07-13 19:28:10,648 INFO L226 Difference]: Without dead ends: 124 [2021-07-13 19:28:10,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:28:10,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-07-13 19:28:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 71. [2021-07-13 19:28:10,649 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) [2021-07-13 19:28:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-07-13 19:28:10,650 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-07-13 19:28:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:10,650 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-07-13 19:28:10,650 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) [2021-07-13 19:28:10,650 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-07-13 19:28:10,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:10,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:10,650 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:10,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-13 19:28:10,861 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:10,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1862953191, now seen corresponding path program 21 times [2021-07-13 19:28:10,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:10,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765760645] [2021-07-13 19:28:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:10,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:10,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765760645] [2021-07-13 19:28:10,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765760645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:10,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940490933] [2021-07-13 19:28:10,906 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 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 [2021-07-13 19:28:10,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:28:10,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:10,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:10,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:11,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940490933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:11,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:11,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:11,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392844309] [2021-07-13 19:28:11,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:11,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:11,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:11,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:11,065 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) [2021-07-13 19:28:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:11,159 INFO L93 Difference]: Finished difference Result 114 states and 220 transitions. [2021-07-13 19:28:11,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:11,160 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 [2021-07-13 19:28:11,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:11,160 INFO L225 Difference]: With dead ends: 114 [2021-07-13 19:28:11,160 INFO L226 Difference]: Without dead ends: 108 [2021-07-13 19:28:11,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:28:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-07-13 19:28:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2021-07-13 19:28:11,163 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) [2021-07-13 19:28:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 176 transitions. [2021-07-13 19:28:11,163 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 176 transitions. Word has length 15 [2021-07-13 19:28:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:11,163 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 176 transitions. [2021-07-13 19:28:11,163 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) [2021-07-13 19:28:11,163 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 176 transitions. [2021-07-13 19:28:11,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:11,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:11,163 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:11,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 19:28:11,372 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:11,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:11,372 INFO L82 PathProgramCache]: Analyzing trace with hash -169988500, now seen corresponding path program 22 times [2021-07-13 19:28:11,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:11,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483345700] [2021-07-13 19:28:11,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:11,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:11,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483345700] [2021-07-13 19:28:11,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483345700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:11,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422255798] [2021-07-13 19:28:11,425 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 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 [2021-07-13 19:28:11,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:11,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:11,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:11,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:11,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422255798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:11,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:11,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:11,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500688851] [2021-07-13 19:28:11,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:11,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:11,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:11,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:11,522 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) [2021-07-13 19:28:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:11,566 INFO L93 Difference]: Finished difference Result 96 states and 201 transitions. [2021-07-13 19:28:11,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:28:11,566 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 [2021-07-13 19:28:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:11,567 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:28:11,567 INFO L226 Difference]: Without dead ends: 96 [2021-07-13 19:28:11,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-13 19:28:11,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2021-07-13 19:28:11,569 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) [2021-07-13 19:28:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 172 transitions. [2021-07-13 19:28:11,569 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 172 transitions. Word has length 15 [2021-07-13 19:28:11,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:11,569 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 172 transitions. [2021-07-13 19:28:11,569 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) [2021-07-13 19:28:11,569 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 172 transitions. [2021-07-13 19:28:11,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:11,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:11,570 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:11,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:11,777 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:11,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:11,777 INFO L82 PathProgramCache]: Analyzing trace with hash 961923201, now seen corresponding path program 23 times [2021-07-13 19:28:11,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:11,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41889986] [2021-07-13 19:28:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:11,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:11,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41889986] [2021-07-13 19:28:11,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41889986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:11,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215798719] [2021-07-13 19:28:11,830 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 [2021-07-13 19:28:11,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:11,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:11,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:11,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:11,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215798719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:11,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:11,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:11,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796520398] [2021-07-13 19:28:11,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:11,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:11,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:11,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:11,919 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) [2021-07-13 19:28:11,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:11,958 INFO L93 Difference]: Finished difference Result 91 states and 190 transitions. [2021-07-13 19:28:11,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:28:11,959 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 [2021-07-13 19:28:11,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:11,959 INFO L225 Difference]: With dead ends: 91 [2021-07-13 19:28:11,959 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:28:11,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:28:11,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2021-07-13 19:28:11,961 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) [2021-07-13 19:28:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-07-13 19:28:11,961 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-07-13 19:28:11,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:11,962 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-07-13 19:28:11,962 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) [2021-07-13 19:28:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-07-13 19:28:11,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:11,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:11,962 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:12,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 19:28:12,173 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:12,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:12,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1551463716, now seen corresponding path program 24 times [2021-07-13 19:28:12,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:12,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227988277] [2021-07-13 19:28:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:12,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:12,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227988277] [2021-07-13 19:28:12,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227988277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:12,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983452168] [2021-07-13 19:28:12,216 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 [2021-07-13 19:28:12,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:28:12,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:12,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:12,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:12,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983452168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:12,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:12,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:12,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011721284] [2021-07-13 19:28:12,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:12,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:12,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:12,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:12,352 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) [2021-07-13 19:28:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:12,410 INFO L93 Difference]: Finished difference Result 84 states and 177 transitions. [2021-07-13 19:28:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:28:12,413 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 [2021-07-13 19:28:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:12,413 INFO L225 Difference]: With dead ends: 84 [2021-07-13 19:28:12,414 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 19:28:12,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 19:28:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2021-07-13 19:28:12,416 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) [2021-07-13 19:28:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-07-13 19:28:12,416 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-07-13 19:28:12,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:12,417 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-07-13 19:28:12,417 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) [2021-07-13 19:28:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-07-13 19:28:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:12,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:12,417 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:12,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:12,637 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:12,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:12,637 INFO L82 PathProgramCache]: Analyzing trace with hash 930413889, now seen corresponding path program 25 times [2021-07-13 19:28:12,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:12,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108336346] [2021-07-13 19:28:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:12,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:12,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108336346] [2021-07-13 19:28:12,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108336346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:12,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076495240] [2021-07-13 19:28:12,680 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 [2021-07-13 19:28:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:12,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:12,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076495240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:12,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:12,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:12,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982851819] [2021-07-13 19:28:12,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:12,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:12,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:12,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:12,840 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) [2021-07-13 19:28:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:12,954 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-07-13 19:28:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:12,955 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 [2021-07-13 19:28:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:12,955 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:28:12,955 INFO L226 Difference]: Without dead ends: 101 [2021-07-13 19:28:12,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-13 19:28:12,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 80. [2021-07-13 19:28:12,957 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) [2021-07-13 19:28:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-07-13 19:28:12,957 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-07-13 19:28:12,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:12,957 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-07-13 19:28:12,957 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) [2021-07-13 19:28:12,957 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-07-13 19:28:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:12,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:12,958 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:13,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 19:28:13,165 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:13,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:13,165 INFO L82 PathProgramCache]: Analyzing trace with hash -742071201, now seen corresponding path program 26 times [2021-07-13 19:28:13,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:13,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402220008] [2021-07-13 19:28:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:13,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:13,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402220008] [2021-07-13 19:28:13,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402220008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:13,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882842971] [2021-07-13 19:28:13,211 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 [2021-07-13 19:28:13,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:13,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:13,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:13,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:13,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882842971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:13,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:13,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:13,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601144139] [2021-07-13 19:28:13,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:13,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:13,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:13,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:13,365 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) [2021-07-13 19:28:13,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:13,441 INFO L93 Difference]: Finished difference Result 89 states and 182 transitions. [2021-07-13 19:28:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:28:13,442 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 [2021-07-13 19:28:13,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:13,442 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:28:13,442 INFO L226 Difference]: Without dead ends: 83 [2021-07-13 19:28:13,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:28:13,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-13 19:28:13,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-07-13 19:28:13,444 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) [2021-07-13 19:28:13,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-07-13 19:28:13,444 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-07-13 19:28:13,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:13,445 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-07-13 19:28:13,445 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) [2021-07-13 19:28:13,445 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-07-13 19:28:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:13,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:13,445 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:13,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-13 19:28:13,653 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:13,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:13,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1373313029, now seen corresponding path program 27 times [2021-07-13 19:28:13,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:13,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204588509] [2021-07-13 19:28:13,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:13,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:13,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204588509] [2021-07-13 19:28:13,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204588509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:13,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494397181] [2021-07-13 19:28:13,696 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 [2021-07-13 19:28:13,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:28:13,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:13,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:13,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:13,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494397181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:13,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:13,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:13,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207189254] [2021-07-13 19:28:13,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:13,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:13,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:13,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:13,889 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) [2021-07-13 19:28:14,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:14,125 INFO L93 Difference]: Finished difference Result 122 states and 241 transitions. [2021-07-13 19:28:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:28:14,125 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 [2021-07-13 19:28:14,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:14,126 INFO L225 Difference]: With dead ends: 122 [2021-07-13 19:28:14,126 INFO L226 Difference]: Without dead ends: 122 [2021-07-13 19:28:14,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:28:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-13 19:28:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 80. [2021-07-13 19:28:14,127 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) [2021-07-13 19:28:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-07-13 19:28:14,128 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-07-13 19:28:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:14,128 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-07-13 19:28:14,128 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) [2021-07-13 19:28:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-07-13 19:28:14,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:14,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:14,128 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:14,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:14,345 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:14,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1660863264, now seen corresponding path program 28 times [2021-07-13 19:28:14,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:14,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072132101] [2021-07-13 19:28:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:14,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:14,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072132101] [2021-07-13 19:28:14,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072132101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:14,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927878738] [2021-07-13 19:28:14,393 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 [2021-07-13 19:28:14,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:14,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:14,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:14,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:14,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927878738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:14,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:14,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:14,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380261031] [2021-07-13 19:28:14,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:14,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:14,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:14,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:14,560 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) [2021-07-13 19:28:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:14,791 INFO L93 Difference]: Finished difference Result 152 states and 289 transitions. [2021-07-13 19:28:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:28:14,792 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 [2021-07-13 19:28:14,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:14,792 INFO L225 Difference]: With dead ends: 152 [2021-07-13 19:28:14,792 INFO L226 Difference]: Without dead ends: 152 [2021-07-13 19:28:14,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-13 19:28:14,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 80. [2021-07-13 19:28:14,794 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) [2021-07-13 19:28:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-07-13 19:28:14,794 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-07-13 19:28:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:14,794 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-07-13 19:28:14,795 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) [2021-07-13 19:28:14,795 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-07-13 19:28:14,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:14,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:14,795 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:15,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 19:28:15,006 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:15,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:15,006 INFO L82 PathProgramCache]: Analyzing trace with hash -299172061, now seen corresponding path program 29 times [2021-07-13 19:28:15,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:15,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325626999] [2021-07-13 19:28:15,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:15,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:15,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325626999] [2021-07-13 19:28:15,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325626999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:15,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76024223] [2021-07-13 19:28:15,053 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 [2021-07-13 19:28:15,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:15,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:15,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:15,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:15,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76024223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:15,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:15,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:15,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892576184] [2021-07-13 19:28:15,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:15,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:15,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:15,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:15,231 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) [2021-07-13 19:28:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:15,494 INFO L93 Difference]: Finished difference Result 129 states and 251 transitions. [2021-07-13 19:28:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:28:15,494 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 [2021-07-13 19:28:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:15,494 INFO L225 Difference]: With dead ends: 129 [2021-07-13 19:28:15,495 INFO L226 Difference]: Without dead ends: 123 [2021-07-13 19:28:15,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 323.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:28:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-13 19:28:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 80. [2021-07-13 19:28:15,496 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) [2021-07-13 19:28:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-07-13 19:28:15,497 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-07-13 19:28:15,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:15,497 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-07-13 19:28:15,497 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) [2021-07-13 19:28:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-07-13 19:28:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:15,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:15,497 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:15,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 19:28:15,706 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:15,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:15,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1962853544, now seen corresponding path program 30 times [2021-07-13 19:28:15,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:15,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972853582] [2021-07-13 19:28:15,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:15,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:15,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972853582] [2021-07-13 19:28:15,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972853582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:15,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505387706] [2021-07-13 19:28:15,755 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 [2021-07-13 19:28:15,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:28:15,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:15,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:15,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:15,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505387706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:15,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:15,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:15,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687719780] [2021-07-13 19:28:15,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:15,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:15,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:15,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:15,862 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) [2021-07-13 19:28:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:15,966 INFO L93 Difference]: Finished difference Result 123 states and 249 transitions. [2021-07-13 19:28:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:15,967 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 [2021-07-13 19:28:15,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:15,967 INFO L225 Difference]: With dead ends: 123 [2021-07-13 19:28:15,967 INFO L226 Difference]: Without dead ends: 123 [2021-07-13 19:28:15,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-13 19:28:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 80. [2021-07-13 19:28:15,969 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) [2021-07-13 19:28:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-07-13 19:28:15,969 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-07-13 19:28:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:15,970 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-07-13 19:28:15,970 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) [2021-07-13 19:28:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-07-13 19:28:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:15,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:15,970 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:16,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:16,177 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:16,177 INFO L82 PathProgramCache]: Analyzing trace with hash 207174205, now seen corresponding path program 31 times [2021-07-13 19:28:16,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:16,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694786582] [2021-07-13 19:28:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:16,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:16,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694786582] [2021-07-13 19:28:16,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694786582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:16,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485374395] [2021-07-13 19:28:16,220 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 [2021-07-13 19:28:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:16,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:16,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:16,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485374395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:16,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:16,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:28:16,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324996860] [2021-07-13 19:28:16,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:28:16,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:16,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:28:16,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:28:16,397 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) [2021-07-13 19:28:16,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:16,501 INFO L93 Difference]: Finished difference Result 107 states and 214 transitions. [2021-07-13 19:28:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:28:16,502 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 [2021-07-13 19:28:16,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:16,502 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:28:16,502 INFO L226 Difference]: Without dead ends: 96 [2021-07-13 19:28:16,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:28:16,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-13 19:28:16,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 75. [2021-07-13 19:28:16,504 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) [2021-07-13 19:28:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 158 transitions. [2021-07-13 19:28:16,504 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 158 transitions. Word has length 15 [2021-07-13 19:28:16,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:16,504 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 158 transitions. [2021-07-13 19:28:16,504 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) [2021-07-13 19:28:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 158 transitions. [2021-07-13 19:28:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:28:16,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:16,505 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:16,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-13 19:28:16,722 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:16,723 INFO L82 PathProgramCache]: Analyzing trace with hash 868761956, now seen corresponding path program 32 times [2021-07-13 19:28:16,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:16,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843388650] [2021-07-13 19:28:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:16,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:16,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843388650] [2021-07-13 19:28:16,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843388650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:16,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308854830] [2021-07-13 19:28:16,764 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 [2021-07-13 19:28:16,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:16,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:16,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:16,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:16,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308854830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:16,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:16,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:28:16,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719959772] [2021-07-13 19:28:16,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:28:16,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:16,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:28:16,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:28:16,837 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) [2021-07-13 19:28:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:16,902 INFO L93 Difference]: Finished difference Result 110 states and 222 transitions. [2021-07-13 19:28:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:28:16,903 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 [2021-07-13 19:28:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:16,903 INFO L225 Difference]: With dead ends: 110 [2021-07-13 19:28:16,903 INFO L226 Difference]: Without dead ends: 110 [2021-07-13 19:28:16,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-13 19:28:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2021-07-13 19:28:16,905 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) [2021-07-13 19:28:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 151 transitions. [2021-07-13 19:28:16,905 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 151 transitions. Word has length 15 [2021-07-13 19:28:16,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:16,905 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 151 transitions. [2021-07-13 19:28:16,905 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) [2021-07-13 19:28:16,905 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 151 transitions. [2021-07-13 19:28:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:16,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:16,906 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:17,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-13 19:28:17,106 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:17,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:17,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1907254775, now seen corresponding path program 33 times [2021-07-13 19:28:17,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:17,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794146491] [2021-07-13 19:28:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:17,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:17,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794146491] [2021-07-13 19:28:17,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794146491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:17,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917606617] [2021-07-13 19:28:17,276 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 [2021-07-13 19:28:17,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:28:17,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:17,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:17,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:17,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917606617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:17,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:17,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:17,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111965497] [2021-07-13 19:28:17,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:17,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:17,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:17,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:17,590 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) [2021-07-13 19:28:17,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:17,899 INFO L93 Difference]: Finished difference Result 138 states and 265 transitions. [2021-07-13 19:28:17,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:17,899 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 [2021-07-13 19:28:17,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:17,900 INFO L225 Difference]: With dead ends: 138 [2021-07-13 19:28:17,900 INFO L226 Difference]: Without dead ends: 123 [2021-07-13 19:28:17,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 560.5ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:28:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-13 19:28:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2021-07-13 19:28:17,902 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) [2021-07-13 19:28:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 153 transitions. [2021-07-13 19:28:17,902 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 153 transitions. Word has length 16 [2021-07-13 19:28:17,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:17,902 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 153 transitions. [2021-07-13 19:28:17,902 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) [2021-07-13 19:28:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 153 transitions. [2021-07-13 19:28:17,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:17,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:17,903 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:18,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:18,103 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:18,104 INFO L82 PathProgramCache]: Analyzing trace with hash 233295193, now seen corresponding path program 34 times [2021-07-13 19:28:18,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:18,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748680904] [2021-07-13 19:28:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:18,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:18,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748680904] [2021-07-13 19:28:18,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748680904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:18,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050786886] [2021-07-13 19:28:18,270 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 [2021-07-13 19:28:18,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:18,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:18,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:18,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:18,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050786886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:18,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:18,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:28:18,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898665328] [2021-07-13 19:28:18,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:28:18,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:18,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:28:18,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:18,559 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) [2021-07-13 19:28:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:19,199 INFO L93 Difference]: Finished difference Result 138 states and 266 transitions. [2021-07-13 19:28:19,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:28:19,199 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 [2021-07-13 19:28:19,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:19,200 INFO L225 Difference]: With dead ends: 138 [2021-07-13 19:28:19,200 INFO L226 Difference]: Without dead ends: 125 [2021-07-13 19:28:19,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 778.2ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:28:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-13 19:28:19,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2021-07-13 19:28:19,202 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) [2021-07-13 19:28:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-07-13 19:28:19,202 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 16 [2021-07-13 19:28:19,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:19,202 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-07-13 19:28:19,202 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) [2021-07-13 19:28:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-07-13 19:28:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:19,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:19,203 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:19,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 19:28:19,420 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:19,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:19,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1344046537, now seen corresponding path program 35 times [2021-07-13 19:28:19,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:19,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534965813] [2021-07-13 19:28:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:19,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:19,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534965813] [2021-07-13 19:28:19,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534965813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:19,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40455596] [2021-07-13 19:28:19,606 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 [2021-07-13 19:28:19,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:19,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:19,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:19,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40455596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:19,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:19,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:19,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462552870] [2021-07-13 19:28:19,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:19,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:19,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:19,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:19,914 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) [2021-07-13 19:28:20,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:20,955 INFO L93 Difference]: Finished difference Result 163 states and 313 transitions. [2021-07-13 19:28:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:28:20,955 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 [2021-07-13 19:28:20,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:20,956 INFO L225 Difference]: With dead ends: 163 [2021-07-13 19:28:20,956 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:28:20,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1153.8ms TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:28:20,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:28:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 75. [2021-07-13 19:28:20,958 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) [2021-07-13 19:28:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-07-13 19:28:20,958 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 16 [2021-07-13 19:28:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:20,958 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-07-13 19:28:20,958 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) [2021-07-13 19:28:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-07-13 19:28:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:20,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:20,959 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:21,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:21,173 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:21,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:21,173 INFO L82 PathProgramCache]: Analyzing trace with hash -806940605, now seen corresponding path program 36 times [2021-07-13 19:28:21,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:21,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049758425] [2021-07-13 19:28:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:21,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:21,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049758425] [2021-07-13 19:28:21,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049758425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:21,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526128739] [2021-07-13 19:28:21,327 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 [2021-07-13 19:28:21,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:28:21,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:21,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:21,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:21,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526128739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:21,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:21,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:28:21,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063810830] [2021-07-13 19:28:21,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:28:21,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:21,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:28:21,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:21,729 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) [2021-07-13 19:28:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:22,202 INFO L93 Difference]: Finished difference Result 116 states and 226 transitions. [2021-07-13 19:28:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:28:22,202 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 [2021-07-13 19:28:22,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:22,202 INFO L225 Difference]: With dead ends: 116 [2021-07-13 19:28:22,202 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:28:22,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 739.3ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:28:22,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:28:22,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2021-07-13 19:28:22,204 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) [2021-07-13 19:28:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 159 transitions. [2021-07-13 19:28:22,204 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 159 transitions. Word has length 16 [2021-07-13 19:28:22,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:22,204 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 159 transitions. [2021-07-13 19:28:22,205 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) [2021-07-13 19:28:22,205 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 159 transitions. [2021-07-13 19:28:22,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:22,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:22,205 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:22,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-13 19:28:22,413 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:22,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:22,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1910684961, now seen corresponding path program 37 times [2021-07-13 19:28:22,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:22,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861690182] [2021-07-13 19:28:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:22,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:22,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861690182] [2021-07-13 19:28:22,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861690182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:22,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254106666] [2021-07-13 19:28:22,648 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 [2021-07-13 19:28:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:22,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:22,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:22,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254106666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:22,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:22,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:22,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502953224] [2021-07-13 19:28:22,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:22,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:22,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:22,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:22,941 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) [2021-07-13 19:28:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:23,572 INFO L93 Difference]: Finished difference Result 128 states and 249 transitions. [2021-07-13 19:28:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:28:23,572 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 [2021-07-13 19:28:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:23,573 INFO L225 Difference]: With dead ends: 128 [2021-07-13 19:28:23,573 INFO L226 Difference]: Without dead ends: 121 [2021-07-13 19:28:23,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 764.0ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:28:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-13 19:28:23,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 78. [2021-07-13 19:28:23,576 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) [2021-07-13 19:28:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-07-13 19:28:23,576 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-07-13 19:28:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:23,576 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-07-13 19:28:23,576 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) [2021-07-13 19:28:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-07-13 19:28:23,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:23,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:23,577 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:23,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-07-13 19:28:23,781 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1049691005, now seen corresponding path program 38 times [2021-07-13 19:28:23,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:23,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047621540] [2021-07-13 19:28:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:23,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:23,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047621540] [2021-07-13 19:28:23,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047621540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:23,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497124994] [2021-07-13 19:28:23,934 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 [2021-07-13 19:28:23,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:23,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:23,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:23,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:24,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497124994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:24,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:24,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:24,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303596455] [2021-07-13 19:28:24,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:24,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:24,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:24,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:24,286 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) [2021-07-13 19:28:24,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:24,810 INFO L93 Difference]: Finished difference Result 141 states and 268 transitions. [2021-07-13 19:28:24,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:24,810 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 [2021-07-13 19:28:24,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:24,811 INFO L225 Difference]: With dead ends: 141 [2021-07-13 19:28:24,811 INFO L226 Difference]: Without dead ends: 111 [2021-07-13 19:28:24,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 726.2ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:28:24,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-13 19:28:24,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 79. [2021-07-13 19:28:24,813 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) [2021-07-13 19:28:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 163 transitions. [2021-07-13 19:28:24,813 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 163 transitions. Word has length 16 [2021-07-13 19:28:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:24,813 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 163 transitions. [2021-07-13 19:28:24,813 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) [2021-07-13 19:28:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 163 transitions. [2021-07-13 19:28:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:24,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:24,814 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:25,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:25,031 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:25,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1877936069, now seen corresponding path program 39 times [2021-07-13 19:28:25,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:25,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671531104] [2021-07-13 19:28:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:25,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:25,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671531104] [2021-07-13 19:28:25,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671531104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:25,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322835722] [2021-07-13 19:28:25,270 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 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 [2021-07-13 19:28:25,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:28:25,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:25,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:25,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:25,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322835722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:25,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:25,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:25,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061570151] [2021-07-13 19:28:25,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:25,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:25,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:25,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:25,599 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) [2021-07-13 19:28:26,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:26,197 INFO L93 Difference]: Finished difference Result 145 states and 279 transitions. [2021-07-13 19:28:26,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:28:26,201 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 [2021-07-13 19:28:26,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:26,201 INFO L225 Difference]: With dead ends: 145 [2021-07-13 19:28:26,201 INFO L226 Difference]: Without dead ends: 127 [2021-07-13 19:28:26,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 840.0ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:28:26,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-13 19:28:26,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2021-07-13 19:28:26,203 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) [2021-07-13 19:28:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 176 transitions. [2021-07-13 19:28:26,203 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 176 transitions. Word has length 16 [2021-07-13 19:28:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:26,204 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 176 transitions. [2021-07-13 19:28:26,204 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) [2021-07-13 19:28:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 176 transitions. [2021-07-13 19:28:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:26,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:26,204 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:26,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-13 19:28:26,417 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:26,417 INFO L82 PathProgramCache]: Analyzing trace with hash -543344739, now seen corresponding path program 40 times [2021-07-13 19:28:26,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:26,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872032944] [2021-07-13 19:28:26,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:26,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:26,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872032944] [2021-07-13 19:28:26,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872032944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:26,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409670734] [2021-07-13 19:28:26,565 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 [2021-07-13 19:28:26,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:26,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:26,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:26,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:26,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409670734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:26,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:26,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:26,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740931585] [2021-07-13 19:28:26,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:26,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:26,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:26,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:26,904 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) [2021-07-13 19:28:27,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:27,661 INFO L93 Difference]: Finished difference Result 173 states and 327 transitions. [2021-07-13 19:28:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:28:27,661 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 [2021-07-13 19:28:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:27,662 INFO L225 Difference]: With dead ends: 173 [2021-07-13 19:28:27,662 INFO L226 Difference]: Without dead ends: 154 [2021-07-13 19:28:27,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 873.6ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:28:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-13 19:28:27,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 84. [2021-07-13 19:28:27,664 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) [2021-07-13 19:28:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 177 transitions. [2021-07-13 19:28:27,664 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 177 transitions. Word has length 16 [2021-07-13 19:28:27,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:27,664 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 177 transitions. [2021-07-13 19:28:27,664 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) [2021-07-13 19:28:27,664 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 177 transitions. [2021-07-13 19:28:27,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:27,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:27,665 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:27,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:27,881 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:27,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:27,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1081200317, now seen corresponding path program 41 times [2021-07-13 19:28:27,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:27,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640823036] [2021-07-13 19:28:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:28,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:28,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640823036] [2021-07-13 19:28:28,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640823036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:28,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039590929] [2021-07-13 19:28:28,032 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 [2021-07-13 19:28:28,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:28:28,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:28,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:28,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039590929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:28,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:28,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:28,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588054084] [2021-07-13 19:28:28,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:28,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:28,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:28,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:28,365 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) [2021-07-13 19:28:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:28,972 INFO L93 Difference]: Finished difference Result 179 states and 342 transitions. [2021-07-13 19:28:28,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:28:28,972 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 [2021-07-13 19:28:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:28,973 INFO L225 Difference]: With dead ends: 179 [2021-07-13 19:28:28,973 INFO L226 Difference]: Without dead ends: 160 [2021-07-13 19:28:28,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 762.3ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:28:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-13 19:28:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 86. [2021-07-13 19:28:28,975 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) [2021-07-13 19:28:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-07-13 19:28:28,975 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-07-13 19:28:28,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:28,975 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-07-13 19:28:28,975 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) [2021-07-13 19:28:28,975 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-07-13 19:28:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:28,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:28,975 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:29,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-13 19:28:29,189 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:29,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:29,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1305488025, now seen corresponding path program 42 times [2021-07-13 19:28:29,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:29,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932660330] [2021-07-13 19:28:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:29,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:29,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932660330] [2021-07-13 19:28:29,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932660330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:29,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222115905] [2021-07-13 19:28:29,317 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 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 [2021-07-13 19:28:29,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:28:29,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:29,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:29,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:29,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222115905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:29,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:29,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:28:29,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676082692] [2021-07-13 19:28:29,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:28:29,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:29,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:28:29,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:29,662 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) [2021-07-13 19:28:30,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:30,013 INFO L93 Difference]: Finished difference Result 107 states and 215 transitions. [2021-07-13 19:28:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:28:30,013 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 [2021-07-13 19:28:30,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:30,013 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:28:30,014 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:28:30,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 581.1ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:28:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:28:30,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2021-07-13 19:28:30,015 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) [2021-07-13 19:28:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 184 transitions. [2021-07-13 19:28:30,016 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 184 transitions. Word has length 16 [2021-07-13 19:28:30,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:30,016 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 184 transitions. [2021-07-13 19:28:30,016 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) [2021-07-13 19:28:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 184 transitions. [2021-07-13 19:28:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:30,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:30,016 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:30,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:30,228 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:30,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:30,228 INFO L82 PathProgramCache]: Analyzing trace with hash -271853705, now seen corresponding path program 43 times [2021-07-13 19:28:30,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:30,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021336679] [2021-07-13 19:28:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:30,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:30,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021336679] [2021-07-13 19:28:30,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021336679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:30,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958628533] [2021-07-13 19:28:30,429 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 [2021-07-13 19:28:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:30,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:30,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:30,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958628533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:30,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:30,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:30,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030184722] [2021-07-13 19:28:30,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:30,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:30,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:30,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:30,710 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) [2021-07-13 19:28:31,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:31,289 INFO L93 Difference]: Finished difference Result 119 states and 238 transitions. [2021-07-13 19:28:31,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:28:31,290 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 [2021-07-13 19:28:31,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:31,290 INFO L225 Difference]: With dead ends: 119 [2021-07-13 19:28:31,290 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:28:31,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 742.0ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:28:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:28:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 88. [2021-07-13 19:28:31,292 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) [2021-07-13 19:28:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 187 transitions. [2021-07-13 19:28:31,292 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 187 transitions. Word has length 16 [2021-07-13 19:28:31,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:31,292 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 187 transitions. [2021-07-13 19:28:31,292 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) [2021-07-13 19:28:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 187 transitions. [2021-07-13 19:28:31,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:31,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:31,293 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:31,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:31,502 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:31,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:31,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1062737625, now seen corresponding path program 44 times [2021-07-13 19:28:31,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:31,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283356848] [2021-07-13 19:28:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:31,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:31,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283356848] [2021-07-13 19:28:31,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283356848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:31,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898339528] [2021-07-13 19:28:31,643 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 [2021-07-13 19:28:31,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:31,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:31,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:31,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:31,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898339528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:31,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:31,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:31,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107690163] [2021-07-13 19:28:31,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:31,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:31,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:31,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:31,990 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) [2021-07-13 19:28:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:32,496 INFO L93 Difference]: Finished difference Result 144 states and 276 transitions. [2021-07-13 19:28:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:32,497 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 [2021-07-13 19:28:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:32,497 INFO L225 Difference]: With dead ends: 144 [2021-07-13 19:28:32,497 INFO L226 Difference]: Without dead ends: 118 [2021-07-13 19:28:32,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 702.4ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:28:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-13 19:28:32,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2021-07-13 19:28:32,499 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) [2021-07-13 19:28:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 187 transitions. [2021-07-13 19:28:32,499 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 187 transitions. Word has length 16 [2021-07-13 19:28:32,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:32,500 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 187 transitions. [2021-07-13 19:28:32,500 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) [2021-07-13 19:28:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 187 transitions. [2021-07-13 19:28:32,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:32,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:32,500 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:32,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:32,715 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:32,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:32,715 INFO L82 PathProgramCache]: Analyzing trace with hash 234492561, now seen corresponding path program 45 times [2021-07-13 19:28:32,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:32,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050094170] [2021-07-13 19:28:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:32,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:32,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050094170] [2021-07-13 19:28:32,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050094170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:32,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982968731] [2021-07-13 19:28:32,881 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 [2021-07-13 19:28:32,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:28:32,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:32,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:32,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:33,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982968731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:33,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:33,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:33,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529635116] [2021-07-13 19:28:33,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:33,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:33,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:33,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:33,221 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) [2021-07-13 19:28:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:33,903 INFO L93 Difference]: Finished difference Result 141 states and 272 transitions. [2021-07-13 19:28:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:28:33,904 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 [2021-07-13 19:28:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:33,904 INFO L225 Difference]: With dead ends: 141 [2021-07-13 19:28:33,904 INFO L226 Difference]: Without dead ends: 116 [2021-07-13 19:28:33,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 892.4ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:28:33,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-13 19:28:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 91. [2021-07-13 19:28:33,906 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) [2021-07-13 19:28:33,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 195 transitions. [2021-07-13 19:28:33,906 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 195 transitions. Word has length 16 [2021-07-13 19:28:33,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:33,906 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 195 transitions. [2021-07-13 19:28:33,906 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) [2021-07-13 19:28:33,906 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 195 transitions. [2021-07-13 19:28:33,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:33,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:33,907 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:34,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:34,117 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:34,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1031228313, now seen corresponding path program 46 times [2021-07-13 19:28:34,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:34,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309169253] [2021-07-13 19:28:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:34,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:34,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309169253] [2021-07-13 19:28:34,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309169253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:34,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145024615] [2021-07-13 19:28:34,232 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 [2021-07-13 19:28:34,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:34,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:34,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:34,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:34,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145024615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:34,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:34,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:34,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566058206] [2021-07-13 19:28:34,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:34,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:34,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:34,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:34,594 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) [2021-07-13 19:28:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:34,987 INFO L93 Difference]: Finished difference Result 150 states and 295 transitions. [2021-07-13 19:28:34,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:28:34,988 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 [2021-07-13 19:28:34,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:34,988 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:28:34,988 INFO L226 Difference]: Without dead ends: 124 [2021-07-13 19:28:34,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 571.5ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:28:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-07-13 19:28:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2021-07-13 19:28:34,990 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) [2021-07-13 19:28:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-07-13 19:28:34,991 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 16 [2021-07-13 19:28:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:34,991 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-07-13 19:28:34,991 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) [2021-07-13 19:28:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-07-13 19:28:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:34,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:34,991 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:35,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-07-13 19:28:35,209 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:35,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1248642377, now seen corresponding path program 47 times [2021-07-13 19:28:35,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:35,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136189504] [2021-07-13 19:28:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:35,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:35,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136189504] [2021-07-13 19:28:35,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136189504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:35,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100247452] [2021-07-13 19:28:35,418 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 [2021-07-13 19:28:35,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:28:35,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:35,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:35,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:35,640 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-07-13 19:28:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:35,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100247452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:35,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:35,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:35,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942649476] [2021-07-13 19:28:35,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:35,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:35,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:35,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:35,753 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) [2021-07-13 19:28:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:36,288 INFO L93 Difference]: Finished difference Result 176 states and 339 transitions. [2021-07-13 19:28:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:36,288 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 [2021-07-13 19:28:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:36,289 INFO L225 Difference]: With dead ends: 176 [2021-07-13 19:28:36,289 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 19:28:36,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 812.3ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:28:36,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 19:28:36,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 97. [2021-07-13 19:28:36,291 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) [2021-07-13 19:28:36,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-07-13 19:28:36,291 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 16 [2021-07-13 19:28:36,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:36,291 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-07-13 19:28:36,291 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) [2021-07-13 19:28:36,291 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-07-13 19:28:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:36,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:36,292 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:36,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:36,505 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:36,505 INFO L82 PathProgramCache]: Analyzing trace with hash -565135694, now seen corresponding path program 48 times [2021-07-13 19:28:36,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:36,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426007678] [2021-07-13 19:28:36,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:28:36,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:36,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426007678] [2021-07-13 19:28:36,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426007678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:36,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595278402] [2021-07-13 19:28:36,548 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 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 [2021-07-13 19:28:36,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:28:36,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:36,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:36,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:28:36,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595278402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:36,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:36,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:36,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288721494] [2021-07-13 19:28:36,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:36,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:36,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:36,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:36,711 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) [2021-07-13 19:28:36,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:36,751 INFO L93 Difference]: Finished difference Result 99 states and 210 transitions. [2021-07-13 19:28:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:28:36,751 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 [2021-07-13 19:28:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:36,752 INFO L225 Difference]: With dead ends: 99 [2021-07-13 19:28:36,752 INFO L226 Difference]: Without dead ends: 99 [2021-07-13 19:28:36,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-13 19:28:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2021-07-13 19:28:36,753 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) [2021-07-13 19:28:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 185 transitions. [2021-07-13 19:28:36,754 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 185 transitions. Word has length 16 [2021-07-13 19:28:36,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:36,754 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 185 transitions. [2021-07-13 19:28:36,754 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) [2021-07-13 19:28:36,754 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 185 transitions. [2021-07-13 19:28:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:36,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:36,754 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:36,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:36,967 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:36,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:36,967 INFO L82 PathProgramCache]: Analyzing trace with hash 85948953, now seen corresponding path program 49 times [2021-07-13 19:28:36,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:36,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450255198] [2021-07-13 19:28:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:37,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:37,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450255198] [2021-07-13 19:28:37,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450255198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:37,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993198299] [2021-07-13 19:28:37,132 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 [2021-07-13 19:28:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:37,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:37,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:37,356 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-07-13 19:28:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:37,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993198299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:37,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:37,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:37,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77114106] [2021-07-13 19:28:37,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:37,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:37,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:37,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:37,449 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) [2021-07-13 19:28:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:37,986 INFO L93 Difference]: Finished difference Result 159 states and 305 transitions. [2021-07-13 19:28:37,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:28:37,987 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 [2021-07-13 19:28:37,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:37,987 INFO L225 Difference]: With dead ends: 159 [2021-07-13 19:28:37,987 INFO L226 Difference]: Without dead ends: 140 [2021-07-13 19:28:37,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 733.1ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:28:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-07-13 19:28:37,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 89. [2021-07-13 19:28:37,989 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) [2021-07-13 19:28:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 195 transitions. [2021-07-13 19:28:37,989 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 195 transitions. Word has length 16 [2021-07-13 19:28:37,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:37,990 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 195 transitions. [2021-07-13 19:28:37,990 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) [2021-07-13 19:28:37,990 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 195 transitions. [2021-07-13 19:28:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:37,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:37,990 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:38,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:38,205 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:38,205 INFO L82 PathProgramCache]: Analyzing trace with hash -451906625, now seen corresponding path program 50 times [2021-07-13 19:28:38,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:38,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007745179] [2021-07-13 19:28:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:38,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:38,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007745179] [2021-07-13 19:28:38,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007745179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:38,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511124835] [2021-07-13 19:28:38,326 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 [2021-07-13 19:28:38,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:38,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:38,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:38,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:38,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511124835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:38,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:38,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:38,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218172499] [2021-07-13 19:28:38,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:38,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:38,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:38,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:38,629 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) [2021-07-13 19:28:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:39,273 INFO L93 Difference]: Finished difference Result 146 states and 293 transitions. [2021-07-13 19:28:39,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:39,274 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 [2021-07-13 19:28:39,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:39,274 INFO L225 Difference]: With dead ends: 146 [2021-07-13 19:28:39,274 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:28:39,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 794.5ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:28:39,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:28:39,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2021-07-13 19:28:39,276 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) [2021-07-13 19:28:39,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 195 transitions. [2021-07-13 19:28:39,279 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 195 transitions. Word has length 16 [2021-07-13 19:28:39,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:39,279 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 195 transitions. [2021-07-13 19:28:39,279 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) [2021-07-13 19:28:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 195 transitions. [2021-07-13 19:28:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:39,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:39,279 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:39,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:39,497 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:39,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:39,497 INFO L82 PathProgramCache]: Analyzing trace with hash 54439641, now seen corresponding path program 51 times [2021-07-13 19:28:39,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:39,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650280604] [2021-07-13 19:28:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:39,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:39,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650280604] [2021-07-13 19:28:39,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650280604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:39,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081561975] [2021-07-13 19:28:39,624 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 [2021-07-13 19:28:39,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:28:39,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:39,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:39,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:39,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081561975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:39,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:39,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:39,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532530164] [2021-07-13 19:28:39,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:39,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:39,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:39,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:39,979 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) [2021-07-13 19:28:40,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:40,725 INFO L93 Difference]: Finished difference Result 184 states and 344 transitions. [2021-07-13 19:28:40,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:28:40,725 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 [2021-07-13 19:28:40,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:40,726 INFO L225 Difference]: With dead ends: 184 [2021-07-13 19:28:40,726 INFO L226 Difference]: Without dead ends: 149 [2021-07-13 19:28:40,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 888.5ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:28:40,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-13 19:28:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 91. [2021-07-13 19:28:40,728 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) [2021-07-13 19:28:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 199 transitions. [2021-07-13 19:28:40,728 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 199 transitions. Word has length 16 [2021-07-13 19:28:40,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:40,728 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 199 transitions. [2021-07-13 19:28:40,728 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) [2021-07-13 19:28:40,728 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 199 transitions. [2021-07-13 19:28:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:40,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:40,728 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:40,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-07-13 19:28:40,945 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2140856799, now seen corresponding path program 52 times [2021-07-13 19:28:40,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:40,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921480386] [2021-07-13 19:28:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:41,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:41,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921480386] [2021-07-13 19:28:41,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921480386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:41,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503361304] [2021-07-13 19:28:41,159 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 [2021-07-13 19:28:41,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:41,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:41,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:41,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:41,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503361304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:41,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:41,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:28:41,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052465386] [2021-07-13 19:28:41,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:28:41,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:41,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:28:41,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:28:41,410 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) [2021-07-13 19:28:41,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:41,756 INFO L93 Difference]: Finished difference Result 107 states and 224 transitions. [2021-07-13 19:28:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:28:41,756 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 [2021-07-13 19:28:41,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:41,757 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:28:41,757 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 19:28:41,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 595.0ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:28:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 19:28:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2021-07-13 19:28:41,759 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) [2021-07-13 19:28:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-07-13 19:28:41,759 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 16 [2021-07-13 19:28:41,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:41,759 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-07-13 19:28:41,759 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) [2021-07-13 19:28:41,759 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-07-13 19:28:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:41,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:41,759 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:41,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-07-13 19:28:41,969 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:41,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:41,969 INFO L82 PathProgramCache]: Analyzing trace with hash 576768767, now seen corresponding path program 53 times [2021-07-13 19:28:41,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:41,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532512117] [2021-07-13 19:28:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:42,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:42,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532512117] [2021-07-13 19:28:42,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532512117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:42,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635254160] [2021-07-13 19:28:42,116 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 [2021-07-13 19:28:42,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:42,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:42,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:42,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:42,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635254160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:42,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:42,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:42,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188820715] [2021-07-13 19:28:42,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:42,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:42,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:42,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:42,363 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) [2021-07-13 19:28:42,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:42,954 INFO L93 Difference]: Finished difference Result 138 states and 276 transitions. [2021-07-13 19:28:42,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:42,954 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 [2021-07-13 19:28:42,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:42,955 INFO L225 Difference]: With dead ends: 138 [2021-07-13 19:28:42,955 INFO L226 Difference]: Without dead ends: 131 [2021-07-13 19:28:42,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 714.1ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:28:42,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-13 19:28:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 95. [2021-07-13 19:28:42,956 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) [2021-07-13 19:28:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 208 transitions. [2021-07-13 19:28:42,957 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 208 transitions. Word has length 16 [2021-07-13 19:28:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:42,957 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 208 transitions. [2021-07-13 19:28:42,957 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) [2021-07-13 19:28:42,957 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 208 transitions. [2021-07-13 19:28:42,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:42,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:42,957 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:43,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-07-13 19:28:43,173 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:43,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:43,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1911360097, now seen corresponding path program 54 times [2021-07-13 19:28:43,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:43,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937156708] [2021-07-13 19:28:43,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:43,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:43,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937156708] [2021-07-13 19:28:43,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937156708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:43,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179214493] [2021-07-13 19:28:43,299 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 [2021-07-13 19:28:43,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:28:43,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:43,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:43,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:43,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179214493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:43,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:43,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:43,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718783614] [2021-07-13 19:28:43,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:43,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:43,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:43,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:43,632 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) [2021-07-13 19:28:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:44,083 INFO L93 Difference]: Finished difference Result 146 states and 288 transitions. [2021-07-13 19:28:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:28:44,083 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 [2021-07-13 19:28:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:44,083 INFO L225 Difference]: With dead ends: 146 [2021-07-13 19:28:44,083 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:28:44,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 635.9ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:28:44,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:28:44,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2021-07-13 19:28:44,085 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) [2021-07-13 19:28:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-07-13 19:28:44,086 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 16 [2021-07-13 19:28:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:44,086 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-07-13 19:28:44,086 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) [2021-07-13 19:28:44,086 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-07-13 19:28:44,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:44,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:44,086 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:44,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-07-13 19:28:44,287 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:44,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:44,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1290310270, now seen corresponding path program 55 times [2021-07-13 19:28:44,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:44,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933860544] [2021-07-13 19:28:44,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:28:44,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:44,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933860544] [2021-07-13 19:28:44,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933860544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:44,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883700787] [2021-07-13 19:28:44,328 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 [2021-07-13 19:28:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:44,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:44,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:28:44,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883700787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:44,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:44,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:44,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766228613] [2021-07-13 19:28:44,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:44,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:44,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:44,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:44,415 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) [2021-07-13 19:28:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:44,486 INFO L93 Difference]: Finished difference Result 112 states and 241 transitions. [2021-07-13 19:28:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:28:44,487 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 [2021-07-13 19:28:44,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:44,487 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:28:44,487 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:28:44,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:28:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:28:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2021-07-13 19:28:44,489 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) [2021-07-13 19:28:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 203 transitions. [2021-07-13 19:28:44,489 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 203 transitions. Word has length 16 [2021-07-13 19:28:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:44,489 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 203 transitions. [2021-07-13 19:28:44,489 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) [2021-07-13 19:28:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 203 transitions. [2021-07-13 19:28:44,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:44,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:44,489 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:44,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:44,697 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:44,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:44,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1083115033, now seen corresponding path program 56 times [2021-07-13 19:28:44,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:44,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102191498] [2021-07-13 19:28:44,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:44,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:44,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102191498] [2021-07-13 19:28:44,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102191498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:44,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904789443] [2021-07-13 19:28:44,838 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 [2021-07-13 19:28:44,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:44,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:44,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:44,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:45,055 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-07-13 19:28:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:45,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904789443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:45,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:45,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:45,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715722746] [2021-07-13 19:28:45,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:45,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:45,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:45,173 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) [2021-07-13 19:28:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:45,699 INFO L93 Difference]: Finished difference Result 152 states and 301 transitions. [2021-07-13 19:28:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:45,699 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 [2021-07-13 19:28:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:45,700 INFO L225 Difference]: With dead ends: 152 [2021-07-13 19:28:45,700 INFO L226 Difference]: Without dead ends: 132 [2021-07-13 19:28:45,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 745.0ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:28:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-07-13 19:28:45,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2021-07-13 19:28:45,702 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) [2021-07-13 19:28:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 214 transitions. [2021-07-13 19:28:45,702 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 214 transitions. Word has length 16 [2021-07-13 19:28:45,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:45,702 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 214 transitions. [2021-07-13 19:28:45,702 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) [2021-07-13 19:28:45,702 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 214 transitions. [2021-07-13 19:28:45,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:45,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:45,702 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:45,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:45,917 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:45,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:45,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1877260933, now seen corresponding path program 57 times [2021-07-13 19:28:45,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:45,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141033906] [2021-07-13 19:28:45,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:46,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:46,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141033906] [2021-07-13 19:28:46,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141033906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:46,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401962211] [2021-07-13 19:28:46,034 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 [2021-07-13 19:28:46,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:28:46,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:46,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:46,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:46,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401962211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:46,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:46,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:46,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618627138] [2021-07-13 19:28:46,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:46,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:46,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:46,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:46,363 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) [2021-07-13 19:28:46,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:46,775 INFO L93 Difference]: Finished difference Result 148 states and 293 transitions. [2021-07-13 19:28:46,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:28:46,775 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 [2021-07-13 19:28:46,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:46,775 INFO L225 Difference]: With dead ends: 148 [2021-07-13 19:28:46,776 INFO L226 Difference]: Without dead ends: 127 [2021-07-13 19:28:46,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 582.5ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:28:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-13 19:28:46,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-07-13 19:28:46,777 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) [2021-07-13 19:28:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-07-13 19:28:46,778 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 16 [2021-07-13 19:28:46,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:46,778 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-07-13 19:28:46,778 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) [2021-07-13 19:28:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-07-13 19:28:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:46,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:46,778 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:46,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:46,993 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:46,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1879850785, now seen corresponding path program 58 times [2021-07-13 19:28:46,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:46,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074813842] [2021-07-13 19:28:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:47,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:47,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074813842] [2021-07-13 19:28:47,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074813842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:47,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486009520] [2021-07-13 19:28:47,105 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 [2021-07-13 19:28:47,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:47,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:47,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:47,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:47,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486009520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:47,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:47,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:47,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74492627] [2021-07-13 19:28:47,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:47,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:47,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:47,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:47,394 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) [2021-07-13 19:28:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:47,980 INFO L93 Difference]: Finished difference Result 171 states and 342 transitions. [2021-07-13 19:28:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:28:47,980 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 [2021-07-13 19:28:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:47,981 INFO L225 Difference]: With dead ends: 171 [2021-07-13 19:28:47,981 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:28:47,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 714.1ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:28:47,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:28:47,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 100. [2021-07-13 19:28:47,983 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) [2021-07-13 19:28:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 221 transitions. [2021-07-13 19:28:47,983 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 221 transitions. Word has length 16 [2021-07-13 19:28:47,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:47,983 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 221 transitions. [2021-07-13 19:28:47,983 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) [2021-07-13 19:28:47,983 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 221 transitions. [2021-07-13 19:28:47,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:47,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:47,984 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:48,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-07-13 19:28:48,184 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:48,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:48,184 INFO L82 PathProgramCache]: Analyzing trace with hash -400019905, now seen corresponding path program 59 times [2021-07-13 19:28:48,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:48,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242259626] [2021-07-13 19:28:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:48,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:48,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242259626] [2021-07-13 19:28:48,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242259626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:48,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976277958] [2021-07-13 19:28:48,350 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 [2021-07-13 19:28:48,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:28:48,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:48,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:48,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:48,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976277958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:48,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:48,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:48,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344707947] [2021-07-13 19:28:48,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:48,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:48,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:48,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:48,652 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) [2021-07-13 19:28:48,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:48,984 INFO L93 Difference]: Finished difference Result 131 states and 273 transitions. [2021-07-13 19:28:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:28:48,984 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 [2021-07-13 19:28:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:48,985 INFO L225 Difference]: With dead ends: 131 [2021-07-13 19:28:48,985 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:28:48,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 567.8ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:28:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:28:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-07-13 19:28:48,987 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) [2021-07-13 19:28:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 225 transitions. [2021-07-13 19:28:48,987 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 225 transitions. Word has length 16 [2021-07-13 19:28:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:48,987 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 225 transitions. [2021-07-13 19:28:48,987 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) [2021-07-13 19:28:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 225 transitions. [2021-07-13 19:28:48,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:48,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:48,987 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:49,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:49,201 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:49,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:49,201 INFO L82 PathProgramCache]: Analyzing trace with hash 934571425, now seen corresponding path program 60 times [2021-07-13 19:28:49,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:49,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150052284] [2021-07-13 19:28:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:49,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:49,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150052284] [2021-07-13 19:28:49,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150052284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:49,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117751446] [2021-07-13 19:28:49,352 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 [2021-07-13 19:28:49,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:28:49,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:49,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:49,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:49,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117751446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:49,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:49,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:49,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694661706] [2021-07-13 19:28:49,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:49,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:49,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:49,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:49,586 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) [2021-07-13 19:28:50,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:50,235 INFO L93 Difference]: Finished difference Result 178 states and 347 transitions. [2021-07-13 19:28:50,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:28:50,235 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 [2021-07-13 19:28:50,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:50,236 INFO L225 Difference]: With dead ends: 178 [2021-07-13 19:28:50,236 INFO L226 Difference]: Without dead ends: 159 [2021-07-13 19:28:50,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 728.4ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:28:50,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-13 19:28:50,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2021-07-13 19:28:50,238 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) [2021-07-13 19:28:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 231 transitions. [2021-07-13 19:28:50,238 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 231 transitions. Word has length 16 [2021-07-13 19:28:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:50,238 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 231 transitions. [2021-07-13 19:28:50,238 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) [2021-07-13 19:28:50,238 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 231 transitions. [2021-07-13 19:28:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:50,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:50,239 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:50,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-07-13 19:28:50,456 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:50,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:50,456 INFO L82 PathProgramCache]: Analyzing trace with hash 396715847, now seen corresponding path program 61 times [2021-07-13 19:28:50,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:50,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653042798] [2021-07-13 19:28:50,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:50,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:50,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653042798] [2021-07-13 19:28:50,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653042798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:50,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583192689] [2021-07-13 19:28:50,580 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 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 [2021-07-13 19:28:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:50,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:50,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:50,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583192689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:50,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:50,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:50,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742056839] [2021-07-13 19:28:50,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:50,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:50,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:50,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:50,894 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) [2021-07-13 19:28:51,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:51,440 INFO L93 Difference]: Finished difference Result 161 states and 329 transitions. [2021-07-13 19:28:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:28:51,440 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 [2021-07-13 19:28:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:51,441 INFO L225 Difference]: With dead ends: 161 [2021-07-13 19:28:51,441 INFO L226 Difference]: Without dead ends: 132 [2021-07-13 19:28:51,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 714.8ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:28:51,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-07-13 19:28:51,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-07-13 19:28:51,444 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) [2021-07-13 19:28:51,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 240 transitions. [2021-07-13 19:28:51,444 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 240 transitions. Word has length 16 [2021-07-13 19:28:51,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:51,445 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 240 transitions. [2021-07-13 19:28:51,445 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) [2021-07-13 19:28:51,445 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 240 transitions. [2021-07-13 19:28:51,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:51,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:51,445 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:51,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:51,661 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:51,662 INFO L82 PathProgramCache]: Analyzing trace with hash 189520610, now seen corresponding path program 62 times [2021-07-13 19:28:51,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:51,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333523106] [2021-07-13 19:28:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:28:51,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:51,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333523106] [2021-07-13 19:28:51,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333523106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:51,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138014824] [2021-07-13 19:28:51,706 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 [2021-07-13 19:28:51,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:51,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:51,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:51,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:28:51,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138014824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:51,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:51,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:51,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191147980] [2021-07-13 19:28:51,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:51,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:51,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:51,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:51,805 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) [2021-07-13 19:28:51,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:51,935 INFO L93 Difference]: Finished difference Result 163 states and 332 transitions. [2021-07-13 19:28:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:28:51,936 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 [2021-07-13 19:28:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:51,936 INFO L225 Difference]: With dead ends: 163 [2021-07-13 19:28:51,936 INFO L226 Difference]: Without dead ends: 163 [2021-07-13 19:28:51,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:28:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-13 19:28:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2021-07-13 19:28:51,938 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) [2021-07-13 19:28:51,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 250 transitions. [2021-07-13 19:28:51,939 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 250 transitions. Word has length 16 [2021-07-13 19:28:51,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:51,939 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 250 transitions. [2021-07-13 19:28:51,939 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) [2021-07-13 19:28:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 250 transitions. [2021-07-13 19:28:51,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:51,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:51,939 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:52,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-07-13 19:28:52,156 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:52,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:52,156 INFO L82 PathProgramCache]: Analyzing trace with hash 903062113, now seen corresponding path program 63 times [2021-07-13 19:28:52,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:52,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75169132] [2021-07-13 19:28:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:52,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:52,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75169132] [2021-07-13 19:28:52,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75169132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:52,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723480786] [2021-07-13 19:28:52,271 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 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 [2021-07-13 19:28:52,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:28:52,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:52,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:52,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:52,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723480786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:52,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:52,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:52,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988191013] [2021-07-13 19:28:52,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:52,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:52,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:52,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:52,577 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) [2021-07-13 19:28:53,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:53,952 INFO L93 Difference]: Finished difference Result 219 states and 429 transitions. [2021-07-13 19:28:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:28:53,952 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 [2021-07-13 19:28:53,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:53,953 INFO L225 Difference]: With dead ends: 219 [2021-07-13 19:28:53,953 INFO L226 Difference]: Without dead ends: 151 [2021-07-13 19:28:53,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1513.5ms TimeCoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:28:53,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-13 19:28:53,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2021-07-13 19:28:53,955 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) [2021-07-13 19:28:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 260 transitions. [2021-07-13 19:28:53,955 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 260 transitions. Word has length 16 [2021-07-13 19:28:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:53,955 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 260 transitions. [2021-07-13 19:28:53,955 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) [2021-07-13 19:28:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 260 transitions. [2021-07-13 19:28:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:53,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:53,955 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:54,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-13 19:28:54,173 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:54,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:54,173 INFO L82 PathProgramCache]: Analyzing trace with hash 695866876, now seen corresponding path program 64 times [2021-07-13 19:28:54,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:54,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880495836] [2021-07-13 19:28:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:28:54,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:54,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880495836] [2021-07-13 19:28:54,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880495836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:54,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248919115] [2021-07-13 19:28:54,215 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 [2021-07-13 19:28:54,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:28:54,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:54,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:28:54,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:28:54,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248919115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:54,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:54,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:28:54,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313311823] [2021-07-13 19:28:54,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:28:54,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:54,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:28:54,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:54,306 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) [2021-07-13 19:28:54,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:54,352 INFO L93 Difference]: Finished difference Result 127 states and 279 transitions. [2021-07-13 19:28:54,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:28:54,352 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 [2021-07-13 19:28:54,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:54,352 INFO L225 Difference]: With dead ends: 127 [2021-07-13 19:28:54,353 INFO L226 Difference]: Without dead ends: 127 [2021-07-13 19:28:54,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:28:54,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-13 19:28:54,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2021-07-13 19:28:54,354 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) [2021-07-13 19:28:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 252 transitions. [2021-07-13 19:28:54,354 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 252 transitions. Word has length 16 [2021-07-13 19:28:54,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:54,355 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 252 transitions. [2021-07-13 19:28:54,355 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) [2021-07-13 19:28:54,355 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 252 transitions. [2021-07-13 19:28:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:54,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:54,355 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:54,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-13 19:28:54,573 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash 444951547, now seen corresponding path program 65 times [2021-07-13 19:28:54,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:54,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520721291] [2021-07-13 19:28:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:54,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:54,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520721291] [2021-07-13 19:28:54,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520721291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:54,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870105500] [2021-07-13 19:28:54,796 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 [2021-07-13 19:28:54,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:28:54,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:54,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:54,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:55,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870105500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:55,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:55,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:55,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832245739] [2021-07-13 19:28:55,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:55,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:55,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:55,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:55,104 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) [2021-07-13 19:28:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:55,399 INFO L93 Difference]: Finished difference Result 149 states and 313 transitions. [2021-07-13 19:28:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:28:55,400 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 [2021-07-13 19:28:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:55,400 INFO L225 Difference]: With dead ends: 149 [2021-07-13 19:28:55,400 INFO L226 Difference]: Without dead ends: 138 [2021-07-13 19:28:55,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 584.3ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:28:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-13 19:28:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 115. [2021-07-13 19:28:55,402 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) [2021-07-13 19:28:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 256 transitions. [2021-07-13 19:28:55,402 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 256 transitions. Word has length 16 [2021-07-13 19:28:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:55,403 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 256 transitions. [2021-07-13 19:28:55,403 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) [2021-07-13 19:28:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 256 transitions. [2021-07-13 19:28:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:55,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:55,403 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:55,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-13 19:28:55,617 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:55,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1779542877, now seen corresponding path program 66 times [2021-07-13 19:28:55,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:55,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785291962] [2021-07-13 19:28:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:55,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:55,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785291962] [2021-07-13 19:28:55,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785291962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:55,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164784634] [2021-07-13 19:28:55,781 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 [2021-07-13 19:28:55,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:28:55,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:55,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:55,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:56,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164784634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:56,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:56,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:56,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160108627] [2021-07-13 19:28:56,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:56,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:56,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:56,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:56,098 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) [2021-07-13 19:28:56,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:56,472 INFO L93 Difference]: Finished difference Result 160 states and 331 transitions. [2021-07-13 19:28:56,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:28:56,472 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 [2021-07-13 19:28:56,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:56,473 INFO L225 Difference]: With dead ends: 160 [2021-07-13 19:28:56,473 INFO L226 Difference]: Without dead ends: 141 [2021-07-13 19:28:56,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:28:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-13 19:28:56,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2021-07-13 19:28:56,474 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) [2021-07-13 19:28:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-07-13 19:28:56,475 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-07-13 19:28:56,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:56,475 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-07-13 19:28:56,475 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) [2021-07-13 19:28:56,475 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-07-13 19:28:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:56,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:56,475 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:56,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-07-13 19:28:56,692 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:56,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:56,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1241687299, now seen corresponding path program 67 times [2021-07-13 19:28:56,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:56,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247701034] [2021-07-13 19:28:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:56,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:56,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247701034] [2021-07-13 19:28:56,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247701034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:56,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49481848] [2021-07-13 19:28:56,817 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 [2021-07-13 19:28:56,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:56,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:56,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:57,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49481848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:57,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:57,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:57,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704035250] [2021-07-13 19:28:57,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:57,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:57,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:57,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:57,113 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) [2021-07-13 19:28:57,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:57,654 INFO L93 Difference]: Finished difference Result 167 states and 349 transitions. [2021-07-13 19:28:57,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:28:57,654 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 [2021-07-13 19:28:57,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:57,655 INFO L225 Difference]: With dead ends: 167 [2021-07-13 19:28:57,655 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:28:57,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 680.3ms TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:28:57,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:28:57,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 114. [2021-07-13 19:28:57,657 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) [2021-07-13 19:28:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-07-13 19:28:57,657 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-07-13 19:28:57,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:57,657 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-07-13 19:28:57,657 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) [2021-07-13 19:28:57,657 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-07-13 19:28:57,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:57,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:57,657 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:57,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:57,858 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1748033565, now seen corresponding path program 68 times [2021-07-13 19:28:57,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:57,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712372850] [2021-07-13 19:28:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:57,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:57,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712372850] [2021-07-13 19:28:57,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712372850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:57,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629315005] [2021-07-13 19:28:57,984 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 [2021-07-13 19:28:58,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:28:58,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:58,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:28:58,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:58,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629315005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:58,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:58,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:58,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358864874] [2021-07-13 19:28:58,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:58,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:58,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:58,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:58,303 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) [2021-07-13 19:28:58,942 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-07-13 19:28:59,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:28:59,012 INFO L93 Difference]: Finished difference Result 201 states and 395 transitions. [2021-07-13 19:28:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:28:59,012 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 [2021-07-13 19:28:59,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:28:59,013 INFO L225 Difference]: With dead ends: 201 [2021-07-13 19:28:59,013 INFO L226 Difference]: Without dead ends: 166 [2021-07-13 19:28:59,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 837.4ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:28:59,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-13 19:28:59,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2021-07-13 19:28:59,015 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) [2021-07-13 19:28:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-07-13 19:28:59,015 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-07-13 19:28:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:28:59,015 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-07-13 19:28:59,015 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) [2021-07-13 19:28:59,015 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-07-13 19:28:59,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:28:59,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:28:59,016 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:28:59,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:28:59,216 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:28:59,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:28:59,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2104034591, now seen corresponding path program 69 times [2021-07-13 19:28:59,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:28:59,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987912568] [2021-07-13 19:28:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:28:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:28:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:59,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:28:59,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987912568] [2021-07-13 19:28:59,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987912568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:59,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214808687] [2021-07-13 19:28:59,339 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 [2021-07-13 19:28:59,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:28:59,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:28:59,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:28:59,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:28:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:28:59,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214808687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:28:59,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:28:59,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:28:59,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018806894] [2021-07-13 19:28:59,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:28:59,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:28:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:28:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:28:59,684 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) [2021-07-13 19:29:00,103 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-07-13 19:29:00,418 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-07-13 19:29:00,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:00,443 INFO L93 Difference]: Finished difference Result 187 states and 386 transitions. [2021-07-13 19:29:00,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:29:00,444 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 [2021-07-13 19:29:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:00,444 INFO L225 Difference]: With dead ends: 187 [2021-07-13 19:29:00,444 INFO L226 Difference]: Without dead ends: 156 [2021-07-13 19:29:00,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 948.4ms TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:29:00,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-13 19:29:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2021-07-13 19:29:00,448 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) [2021-07-13 19:29:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 260 transitions. [2021-07-13 19:29:00,448 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 260 transitions. Word has length 16 [2021-07-13 19:29:00,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:00,448 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 260 transitions. [2021-07-13 19:29:00,448 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) [2021-07-13 19:29:00,448 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 260 transitions. [2021-07-13 19:29:00,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:00,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:00,449 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:00,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:00,652 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:00,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash -570507776, now seen corresponding path program 70 times [2021-07-13 19:29:00,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:00,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300511200] [2021-07-13 19:29:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:00,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:00,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300511200] [2021-07-13 19:29:00,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300511200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:00,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905195607] [2021-07-13 19:29:00,719 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 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 [2021-07-13 19:29:00,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:00,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:00,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:00,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:00,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905195607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:00,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:00,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:29:00,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270771020] [2021-07-13 19:29:00,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:29:00,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:00,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:29:00,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:29:00,843 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) [2021-07-13 19:29:00,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:00,938 INFO L93 Difference]: Finished difference Result 159 states and 338 transitions. [2021-07-13 19:29:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:29:00,938 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 [2021-07-13 19:29:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:00,938 INFO L225 Difference]: With dead ends: 159 [2021-07-13 19:29:00,939 INFO L226 Difference]: Without dead ends: 159 [2021-07-13 19:29:00,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-13 19:29:00,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2021-07-13 19:29:00,940 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) [2021-07-13 19:29:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-07-13 19:29:00,940 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-07-13 19:29:00,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:00,941 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-07-13 19:29:00,941 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) [2021-07-13 19:29:00,941 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-07-13 19:29:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:00,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:00,941 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:01,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-07-13 19:29:01,142 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:01,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:01,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1010264140, now seen corresponding path program 71 times [2021-07-13 19:29:01,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:01,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802952874] [2021-07-13 19:29:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:01,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:01,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802952874] [2021-07-13 19:29:01,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802952874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:01,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070493978] [2021-07-13 19:29:01,236 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 [2021-07-13 19:29:01,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:29:01,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:01,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:01,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:01,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070493978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:01,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:01,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:01,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605700680] [2021-07-13 19:29:01,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:01,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:01,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:01,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:01,426 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) [2021-07-13 19:29:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:01,748 INFO L93 Difference]: Finished difference Result 174 states and 368 transitions. [2021-07-13 19:29:01,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:01,751 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 [2021-07-13 19:29:01,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:01,752 INFO L225 Difference]: With dead ends: 174 [2021-07-13 19:29:01,752 INFO L226 Difference]: Without dead ends: 174 [2021-07-13 19:29:01,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:29:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-13 19:29:01,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 118. [2021-07-13 19:29:01,753 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) [2021-07-13 19:29:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-07-13 19:29:01,754 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-07-13 19:29:01,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:01,754 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-07-13 19:29:01,754 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) [2021-07-13 19:29:01,754 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-07-13 19:29:01,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:01,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:01,754 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:01,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-13 19:29:01,970 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:01,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:01,970 INFO L82 PathProgramCache]: Analyzing trace with hash -60731324, now seen corresponding path program 72 times [2021-07-13 19:29:01,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:01,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225938826] [2021-07-13 19:29:01,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:02,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:02,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225938826] [2021-07-13 19:29:02,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225938826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:02,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774883300] [2021-07-13 19:29:02,036 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 [2021-07-13 19:29:02,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:02,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:02,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:02,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:02,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774883300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:02,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:02,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:02,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935433348] [2021-07-13 19:29:02,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:02,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:02,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:02,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:02,195 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) [2021-07-13 19:29:02,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:02,374 INFO L93 Difference]: Finished difference Result 168 states and 356 transitions. [2021-07-13 19:29:02,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:02,375 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 [2021-07-13 19:29:02,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:02,375 INFO L225 Difference]: With dead ends: 168 [2021-07-13 19:29:02,375 INFO L226 Difference]: Without dead ends: 168 [2021-07-13 19:29:02,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-13 19:29:02,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 118. [2021-07-13 19:29:02,377 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) [2021-07-13 19:29:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-07-13 19:29:02,377 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-07-13 19:29:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:02,377 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-07-13 19:29:02,378 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) [2021-07-13 19:29:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-07-13 19:29:02,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:02,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:02,378 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:02,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-07-13 19:29:02,593 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:02,593 INFO L82 PathProgramCache]: Analyzing trace with hash 736004428, now seen corresponding path program 73 times [2021-07-13 19:29:02,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:02,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601879412] [2021-07-13 19:29:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:02,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:02,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601879412] [2021-07-13 19:29:02,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601879412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:02,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426781130] [2021-07-13 19:29:02,654 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 [2021-07-13 19:29:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:02,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:02,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:02,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426781130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:02,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:02,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:02,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21628769] [2021-07-13 19:29:02,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:02,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:02,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:02,871 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) [2021-07-13 19:29:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:03,096 INFO L93 Difference]: Finished difference Result 170 states and 355 transitions. [2021-07-13 19:29:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:29:03,096 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 [2021-07-13 19:29:03,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:03,097 INFO L225 Difference]: With dead ends: 170 [2021-07-13 19:29:03,097 INFO L226 Difference]: Without dead ends: 167 [2021-07-13 19:29:03,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:29:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-13 19:29:03,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 118. [2021-07-13 19:29:03,099 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) [2021-07-13 19:29:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-07-13 19:29:03,099 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-07-13 19:29:03,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:03,099 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-07-13 19:29:03,099 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) [2021-07-13 19:29:03,099 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-07-13 19:29:03,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:03,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:03,100 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:03,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:03,309 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:03,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:03,309 INFO L82 PathProgramCache]: Analyzing trace with hash 528809191, now seen corresponding path program 74 times [2021-07-13 19:29:03,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:03,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758144932] [2021-07-13 19:29:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:03,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:03,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758144932] [2021-07-13 19:29:03,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758144932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:03,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831890794] [2021-07-13 19:29:03,367 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 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 [2021-07-13 19:29:03,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:03,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:03,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:03,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:03,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831890794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:03,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:03,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:03,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37419980] [2021-07-13 19:29:03,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:03,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:03,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:03,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:03,597 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) [2021-07-13 19:29:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:03,796 INFO L93 Difference]: Finished difference Result 170 states and 351 transitions. [2021-07-13 19:29:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:29:03,796 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 [2021-07-13 19:29:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:03,797 INFO L225 Difference]: With dead ends: 170 [2021-07-13 19:29:03,797 INFO L226 Difference]: Without dead ends: 168 [2021-07-13 19:29:03,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 326.7ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-13 19:29:03,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 122. [2021-07-13 19:29:03,799 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) [2021-07-13 19:29:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 272 transitions. [2021-07-13 19:29:03,799 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 272 transitions. Word has length 17 [2021-07-13 19:29:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:03,800 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 272 transitions. [2021-07-13 19:29:03,800 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) [2021-07-13 19:29:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 272 transitions. [2021-07-13 19:29:03,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:03,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:03,800 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:04,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-07-13 19:29:04,013 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:04,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:04,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1863400521, now seen corresponding path program 75 times [2021-07-13 19:29:04,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:04,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470228432] [2021-07-13 19:29:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:04,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:04,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470228432] [2021-07-13 19:29:04,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470228432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:04,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029437694] [2021-07-13 19:29:04,075 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 [2021-07-13 19:29:04,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:04,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:04,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:04,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:04,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029437694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:04,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:04,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:04,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321177644] [2021-07-13 19:29:04,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:04,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:04,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:04,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:04,286 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) [2021-07-13 19:29:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:04,452 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2021-07-13 19:29:04,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:29:04,453 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 [2021-07-13 19:29:04,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:04,454 INFO L225 Difference]: With dead ends: 157 [2021-07-13 19:29:04,454 INFO L226 Difference]: Without dead ends: 157 [2021-07-13 19:29:04,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 274.8ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:04,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-13 19:29:04,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2021-07-13 19:29:04,456 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) [2021-07-13 19:29:04,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-07-13 19:29:04,456 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-07-13 19:29:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:04,456 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-07-13 19:29:04,456 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) [2021-07-13 19:29:04,456 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-07-13 19:29:04,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:04,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:04,457 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:04,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:04,667 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:04,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1172274526, now seen corresponding path program 76 times [2021-07-13 19:29:04,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:04,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310429708] [2021-07-13 19:29:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:04,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:04,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310429708] [2021-07-13 19:29:04,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310429708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:04,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728184553] [2021-07-13 19:29:04,743 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 [2021-07-13 19:29:04,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:04,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:04,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:04,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:04,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728184553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:04,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:04,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:04,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640937470] [2021-07-13 19:29:04,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:04,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:04,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:04,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:04,886 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) [2021-07-13 19:29:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:05,058 INFO L93 Difference]: Finished difference Result 138 states and 301 transitions. [2021-07-13 19:29:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:29:05,058 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 [2021-07-13 19:29:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:05,059 INFO L225 Difference]: With dead ends: 138 [2021-07-13 19:29:05,059 INFO L226 Difference]: Without dead ends: 138 [2021-07-13 19:29:05,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:29:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-13 19:29:05,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2021-07-13 19:29:05,061 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) [2021-07-13 19:29:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-07-13 19:29:05,061 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-07-13 19:29:05,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:05,061 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-07-13 19:29:05,061 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) [2021-07-13 19:29:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-07-13 19:29:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:05,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:05,061 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:05,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-07-13 19:29:05,267 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:05,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:05,267 INFO L82 PathProgramCache]: Analyzing trace with hash 2051697306, now seen corresponding path program 77 times [2021-07-13 19:29:05,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:05,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557200628] [2021-07-13 19:29:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:05,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:05,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557200628] [2021-07-13 19:29:05,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557200628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:05,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765876139] [2021-07-13 19:29:05,342 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 [2021-07-13 19:29:05,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:29:05,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:05,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:05,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:05,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765876139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:05,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:05,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:05,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495761793] [2021-07-13 19:29:05,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:05,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:05,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:05,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:05,490 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) [2021-07-13 19:29:05,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:05,581 INFO L93 Difference]: Finished difference Result 148 states and 321 transitions. [2021-07-13 19:29:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:29:05,582 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 [2021-07-13 19:29:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:05,582 INFO L225 Difference]: With dead ends: 148 [2021-07-13 19:29:05,582 INFO L226 Difference]: Without dead ends: 148 [2021-07-13 19:29:05,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-13 19:29:05,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2021-07-13 19:29:05,584 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) [2021-07-13 19:29:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 265 transitions. [2021-07-13 19:29:05,584 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 265 transitions. Word has length 17 [2021-07-13 19:29:05,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:05,584 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 265 transitions. [2021-07-13 19:29:05,584 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) [2021-07-13 19:29:05,584 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 265 transitions. [2021-07-13 19:29:05,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:05,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:05,585 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:05,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-07-13 19:29:05,802 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:05,803 INFO L82 PathProgramCache]: Analyzing trace with hash -319138145, now seen corresponding path program 78 times [2021-07-13 19:29:05,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:05,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130660157] [2021-07-13 19:29:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:05,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:05,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130660157] [2021-07-13 19:29:05,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130660157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:05,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495943611] [2021-07-13 19:29:05,867 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 [2021-07-13 19:29:05,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:05,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:05,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:05,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:06,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495943611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:06,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:06,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:06,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073788902] [2021-07-13 19:29:06,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:06,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:06,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:06,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:06,088 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) [2021-07-13 19:29:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:06,151 INFO L93 Difference]: Finished difference Result 135 states and 295 transitions. [2021-07-13 19:29:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:29:06,152 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 [2021-07-13 19:29:06,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:06,152 INFO L225 Difference]: With dead ends: 135 [2021-07-13 19:29:06,152 INFO L226 Difference]: Without dead ends: 135 [2021-07-13 19:29:06,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:06,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-13 19:29:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 120. [2021-07-13 19:29:06,154 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) [2021-07-13 19:29:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-07-13 19:29:06,154 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-07-13 19:29:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:06,154 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-07-13 19:29:06,154 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) [2021-07-13 19:29:06,155 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-07-13 19:29:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:06,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:06,155 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:06,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:06,368 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:06,369 INFO L82 PathProgramCache]: Analyzing trace with hash 568562368, now seen corresponding path program 79 times [2021-07-13 19:29:06,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:06,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544646247] [2021-07-13 19:29:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:06,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:06,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544646247] [2021-07-13 19:29:06,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544646247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:06,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225785877] [2021-07-13 19:29:06,468 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 [2021-07-13 19:29:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:06,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:06,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:06,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225785877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:06,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:06,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:06,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162573675] [2021-07-13 19:29:06,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:06,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:06,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:06,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:06,637 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) [2021-07-13 19:29:06,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:06,756 INFO L93 Difference]: Finished difference Result 146 states and 317 transitions. [2021-07-13 19:29:06,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:29:06,756 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 [2021-07-13 19:29:06,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:06,756 INFO L225 Difference]: With dead ends: 146 [2021-07-13 19:29:06,757 INFO L226 Difference]: Without dead ends: 146 [2021-07-13 19:29:06,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:29:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-13 19:29:06,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2021-07-13 19:29:06,758 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) [2021-07-13 19:29:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-07-13 19:29:06,758 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-07-13 19:29:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:06,759 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-07-13 19:29:06,759 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) [2021-07-13 19:29:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-07-13 19:29:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:06,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:06,759 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:06,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:06,969 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:06,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:06,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1365298120, now seen corresponding path program 80 times [2021-07-13 19:29:06,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:06,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915320540] [2021-07-13 19:29:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:07,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:07,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915320540] [2021-07-13 19:29:07,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915320540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:07,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019092701] [2021-07-13 19:29:07,066 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 [2021-07-13 19:29:07,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:07,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:07,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:07,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019092701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:07,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:07,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:07,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936710266] [2021-07-13 19:29:07,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:07,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:07,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:07,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:07,230 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) [2021-07-13 19:29:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:07,374 INFO L93 Difference]: Finished difference Result 146 states and 317 transitions. [2021-07-13 19:29:07,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:29:07,375 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 [2021-07-13 19:29:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:07,375 INFO L225 Difference]: With dead ends: 146 [2021-07-13 19:29:07,375 INFO L226 Difference]: Without dead ends: 146 [2021-07-13 19:29:07,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:07,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-13 19:29:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2021-07-13 19:29:07,377 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) [2021-07-13 19:29:07,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-07-13 19:29:07,377 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-07-13 19:29:07,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:07,377 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-07-13 19:29:07,377 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) [2021-07-13 19:29:07,377 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-07-13 19:29:07,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:07,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:07,378 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:07,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-07-13 19:29:07,594 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:07,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:07,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1652848355, now seen corresponding path program 81 times [2021-07-13 19:29:07,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:07,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687532605] [2021-07-13 19:29:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:07,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:07,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687532605] [2021-07-13 19:29:07,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687532605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:07,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909241381] [2021-07-13 19:29:07,678 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 [2021-07-13 19:29:07,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:29:07,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:07,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:07,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:07,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909241381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:07,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:07,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:07,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119255060] [2021-07-13 19:29:07,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:07,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:07,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:07,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:07,911 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) [2021-07-13 19:29:08,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:08,089 INFO L93 Difference]: Finished difference Result 143 states and 310 transitions. [2021-07-13 19:29:08,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:08,090 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 [2021-07-13 19:29:08,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:08,090 INFO L225 Difference]: With dead ends: 143 [2021-07-13 19:29:08,090 INFO L226 Difference]: Without dead ends: 143 [2021-07-13 19:29:08,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 297.9ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-13 19:29:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 117. [2021-07-13 19:29:08,092 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) [2021-07-13 19:29:08,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 259 transitions. [2021-07-13 19:29:08,092 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 259 transitions. Word has length 17 [2021-07-13 19:29:08,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:08,092 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 259 transitions. [2021-07-13 19:29:08,092 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) [2021-07-13 19:29:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 259 transitions. [2021-07-13 19:29:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:08,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:08,093 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:08,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-07-13 19:29:08,309 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:08,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1871644386, now seen corresponding path program 82 times [2021-07-13 19:29:08,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:08,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172959815] [2021-07-13 19:29:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:08,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:08,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172959815] [2021-07-13 19:29:08,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172959815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:08,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737818066] [2021-07-13 19:29:08,395 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 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 [2021-07-13 19:29:08,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:08,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:08,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:08,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:08,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737818066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:08,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:08,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:08,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478676652] [2021-07-13 19:29:08,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:08,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:08,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:08,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:08,577 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) [2021-07-13 19:29:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:08,765 INFO L93 Difference]: Finished difference Result 153 states and 321 transitions. [2021-07-13 19:29:08,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:08,766 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 [2021-07-13 19:29:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:08,766 INFO L225 Difference]: With dead ends: 153 [2021-07-13 19:29:08,766 INFO L226 Difference]: Without dead ends: 153 [2021-07-13 19:29:08,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-13 19:29:08,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 118. [2021-07-13 19:29:08,768 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) [2021-07-13 19:29:08,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 261 transitions. [2021-07-13 19:29:08,768 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 261 transitions. Word has length 17 [2021-07-13 19:29:08,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:08,768 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 261 transitions. [2021-07-13 19:29:08,768 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) [2021-07-13 19:29:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 261 transitions. [2021-07-13 19:29:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:08,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:08,769 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:08,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-07-13 19:29:08,969 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:08,970 INFO L82 PathProgramCache]: Analyzing trace with hash -2135772675, now seen corresponding path program 83 times [2021-07-13 19:29:08,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:08,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5326575] [2021-07-13 19:29:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:09,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:09,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5326575] [2021-07-13 19:29:09,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5326575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:09,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057637208] [2021-07-13 19:29:09,064 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 [2021-07-13 19:29:09,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:29:09,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:09,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:09,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:09,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057637208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:09,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:09,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:09,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446112522] [2021-07-13 19:29:09,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:09,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:09,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:09,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:09,278 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) [2021-07-13 19:29:09,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:09,568 INFO L93 Difference]: Finished difference Result 196 states and 397 transitions. [2021-07-13 19:29:09,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:29:09,568 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 [2021-07-13 19:29:09,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:09,569 INFO L225 Difference]: With dead ends: 196 [2021-07-13 19:29:09,569 INFO L226 Difference]: Without dead ends: 196 [2021-07-13 19:29:09,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:29:09,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-07-13 19:29:09,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 119. [2021-07-13 19:29:09,571 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) [2021-07-13 19:29:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 266 transitions. [2021-07-13 19:29:09,571 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 266 transitions. Word has length 17 [2021-07-13 19:29:09,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:09,571 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 266 transitions. [2021-07-13 19:29:09,571 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) [2021-07-13 19:29:09,571 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 266 transitions. [2021-07-13 19:29:09,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:09,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:09,572 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:09,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-07-13 19:29:09,779 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:09,779 INFO L82 PathProgramCache]: Analyzing trace with hash 199159296, now seen corresponding path program 84 times [2021-07-13 19:29:09,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:09,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487657442] [2021-07-13 19:29:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:09,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:09,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487657442] [2021-07-13 19:29:09,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487657442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:09,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616344662] [2021-07-13 19:29:09,864 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 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 [2021-07-13 19:29:09,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:09,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:09,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:09,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:10,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616344662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:10,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:10,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:10,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225797751] [2021-07-13 19:29:10,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:10,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:10,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:10,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:10,043 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) [2021-07-13 19:29:10,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:10,248 INFO L93 Difference]: Finished difference Result 140 states and 301 transitions. [2021-07-13 19:29:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:10,249 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 [2021-07-13 19:29:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:10,249 INFO L225 Difference]: With dead ends: 140 [2021-07-13 19:29:10,249 INFO L226 Difference]: Without dead ends: 134 [2021-07-13 19:29:10,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:29:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-13 19:29:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2021-07-13 19:29:10,251 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) [2021-07-13 19:29:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 265 transitions. [2021-07-13 19:29:10,251 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 265 transitions. Word has length 17 [2021-07-13 19:29:10,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:10,251 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 265 transitions. [2021-07-13 19:29:10,251 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) [2021-07-13 19:29:10,251 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 265 transitions. [2021-07-13 19:29:10,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:10,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:10,252 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:10,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-07-13 19:29:10,452 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:10,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1833782395, now seen corresponding path program 85 times [2021-07-13 19:29:10,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:10,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082779937] [2021-07-13 19:29:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:10,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:10,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082779937] [2021-07-13 19:29:10,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082779937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:10,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605484882] [2021-07-13 19:29:10,536 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 [2021-07-13 19:29:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:10,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:10,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:10,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605484882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:10,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:10,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:10,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756243738] [2021-07-13 19:29:10,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:10,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:10,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:10,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:10,673 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) [2021-07-13 19:29:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:10,838 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2021-07-13 19:29:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:10,838 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 [2021-07-13 19:29:10,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:10,839 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:29:10,839 INFO L226 Difference]: Without dead ends: 150 [2021-07-13 19:29:10,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:10,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-13 19:29:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 116. [2021-07-13 19:29:10,841 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) [2021-07-13 19:29:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 256 transitions. [2021-07-13 19:29:10,841 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 256 transitions. Word has length 17 [2021-07-13 19:29:10,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:10,841 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 256 transitions. [2021-07-13 19:29:10,841 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) [2021-07-13 19:29:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 256 transitions. [2021-07-13 19:29:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:10,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:10,842 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:11,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-07-13 19:29:11,058 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:11,058 INFO L82 PathProgramCache]: Analyzing trace with hash -111496436, now seen corresponding path program 86 times [2021-07-13 19:29:11,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:11,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746644104] [2021-07-13 19:29:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:11,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:11,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746644104] [2021-07-13 19:29:11,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746644104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:11,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918757865] [2021-07-13 19:29:11,133 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 [2021-07-13 19:29:11,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:11,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:11,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:29:11,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:11,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918757865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:11,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:11,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:11,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854113472] [2021-07-13 19:29:11,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:11,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:11,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:11,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:11,311 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) [2021-07-13 19:29:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:11,557 INFO L93 Difference]: Finished difference Result 136 states and 296 transitions. [2021-07-13 19:29:11,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:29:11,557 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 [2021-07-13 19:29:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:11,558 INFO L225 Difference]: With dead ends: 136 [2021-07-13 19:29:11,558 INFO L226 Difference]: Without dead ends: 136 [2021-07-13 19:29:11,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:29:11,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-13 19:29:11,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 116. [2021-07-13 19:29:11,559 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) [2021-07-13 19:29:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 256 transitions. [2021-07-13 19:29:11,559 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 256 transitions. Word has length 17 [2021-07-13 19:29:11,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:11,560 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 256 transitions. [2021-07-13 19:29:11,560 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) [2021-07-13 19:29:11,560 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 256 transitions. [2021-07-13 19:29:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:11,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:11,560 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:11,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-07-13 19:29:11,777 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:11,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:11,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1182491900, now seen corresponding path program 87 times [2021-07-13 19:29:11,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:11,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862522501] [2021-07-13 19:29:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:11,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:11,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862522501] [2021-07-13 19:29:11,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862522501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:11,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114819416] [2021-07-13 19:29:11,853 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 [2021-07-13 19:29:11,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:11,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:11,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:29:11,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:12,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114819416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:12,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:12,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:12,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358938317] [2021-07-13 19:29:12,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:12,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:12,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:12,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:12,058 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) [2021-07-13 19:29:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:12,349 INFO L93 Difference]: Finished difference Result 142 states and 308 transitions. [2021-07-13 19:29:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:29:12,350 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 [2021-07-13 19:29:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:12,350 INFO L225 Difference]: With dead ends: 142 [2021-07-13 19:29:12,350 INFO L226 Difference]: Without dead ends: 142 [2021-07-13 19:29:12,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 407.0ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:29:12,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-13 19:29:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2021-07-13 19:29:12,352 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) [2021-07-13 19:29:12,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 259 transitions. [2021-07-13 19:29:12,352 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 259 transitions. Word has length 17 [2021-07-13 19:29:12,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:12,352 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 259 transitions. [2021-07-13 19:29:12,352 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) [2021-07-13 19:29:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 259 transitions. [2021-07-13 19:29:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:12,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:12,353 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:12,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-07-13 19:29:12,553 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:12,553 INFO L82 PathProgramCache]: Analyzing trace with hash 984390345, now seen corresponding path program 88 times [2021-07-13 19:29:12,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:12,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748309461] [2021-07-13 19:29:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:12,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:12,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748309461] [2021-07-13 19:29:12,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748309461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:12,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123764559] [2021-07-13 19:29:12,620 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 [2021-07-13 19:29:12,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:12,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:12,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:12,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:12,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123764559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:12,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:12,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:12,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326145028] [2021-07-13 19:29:12,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:12,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:12,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:12,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:12,829 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) [2021-07-13 19:29:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:13,013 INFO L93 Difference]: Finished difference Result 160 states and 328 transitions. [2021-07-13 19:29:13,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:29:13,013 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 [2021-07-13 19:29:13,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:13,014 INFO L225 Difference]: With dead ends: 160 [2021-07-13 19:29:13,014 INFO L226 Difference]: Without dead ends: 156 [2021-07-13 19:29:13,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:13,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-13 19:29:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 123. [2021-07-13 19:29:13,016 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) [2021-07-13 19:29:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 272 transitions. [2021-07-13 19:29:13,016 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 272 transitions. Word has length 17 [2021-07-13 19:29:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:13,016 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 272 transitions. [2021-07-13 19:29:13,016 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) [2021-07-13 19:29:13,016 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 272 transitions. [2021-07-13 19:29:13,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:13,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:13,017 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:13,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:13,233 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:13,233 INFO L82 PathProgramCache]: Analyzing trace with hash 741639945, now seen corresponding path program 89 times [2021-07-13 19:29:13,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:13,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191039874] [2021-07-13 19:29:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:13,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:13,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191039874] [2021-07-13 19:29:13,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191039874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:13,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276040412] [2021-07-13 19:29:13,299 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 [2021-07-13 19:29:13,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:29:13,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:13,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:13,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:13,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276040412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:13,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:13,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:13,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325421819] [2021-07-13 19:29:13,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:13,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:13,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:13,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:13,528 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) [2021-07-13 19:29:13,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:13,636 INFO L93 Difference]: Finished difference Result 134 states and 291 transitions. [2021-07-13 19:29:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:29:13,637 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 [2021-07-13 19:29:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:13,637 INFO L225 Difference]: With dead ends: 134 [2021-07-13 19:29:13,637 INFO L226 Difference]: Without dead ends: 134 [2021-07-13 19:29:13,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-13 19:29:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2021-07-13 19:29:13,639 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) [2021-07-13 19:29:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-07-13 19:29:13,639 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-07-13 19:29:13,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:13,639 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-07-13 19:29:13,639 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) [2021-07-13 19:29:13,639 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-07-13 19:29:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:13,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:13,639 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:13,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:13,856 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:13,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:13,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1629340458, now seen corresponding path program 90 times [2021-07-13 19:29:13,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:13,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246397269] [2021-07-13 19:29:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:13,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:13,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246397269] [2021-07-13 19:29:13,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246397269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:13,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413048389] [2021-07-13 19:29:13,960 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 [2021-07-13 19:29:13,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:13,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:13,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:13,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:14,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413048389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:14,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:14,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:14,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907004720] [2021-07-13 19:29:14,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:14,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:14,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:14,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:14,121 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) [2021-07-13 19:29:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:14,250 INFO L93 Difference]: Finished difference Result 134 states and 292 transitions. [2021-07-13 19:29:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:29:14,251 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 [2021-07-13 19:29:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:14,251 INFO L225 Difference]: With dead ends: 134 [2021-07-13 19:29:14,251 INFO L226 Difference]: Without dead ends: 134 [2021-07-13 19:29:14,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:14,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-13 19:29:14,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2021-07-13 19:29:14,253 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) [2021-07-13 19:29:14,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-07-13 19:29:14,253 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-07-13 19:29:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:14,253 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-07-13 19:29:14,253 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) [2021-07-13 19:29:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-07-13 19:29:14,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:14,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:14,254 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:14,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:14,454 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:14,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:14,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1868891086, now seen corresponding path program 91 times [2021-07-13 19:29:14,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:14,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947880235] [2021-07-13 19:29:14,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:14,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:14,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947880235] [2021-07-13 19:29:14,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947880235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:14,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420123530] [2021-07-13 19:29:14,542 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 [2021-07-13 19:29:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:14,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:14,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:14,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420123530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:14,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:14,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:14,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311147892] [2021-07-13 19:29:14,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:14,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:14,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:14,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:14,675 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) [2021-07-13 19:29:14,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:14,886 INFO L93 Difference]: Finished difference Result 148 states and 315 transitions. [2021-07-13 19:29:14,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:14,887 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 [2021-07-13 19:29:14,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:14,887 INFO L225 Difference]: With dead ends: 148 [2021-07-13 19:29:14,887 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:29:14,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:29:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:29:14,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 115. [2021-07-13 19:29:14,889 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) [2021-07-13 19:29:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 253 transitions. [2021-07-13 19:29:14,889 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 253 transitions. Word has length 17 [2021-07-13 19:29:14,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:14,889 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 253 transitions. [2021-07-13 19:29:14,889 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) [2021-07-13 19:29:14,889 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 253 transitions. [2021-07-13 19:29:14,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:14,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:14,889 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:15,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-07-13 19:29:15,090 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:15,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:15,090 INFO L82 PathProgramCache]: Analyzing trace with hash -741494993, now seen corresponding path program 92 times [2021-07-13 19:29:15,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:15,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512845259] [2021-07-13 19:29:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:15,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:15,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512845259] [2021-07-13 19:29:15,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512845259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:15,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190717777] [2021-07-13 19:29:15,176 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 [2021-07-13 19:29:15,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:15,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:15,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:15,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:15,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190717777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:15,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:15,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:15,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649225518] [2021-07-13 19:29:15,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:15,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:15,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:15,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:15,375 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) [2021-07-13 19:29:15,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:15,542 INFO L93 Difference]: Finished difference Result 133 states and 285 transitions. [2021-07-13 19:29:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:29:15,543 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 [2021-07-13 19:29:15,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:15,543 INFO L225 Difference]: With dead ends: 133 [2021-07-13 19:29:15,543 INFO L226 Difference]: Without dead ends: 131 [2021-07-13 19:29:15,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 285.4ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-13 19:29:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2021-07-13 19:29:15,545 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) [2021-07-13 19:29:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 248 transitions. [2021-07-13 19:29:15,545 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 248 transitions. Word has length 17 [2021-07-13 19:29:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:15,545 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 248 transitions. [2021-07-13 19:29:15,545 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) [2021-07-13 19:29:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 248 transitions. [2021-07-13 19:29:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:15,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:15,545 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:15,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:15,747 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:15,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:15,747 INFO L82 PathProgramCache]: Analyzing trace with hash -235148727, now seen corresponding path program 93 times [2021-07-13 19:29:15,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:15,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392596788] [2021-07-13 19:29:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:15,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:15,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392596788] [2021-07-13 19:29:15,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392596788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:15,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616899319] [2021-07-13 19:29:15,832 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 [2021-07-13 19:29:15,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:15,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:15,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:15,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:15,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616899319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:15,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:15,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:15,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985213596] [2021-07-13 19:29:15,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:15,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:15,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:15,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:15,979 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) [2021-07-13 19:29:16,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:16,196 INFO L93 Difference]: Finished difference Result 184 states and 371 transitions. [2021-07-13 19:29:16,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:29:16,196 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 [2021-07-13 19:29:16,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:16,197 INFO L225 Difference]: With dead ends: 184 [2021-07-13 19:29:16,197 INFO L226 Difference]: Without dead ends: 184 [2021-07-13 19:29:16,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-13 19:29:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 115. [2021-07-13 19:29:16,198 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) [2021-07-13 19:29:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 255 transitions. [2021-07-13 19:29:16,199 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 255 transitions. Word has length 17 [2021-07-13 19:29:16,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:16,199 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 255 transitions. [2021-07-13 19:29:16,199 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) [2021-07-13 19:29:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 255 transitions. [2021-07-13 19:29:16,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:16,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:16,199 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:16,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-07-13 19:29:16,419 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:16,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1259937386, now seen corresponding path program 94 times [2021-07-13 19:29:16,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:16,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114368570] [2021-07-13 19:29:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:16,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:16,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114368570] [2021-07-13 19:29:16,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114368570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:16,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18141470] [2021-07-13 19:29:16,518 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 [2021-07-13 19:29:16,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:16,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:16,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:16,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:16,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18141470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:16,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:16,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:16,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276637044] [2021-07-13 19:29:16,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:16,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:16,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:16,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:16,721 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) [2021-07-13 19:29:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:16,864 INFO L93 Difference]: Finished difference Result 144 states and 298 transitions. [2021-07-13 19:29:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:16,865 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 [2021-07-13 19:29:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:16,865 INFO L225 Difference]: With dead ends: 144 [2021-07-13 19:29:16,866 INFO L226 Difference]: Without dead ends: 138 [2021-07-13 19:29:16,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-13 19:29:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2021-07-13 19:29:16,867 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) [2021-07-13 19:29:16,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 264 transitions. [2021-07-13 19:29:16,867 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 264 transitions. Word has length 17 [2021-07-13 19:29:16,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:16,867 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 264 transitions. [2021-07-13 19:29:16,867 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) [2021-07-13 19:29:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 264 transitions. [2021-07-13 19:29:16,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:16,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:16,868 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:17,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:17,081 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash -773004305, now seen corresponding path program 95 times [2021-07-13 19:29:17,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:17,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28308007] [2021-07-13 19:29:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:17,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:17,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28308007] [2021-07-13 19:29:17,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28308007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:17,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451008270] [2021-07-13 19:29:17,173 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 [2021-07-13 19:29:17,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:29:17,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:17,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:17,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:17,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451008270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:17,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:17,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:17,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640324730] [2021-07-13 19:29:17,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:17,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:17,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:17,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:17,327 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) [2021-07-13 19:29:17,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:17,469 INFO L93 Difference]: Finished difference Result 142 states and 303 transitions. [2021-07-13 19:29:17,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:29:17,470 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 [2021-07-13 19:29:17,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:17,470 INFO L225 Difference]: With dead ends: 142 [2021-07-13 19:29:17,470 INFO L226 Difference]: Without dead ends: 142 [2021-07-13 19:29:17,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:29:17,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-13 19:29:17,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 119. [2021-07-13 19:29:17,472 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) [2021-07-13 19:29:17,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-07-13 19:29:17,472 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-07-13 19:29:17,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:17,472 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-07-13 19:29:17,472 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) [2021-07-13 19:29:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-07-13 19:29:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:17,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:17,472 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:17,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-07-13 19:29:17,690 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:17,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:17,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1398169660, now seen corresponding path program 96 times [2021-07-13 19:29:17,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:17,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622638123] [2021-07-13 19:29:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:17,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:17,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622638123] [2021-07-13 19:29:17,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622638123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:17,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566258444] [2021-07-13 19:29:17,779 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 [2021-07-13 19:29:17,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:29:17,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:17,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:17,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:17,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566258444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:17,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:17,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:17,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610710566] [2021-07-13 19:29:17,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:17,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:17,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:17,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:17,918 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) [2021-07-13 19:29:18,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:18,050 INFO L93 Difference]: Finished difference Result 138 states and 295 transitions. [2021-07-13 19:29:18,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:29:18,051 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 [2021-07-13 19:29:18,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:18,051 INFO L225 Difference]: With dead ends: 138 [2021-07-13 19:29:18,051 INFO L226 Difference]: Without dead ends: 138 [2021-07-13 19:29:18,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-13 19:29:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2021-07-13 19:29:18,052 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) [2021-07-13 19:29:18,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-07-13 19:29:18,053 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-07-13 19:29:18,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:18,053 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-07-13 19:29:18,053 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) [2021-07-13 19:29:18,053 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-07-13 19:29:18,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:18,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:18,053 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:18,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-07-13 19:29:18,269 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:18,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:18,269 INFO L82 PathProgramCache]: Analyzing trace with hash -601433908, now seen corresponding path program 97 times [2021-07-13 19:29:18,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:18,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031903840] [2021-07-13 19:29:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:18,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:18,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031903840] [2021-07-13 19:29:18,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031903840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:18,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803073707] [2021-07-13 19:29:18,366 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 [2021-07-13 19:29:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:18,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:18,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:18,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803073707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:18,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:18,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:18,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641511412] [2021-07-13 19:29:18,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:18,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:18,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:18,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:18,526 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) [2021-07-13 19:29:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:18,653 INFO L93 Difference]: Finished difference Result 148 states and 315 transitions. [2021-07-13 19:29:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:29:18,654 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 [2021-07-13 19:29:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:18,654 INFO L225 Difference]: With dead ends: 148 [2021-07-13 19:29:18,654 INFO L226 Difference]: Without dead ends: 148 [2021-07-13 19:29:18,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:18,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-13 19:29:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2021-07-13 19:29:18,656 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) [2021-07-13 19:29:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-07-13 19:29:18,656 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-07-13 19:29:18,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:18,656 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-07-13 19:29:18,656 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) [2021-07-13 19:29:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-07-13 19:29:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:18,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:18,657 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:18,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:18,871 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:18,871 INFO L82 PathProgramCache]: Analyzing trace with hash -313883673, now seen corresponding path program 98 times [2021-07-13 19:29:18,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:18,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93623280] [2021-07-13 19:29:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:18,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:18,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93623280] [2021-07-13 19:29:18,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93623280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:18,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937561127] [2021-07-13 19:29:18,978 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 [2021-07-13 19:29:19,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:19,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:19,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:29:19,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:19,277 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 19:29:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:19,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937561127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:19,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:19,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:19,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440895434] [2021-07-13 19:29:19,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:19,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:19,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:19,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:19,325 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) [2021-07-13 19:29:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:19,478 INFO L93 Difference]: Finished difference Result 134 states and 282 transitions. [2021-07-13 19:29:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:29:19,478 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 [2021-07-13 19:29:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:19,479 INFO L225 Difference]: With dead ends: 134 [2021-07-13 19:29:19,479 INFO L226 Difference]: Without dead ends: 134 [2021-07-13 19:29:19,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 409.5ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:19,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-13 19:29:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 112. [2021-07-13 19:29:19,480 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) [2021-07-13 19:29:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-07-13 19:29:19,481 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-07-13 19:29:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:19,481 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-07-13 19:29:19,481 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) [2021-07-13 19:29:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-07-13 19:29:19,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:19,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:19,481 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:19,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:19,697 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash -302282879, now seen corresponding path program 99 times [2021-07-13 19:29:19,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:19,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220863865] [2021-07-13 19:29:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:19,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:19,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220863865] [2021-07-13 19:29:19,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220863865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:19,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450400307] [2021-07-13 19:29:19,785 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 [2021-07-13 19:29:19,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:19,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:19,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:19,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:19,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450400307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:19,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:19,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:19,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169635489] [2021-07-13 19:29:19,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:19,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:19,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:19,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:19,922 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) [2021-07-13 19:29:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:20,141 INFO L93 Difference]: Finished difference Result 150 states and 305 transitions. [2021-07-13 19:29:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:20,141 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 [2021-07-13 19:29:20,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:20,141 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:29:20,141 INFO L226 Difference]: Without dead ends: 148 [2021-07-13 19:29:20,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:29:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-13 19:29:20,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 118. [2021-07-13 19:29:20,143 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) [2021-07-13 19:29:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 250 transitions. [2021-07-13 19:29:20,143 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 250 transitions. Word has length 17 [2021-07-13 19:29:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:20,143 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 250 transitions. [2021-07-13 19:29:20,143 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) [2021-07-13 19:29:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 250 transitions. [2021-07-13 19:29:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:20,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:20,144 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:20,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-07-13 19:29:20,344 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:20,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:20,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1032308451, now seen corresponding path program 100 times [2021-07-13 19:29:20,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:20,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616146858] [2021-07-13 19:29:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:20,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:20,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616146858] [2021-07-13 19:29:20,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616146858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:20,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870175395] [2021-07-13 19:29:20,434 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 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 [2021-07-13 19:29:20,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:20,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:20,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:20,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:20,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870175395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:20,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:20,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:20,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92084751] [2021-07-13 19:29:20,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:20,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:20,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:20,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:20,575 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) [2021-07-13 19:29:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:20,838 INFO L93 Difference]: Finished difference Result 156 states and 319 transitions. [2021-07-13 19:29:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:20,838 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 [2021-07-13 19:29:20,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:20,838 INFO L225 Difference]: With dead ends: 156 [2021-07-13 19:29:20,839 INFO L226 Difference]: Without dead ends: 156 [2021-07-13 19:29:20,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:29:20,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-13 19:29:20,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2021-07-13 19:29:20,840 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) [2021-07-13 19:29:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 248 transitions. [2021-07-13 19:29:20,840 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 248 transitions. Word has length 17 [2021-07-13 19:29:20,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:20,840 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 248 transitions. [2021-07-13 19:29:20,840 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) [2021-07-13 19:29:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 248 transitions. [2021-07-13 19:29:20,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:20,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:20,841 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:21,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:21,041 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:21,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:21,042 INFO L82 PathProgramCache]: Analyzing trace with hash 494452873, now seen corresponding path program 101 times [2021-07-13 19:29:21,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:21,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050302853] [2021-07-13 19:29:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:21,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:21,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050302853] [2021-07-13 19:29:21,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050302853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:21,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063373776] [2021-07-13 19:29:21,136 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 [2021-07-13 19:29:21,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:29:21,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:21,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:21,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:21,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063373776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:21,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:21,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:21,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491454406] [2021-07-13 19:29:21,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:21,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:21,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:21,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:21,322 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) [2021-07-13 19:29:21,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:21,482 INFO L93 Difference]: Finished difference Result 136 states and 284 transitions. [2021-07-13 19:29:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:29:21,483 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 [2021-07-13 19:29:21,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:21,483 INFO L225 Difference]: With dead ends: 136 [2021-07-13 19:29:21,483 INFO L226 Difference]: Without dead ends: 136 [2021-07-13 19:29:21,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:29:21,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-13 19:29:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 111. [2021-07-13 19:29:21,485 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) [2021-07-13 19:29:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 234 transitions. [2021-07-13 19:29:21,485 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 234 transitions. Word has length 17 [2021-07-13 19:29:21,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:21,485 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 234 transitions. [2021-07-13 19:29:21,485 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) [2021-07-13 19:29:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 234 transitions. [2021-07-13 19:29:21,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:21,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:21,485 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:21,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-07-13 19:29:21,686 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:21,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:21,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1578222580, now seen corresponding path program 102 times [2021-07-13 19:29:21,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:21,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100669392] [2021-07-13 19:29:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:21,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:21,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100669392] [2021-07-13 19:29:21,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100669392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:21,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939572631] [2021-07-13 19:29:21,769 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 [2021-07-13 19:29:21,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:29:21,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:21,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:21,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:22,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939572631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:22,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:22,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:22,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891110296] [2021-07-13 19:29:22,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:22,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:22,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:22,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:22,051 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) [2021-07-13 19:29:22,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:22,167 INFO L93 Difference]: Finished difference Result 127 states and 266 transitions. [2021-07-13 19:29:22,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:29:22,167 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 [2021-07-13 19:29:22,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:22,167 INFO L225 Difference]: With dead ends: 127 [2021-07-13 19:29:22,168 INFO L226 Difference]: Without dead ends: 127 [2021-07-13 19:29:22,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:22,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-13 19:29:22,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2021-07-13 19:29:22,169 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) [2021-07-13 19:29:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 240 transitions. [2021-07-13 19:29:22,169 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 240 transitions. Word has length 17 [2021-07-13 19:29:22,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:22,169 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 240 transitions. [2021-07-13 19:29:22,169 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) [2021-07-13 19:29:22,169 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 240 transitions. [2021-07-13 19:29:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:22,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:22,170 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:22,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:22,370 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:22,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:22,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1290672345, now seen corresponding path program 103 times [2021-07-13 19:29:22,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:22,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532820380] [2021-07-13 19:29:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:22,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:22,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532820380] [2021-07-13 19:29:22,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532820380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:22,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639227708] [2021-07-13 19:29:22,454 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 [2021-07-13 19:29:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:22,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:22,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:22,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639227708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:22,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:22,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:22,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522156968] [2021-07-13 19:29:22,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:22,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:22,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:22,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:22,631 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) [2021-07-13 19:29:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:22,932 INFO L93 Difference]: Finished difference Result 157 states and 322 transitions. [2021-07-13 19:29:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:29:22,933 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 [2021-07-13 19:29:22,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:22,933 INFO L225 Difference]: With dead ends: 157 [2021-07-13 19:29:22,933 INFO L226 Difference]: Without dead ends: 157 [2021-07-13 19:29:22,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 341.3ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:29:22,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-13 19:29:22,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2021-07-13 19:29:22,937 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) [2021-07-13 19:29:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 251 transitions. [2021-07-13 19:29:22,937 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 251 transitions. Word has length 17 [2021-07-13 19:29:22,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:22,937 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 251 transitions. [2021-07-13 19:29:22,937 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) [2021-07-13 19:29:22,937 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 251 transitions. [2021-07-13 19:29:22,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:22,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:22,937 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:23,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2021-07-13 19:29:23,138 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:23,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:23,138 INFO L82 PathProgramCache]: Analyzing trace with hash -988682065, now seen corresponding path program 104 times [2021-07-13 19:29:23,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:23,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508730100] [2021-07-13 19:29:23,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:23,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:23,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508730100] [2021-07-13 19:29:23,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508730100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:23,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028051597] [2021-07-13 19:29:23,214 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 [2021-07-13 19:29:23,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:23,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:23,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:23,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:23,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028051597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:23,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:23,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:23,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122632258] [2021-07-13 19:29:23,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:23,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:23,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:23,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:23,360 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) [2021-07-13 19:29:23,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:23,611 INFO L93 Difference]: Finished difference Result 145 states and 303 transitions. [2021-07-13 19:29:23,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:29:23,611 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 [2021-07-13 19:29:23,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:23,612 INFO L225 Difference]: With dead ends: 145 [2021-07-13 19:29:23,612 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:29:23,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 321.4ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:29:23,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:29:23,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 117. [2021-07-13 19:29:23,613 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) [2021-07-13 19:29:23,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-07-13 19:29:23,613 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-07-13 19:29:23,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:23,614 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-07-13 19:29:23,614 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) [2021-07-13 19:29:23,614 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-07-13 19:29:23,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:23,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:23,614 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:23,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable638 [2021-07-13 19:29:23,814 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:23,815 INFO L82 PathProgramCache]: Analyzing trace with hash -482335799, now seen corresponding path program 105 times [2021-07-13 19:29:23,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:23,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859135887] [2021-07-13 19:29:23,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:23,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:23,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859135887] [2021-07-13 19:29:23,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859135887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:23,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434030241] [2021-07-13 19:29:23,888 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 [2021-07-13 19:29:23,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:23,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:23,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:23,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:24,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434030241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:24,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:24,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:24,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686713240] [2021-07-13 19:29:24,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:24,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:24,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:24,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:24,037 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) [2021-07-13 19:29:24,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:24,236 INFO L93 Difference]: Finished difference Result 137 states and 286 transitions. [2021-07-13 19:29:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:29:24,236 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 [2021-07-13 19:29:24,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:24,236 INFO L225 Difference]: With dead ends: 137 [2021-07-13 19:29:24,236 INFO L226 Difference]: Without dead ends: 137 [2021-07-13 19:29:24,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:29:24,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-13 19:29:24,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2021-07-13 19:29:24,238 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) [2021-07-13 19:29:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 239 transitions. [2021-07-13 19:29:24,238 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 239 transitions. Word has length 17 [2021-07-13 19:29:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:24,238 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 239 transitions. [2021-07-13 19:29:24,238 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) [2021-07-13 19:29:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 239 transitions. [2021-07-13 19:29:24,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:24,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:24,238 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:24,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-07-13 19:29:24,439 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:24,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:24,439 INFO L82 PathProgramCache]: Analyzing trace with hash 425996420, now seen corresponding path program 106 times [2021-07-13 19:29:24,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:24,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202716366] [2021-07-13 19:29:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:24,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:24,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202716366] [2021-07-13 19:29:24,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202716366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:24,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10137258] [2021-07-13 19:29:24,496 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 [2021-07-13 19:29:24,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:24,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:24,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:24,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:24,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10137258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:24,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:24,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:24,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105424174] [2021-07-13 19:29:24,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:24,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:24,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:24,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:24,654 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) [2021-07-13 19:29:24,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:24,807 INFO L93 Difference]: Finished difference Result 124 states and 260 transitions. [2021-07-13 19:29:24,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:29:24,808 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 [2021-07-13 19:29:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:24,808 INFO L225 Difference]: With dead ends: 124 [2021-07-13 19:29:24,808 INFO L226 Difference]: Without dead ends: 124 [2021-07-13 19:29:24,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-07-13 19:29:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2021-07-13 19:29:24,809 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) [2021-07-13 19:29:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 239 transitions. [2021-07-13 19:29:24,810 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 239 transitions. Word has length 17 [2021-07-13 19:29:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:24,810 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 239 transitions. [2021-07-13 19:29:24,810 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) [2021-07-13 19:29:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 239 transitions. [2021-07-13 19:29:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:24,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:24,810 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:25,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable644,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:25,011 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:25,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:25,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1120130721, now seen corresponding path program 107 times [2021-07-13 19:29:25,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:25,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530269181] [2021-07-13 19:29:25,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:25,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:25,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530269181] [2021-07-13 19:29:25,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530269181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:25,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226983044] [2021-07-13 19:29:25,078 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 [2021-07-13 19:29:25,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:29:25,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:25,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:25,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:25,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226983044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:25,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:25,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:25,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233199190] [2021-07-13 19:29:25,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:25,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:25,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:25,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:25,315 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) [2021-07-13 19:29:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:25,524 INFO L93 Difference]: Finished difference Result 119 states and 246 transitions. [2021-07-13 19:29:25,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:29:25,524 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 [2021-07-13 19:29:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:25,525 INFO L225 Difference]: With dead ends: 119 [2021-07-13 19:29:25,525 INFO L226 Difference]: Without dead ends: 113 [2021-07-13 19:29:25,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:29:25,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-13 19:29:25,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-07-13 19:29:25,526 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) [2021-07-13 19:29:25,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-07-13 19:29:25,526 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 17 [2021-07-13 19:29:25,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:25,526 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-07-13 19:29:25,526 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) [2021-07-13 19:29:25,526 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-07-13 19:29:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:25,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:25,527 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:25,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:25,727 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:25,728 INFO L82 PathProgramCache]: Analyzing trace with hash -644999044, now seen corresponding path program 108 times [2021-07-13 19:29:25,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:25,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024644219] [2021-07-13 19:29:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:25,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:25,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024644219] [2021-07-13 19:29:25,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024644219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:25,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731927166] [2021-07-13 19:29:25,811 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 [2021-07-13 19:29:25,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:25,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:25,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:25,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:25,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731927166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:25,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:25,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:25,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137014361] [2021-07-13 19:29:25,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:25,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:25,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:25,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:25,951 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) [2021-07-13 19:29:26,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:26,211 INFO L93 Difference]: Finished difference Result 133 states and 277 transitions. [2021-07-13 19:29:26,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:29:26,211 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 [2021-07-13 19:29:26,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:26,212 INFO L225 Difference]: With dead ends: 133 [2021-07-13 19:29:26,212 INFO L226 Difference]: Without dead ends: 133 [2021-07-13 19:29:26,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:29:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-13 19:29:26,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 113. [2021-07-13 19:29:26,214 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) [2021-07-13 19:29:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-07-13 19:29:26,214 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 17 [2021-07-13 19:29:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:26,214 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-07-13 19:29:26,214 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) [2021-07-13 19:29:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-07-13 19:29:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:26,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:26,215 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:26,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-07-13 19:29:26,415 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:26,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1521883201, now seen corresponding path program 109 times [2021-07-13 19:29:26,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:26,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295251495] [2021-07-13 19:29:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:26,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:26,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295251495] [2021-07-13 19:29:26,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295251495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:26,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895772245] [2021-07-13 19:29:26,484 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 [2021-07-13 19:29:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:26,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:26,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:26,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895772245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:26,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:26,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:26,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821375693] [2021-07-13 19:29:26,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:26,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:26,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:26,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:26,853 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) [2021-07-13 19:29:27,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:27,049 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-07-13 19:29:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:29:27,049 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 [2021-07-13 19:29:27,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:27,050 INFO L225 Difference]: With dead ends: 151 [2021-07-13 19:29:27,050 INFO L226 Difference]: Without dead ends: 147 [2021-07-13 19:29:27,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 310.1ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:27,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-13 19:29:27,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 119. [2021-07-13 19:29:27,051 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) [2021-07-13 19:29:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 251 transitions. [2021-07-13 19:29:27,051 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 251 transitions. Word has length 17 [2021-07-13 19:29:27,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:27,052 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 251 transitions. [2021-07-13 19:29:27,052 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) [2021-07-13 19:29:27,052 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 251 transitions. [2021-07-13 19:29:27,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:27,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:27,052 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:27,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-07-13 19:29:27,253 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:27,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1279132801, now seen corresponding path program 110 times [2021-07-13 19:29:27,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:27,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374699222] [2021-07-13 19:29:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:27,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:27,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374699222] [2021-07-13 19:29:27,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374699222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:27,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131718320] [2021-07-13 19:29:27,318 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 [2021-07-13 19:29:27,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:27,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:27,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:29:27,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:27,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131718320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:27,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:27,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:27,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902966088] [2021-07-13 19:29:27,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:27,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:27,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:27,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:27,545 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) [2021-07-13 19:29:27,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:27,641 INFO L93 Difference]: Finished difference Result 125 states and 260 transitions. [2021-07-13 19:29:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:29:27,641 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 [2021-07-13 19:29:27,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:27,642 INFO L225 Difference]: With dead ends: 125 [2021-07-13 19:29:27,642 INFO L226 Difference]: Without dead ends: 125 [2021-07-13 19:29:27,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-13 19:29:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2021-07-13 19:29:27,643 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) [2021-07-13 19:29:27,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-07-13 19:29:27,643 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-07-13 19:29:27,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:27,643 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-07-13 19:29:27,643 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) [2021-07-13 19:29:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-07-13 19:29:27,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:27,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:27,644 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:27,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:27,845 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:27,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2128133982, now seen corresponding path program 111 times [2021-07-13 19:29:27,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:27,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272002885] [2021-07-13 19:29:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:27,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:27,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272002885] [2021-07-13 19:29:27,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272002885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:27,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832848541] [2021-07-13 19:29:27,936 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 [2021-07-13 19:29:27,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:27,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:27,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:27,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:28,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832848541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:28,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:28,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:28,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785755442] [2021-07-13 19:29:28,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:28,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:28,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:28,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:28,094 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) [2021-07-13 19:29:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:28,236 INFO L93 Difference]: Finished difference Result 125 states and 261 transitions. [2021-07-13 19:29:28,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:29:28,236 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 [2021-07-13 19:29:28,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:28,237 INFO L225 Difference]: With dead ends: 125 [2021-07-13 19:29:28,237 INFO L226 Difference]: Without dead ends: 125 [2021-07-13 19:29:28,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:29:28,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-13 19:29:28,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2021-07-13 19:29:28,238 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) [2021-07-13 19:29:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-07-13 19:29:28,238 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-07-13 19:29:28,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:28,238 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-07-13 19:29:28,238 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) [2021-07-13 19:29:28,238 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-07-13 19:29:28,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:28,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:28,239 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:28,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-07-13 19:29:28,439 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:28,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1331398230, now seen corresponding path program 112 times [2021-07-13 19:29:28,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:28,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307498426] [2021-07-13 19:29:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:28,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:28,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307498426] [2021-07-13 19:29:28,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307498426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:28,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386014268] [2021-07-13 19:29:28,528 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 [2021-07-13 19:29:28,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:28,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:28,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:28,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:28,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386014268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:28,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:28,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:28,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674971536] [2021-07-13 19:29:28,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:28,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:28,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:28,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:28,676 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) [2021-07-13 19:29:28,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:28,911 INFO L93 Difference]: Finished difference Result 134 states and 279 transitions. [2021-07-13 19:29:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:29:28,912 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 [2021-07-13 19:29:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:28,912 INFO L225 Difference]: With dead ends: 134 [2021-07-13 19:29:28,912 INFO L226 Difference]: Without dead ends: 134 [2021-07-13 19:29:28,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:29:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-13 19:29:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2021-07-13 19:29:28,913 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) [2021-07-13 19:29:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-07-13 19:29:28,914 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-07-13 19:29:28,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:28,914 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-07-13 19:29:28,914 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) [2021-07-13 19:29:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-07-13 19:29:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:28,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:28,914 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:29,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:29,115 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:29,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1043847995, now seen corresponding path program 113 times [2021-07-13 19:29:29,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:29,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607885106] [2021-07-13 19:29:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:29,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:29,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607885106] [2021-07-13 19:29:29,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607885106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:29,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355917702] [2021-07-13 19:29:29,201 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 [2021-07-13 19:29:29,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:29:29,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:29,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:29,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:29,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355917702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:29,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:29,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:29,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833105504] [2021-07-13 19:29:29,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:29,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:29,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:29,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:29,416 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) [2021-07-13 19:29:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:29,539 INFO L93 Difference]: Finished difference Result 121 states and 251 transitions. [2021-07-13 19:29:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:29:29,539 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 [2021-07-13 19:29:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:29,539 INFO L225 Difference]: With dead ends: 121 [2021-07-13 19:29:29,539 INFO L226 Difference]: Without dead ends: 121 [2021-07-13 19:29:29,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:29:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-13 19:29:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 108. [2021-07-13 19:29:29,541 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) [2021-07-13 19:29:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 226 transitions. [2021-07-13 19:29:29,541 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 226 transitions. Word has length 17 [2021-07-13 19:29:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:29,541 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 226 transitions. [2021-07-13 19:29:29,541 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) [2021-07-13 19:29:29,541 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 226 transitions. [2021-07-13 19:29:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:29,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:29,541 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:29,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-07-13 19:29:29,742 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:29,742 INFO L82 PathProgramCache]: Analyzing trace with hash 302344129, now seen corresponding path program 114 times [2021-07-13 19:29:29,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:29,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102013958] [2021-07-13 19:29:29,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:29,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:29,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102013958] [2021-07-13 19:29:29,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102013958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:29,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842686765] [2021-07-13 19:29:29,831 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 [2021-07-13 19:29:29,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:29,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:29,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:29,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:30,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842686765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:30,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:30,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:30,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853737258] [2021-07-13 19:29:30,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:30,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:30,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:30,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:30,003 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) [2021-07-13 19:29:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:30,209 INFO L93 Difference]: Finished difference Result 172 states and 335 transitions. [2021-07-13 19:29:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:29:30,209 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 [2021-07-13 19:29:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:30,209 INFO L225 Difference]: With dead ends: 172 [2021-07-13 19:29:30,209 INFO L226 Difference]: Without dead ends: 172 [2021-07-13 19:29:30,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-13 19:29:30,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 110. [2021-07-13 19:29:30,211 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) [2021-07-13 19:29:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-07-13 19:29:30,211 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-07-13 19:29:30,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:30,211 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-07-13 19:29:30,211 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) [2021-07-13 19:29:30,211 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-07-13 19:29:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:30,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:30,212 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:30,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:30,412 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:30,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:30,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1797430242, now seen corresponding path program 115 times [2021-07-13 19:29:30,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:30,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992283555] [2021-07-13 19:29:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:30,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:30,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992283555] [2021-07-13 19:29:30,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992283555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:30,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484852234] [2021-07-13 19:29:30,494 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 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 [2021-07-13 19:29:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:30,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:30,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:30,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484852234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:30,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:30,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:30,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089997040] [2021-07-13 19:29:30,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:30,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:30,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:30,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:30,662 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) [2021-07-13 19:29:30,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:30,788 INFO L93 Difference]: Finished difference Result 150 states and 297 transitions. [2021-07-13 19:29:30,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:29:30,788 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 [2021-07-13 19:29:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:30,789 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:29:30,789 INFO L226 Difference]: Without dead ends: 144 [2021-07-13 19:29:30,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:29:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-13 19:29:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 115. [2021-07-13 19:29:30,790 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) [2021-07-13 19:29:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 248 transitions. [2021-07-13 19:29:30,790 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 248 transitions. Word has length 17 [2021-07-13 19:29:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:30,790 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 248 transitions. [2021-07-13 19:29:30,790 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) [2021-07-13 19:29:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 248 transitions. [2021-07-13 19:29:30,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:30,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:30,791 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:30,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-07-13 19:29:30,991 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:30,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:30,992 INFO L82 PathProgramCache]: Analyzing trace with hash -235511449, now seen corresponding path program 116 times [2021-07-13 19:29:30,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:30,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365072148] [2021-07-13 19:29:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:31,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:31,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365072148] [2021-07-13 19:29:31,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365072148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:31,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717714112] [2021-07-13 19:29:31,097 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 [2021-07-13 19:29:31,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:31,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:31,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:31,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:31,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717714112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:31,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:31,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:31,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063763308] [2021-07-13 19:29:31,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:31,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:31,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:31,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:31,239 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) [2021-07-13 19:29:31,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:31,334 INFO L93 Difference]: Finished difference Result 129 states and 273 transitions. [2021-07-13 19:29:31,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:29:31,334 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 [2021-07-13 19:29:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:31,335 INFO L225 Difference]: With dead ends: 129 [2021-07-13 19:29:31,335 INFO L226 Difference]: Without dead ends: 129 [2021-07-13 19:29:31,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:31,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-13 19:29:31,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2021-07-13 19:29:31,336 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) [2021-07-13 19:29:31,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-07-13 19:29:31,336 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-07-13 19:29:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:31,336 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-07-13 19:29:31,336 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) [2021-07-13 19:29:31,337 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-07-13 19:29:31,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:31,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:31,337 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:31,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:31,537 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:31,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:31,538 INFO L82 PathProgramCache]: Analyzing trace with hash -860676804, now seen corresponding path program 117 times [2021-07-13 19:29:31,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:31,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010399784] [2021-07-13 19:29:31,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:31,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:31,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010399784] [2021-07-13 19:29:31,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010399784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:31,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084877575] [2021-07-13 19:29:31,631 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 [2021-07-13 19:29:31,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:29:31,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:31,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:31,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:31,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084877575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:31,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:31,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:31,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301088299] [2021-07-13 19:29:31,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:31,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:31,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:31,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:31,769 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) [2021-07-13 19:29:31,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:31,902 INFO L93 Difference]: Finished difference Result 127 states and 269 transitions. [2021-07-13 19:29:31,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:29:31,902 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 [2021-07-13 19:29:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:31,902 INFO L225 Difference]: With dead ends: 127 [2021-07-13 19:29:31,902 INFO L226 Difference]: Without dead ends: 127 [2021-07-13 19:29:31,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:29:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-13 19:29:31,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2021-07-13 19:29:31,904 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) [2021-07-13 19:29:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-07-13 19:29:31,904 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-07-13 19:29:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:31,904 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-07-13 19:29:31,904 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) [2021-07-13 19:29:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-07-13 19:29:31,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:31,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:31,904 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:32,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-07-13 19:29:32,105 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:32,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:32,105 INFO L82 PathProgramCache]: Analyzing trace with hash -63941052, now seen corresponding path program 118 times [2021-07-13 19:29:32,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:32,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347978480] [2021-07-13 19:29:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:32,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:32,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347978480] [2021-07-13 19:29:32,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347978480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:32,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602965617] [2021-07-13 19:29:32,205 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 [2021-07-13 19:29:32,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:32,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:32,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:32,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:32,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602965617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:32,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:32,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:32,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906480768] [2021-07-13 19:29:32,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:32,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:32,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:32,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:32,364 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) [2021-07-13 19:29:32,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:32,488 INFO L93 Difference]: Finished difference Result 137 states and 289 transitions. [2021-07-13 19:29:32,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:29:32,489 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 [2021-07-13 19:29:32,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:32,489 INFO L225 Difference]: With dead ends: 137 [2021-07-13 19:29:32,489 INFO L226 Difference]: Without dead ends: 137 [2021-07-13 19:29:32,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:32,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-13 19:29:32,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2021-07-13 19:29:32,490 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) [2021-07-13 19:29:32,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-07-13 19:29:32,490 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-07-13 19:29:32,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:32,491 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-07-13 19:29:32,491 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) [2021-07-13 19:29:32,491 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-07-13 19:29:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:32,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:32,491 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:32,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-07-13 19:29:32,691 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:32,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:32,692 INFO L82 PathProgramCache]: Analyzing trace with hash 223609183, now seen corresponding path program 119 times [2021-07-13 19:29:32,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:32,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383927842] [2021-07-13 19:29:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:32,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:32,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383927842] [2021-07-13 19:29:32,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383927842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:32,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808253297] [2021-07-13 19:29:32,789 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 [2021-07-13 19:29:32,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:29:32,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:32,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:32,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:33,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808253297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:33,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:33,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:33,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686419651] [2021-07-13 19:29:33,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:33,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:33,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:33,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:33,005 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) [2021-07-13 19:29:33,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:33,097 INFO L93 Difference]: Finished difference Result 122 states and 259 transitions. [2021-07-13 19:29:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:29:33,097 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 [2021-07-13 19:29:33,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:33,097 INFO L225 Difference]: With dead ends: 122 [2021-07-13 19:29:33,097 INFO L226 Difference]: Without dead ends: 122 [2021-07-13 19:29:33,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-13 19:29:33,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2021-07-13 19:29:33,099 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) [2021-07-13 19:29:33,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-07-13 19:29:33,099 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-07-13 19:29:33,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:33,099 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-07-13 19:29:33,099 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) [2021-07-13 19:29:33,099 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-07-13 19:29:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:33,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:33,099 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:33,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:33,300 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:33,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:33,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1569801307, now seen corresponding path program 120 times [2021-07-13 19:29:33,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:33,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681373339] [2021-07-13 19:29:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:33,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:33,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681373339] [2021-07-13 19:29:33,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681373339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:33,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261112739] [2021-07-13 19:29:33,391 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 [2021-07-13 19:29:33,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:29:33,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:33,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:33,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:33,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261112739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:33,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:33,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:33,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086232563] [2021-07-13 19:29:33,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:33,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:33,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:33,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:33,530 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) [2021-07-13 19:29:33,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:33,749 INFO L93 Difference]: Finished difference Result 147 states and 302 transitions. [2021-07-13 19:29:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:33,749 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 [2021-07-13 19:29:33,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:33,750 INFO L225 Difference]: With dead ends: 147 [2021-07-13 19:29:33,750 INFO L226 Difference]: Without dead ends: 147 [2021-07-13 19:29:33,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:29:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-13 19:29:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 116. [2021-07-13 19:29:33,751 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) [2021-07-13 19:29:33,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-07-13 19:29:33,751 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 17 [2021-07-13 19:29:33,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:33,751 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-07-13 19:29:33,751 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) [2021-07-13 19:29:33,751 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-07-13 19:29:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:33,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:33,752 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:33,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:33,965 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:33,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:33,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1031945729, now seen corresponding path program 121 times [2021-07-13 19:29:33,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:33,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187605365] [2021-07-13 19:29:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:34,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:34,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187605365] [2021-07-13 19:29:34,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187605365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:34,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159992243] [2021-07-13 19:29:34,078 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 [2021-07-13 19:29:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:34,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:34,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:34,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159992243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:34,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:34,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:34,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268140089] [2021-07-13 19:29:34,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:34,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:34,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:34,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:34,213 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) [2021-07-13 19:29:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:34,346 INFO L93 Difference]: Finished difference Result 128 states and 269 transitions. [2021-07-13 19:29:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:29:34,346 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 [2021-07-13 19:29:34,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:34,346 INFO L225 Difference]: With dead ends: 128 [2021-07-13 19:29:34,347 INFO L226 Difference]: Without dead ends: 128 [2021-07-13 19:29:34,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:34,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-07-13 19:29:34,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-07-13 19:29:34,348 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) [2021-07-13 19:29:34,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-07-13 19:29:34,348 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 17 [2021-07-13 19:29:34,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:34,348 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-07-13 19:29:34,348 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) [2021-07-13 19:29:34,348 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-07-13 19:29:34,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:34,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:34,349 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:34,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:34,561 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:34,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:34,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1247924961, now seen corresponding path program 122 times [2021-07-13 19:29:34,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:34,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212261552] [2021-07-13 19:29:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:34,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:34,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212261552] [2021-07-13 19:29:34,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212261552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:34,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373444507] [2021-07-13 19:29:34,624 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 [2021-07-13 19:29:34,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:34,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:34,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:34,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:34,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373444507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:34,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:34,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:34,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21887024] [2021-07-13 19:29:34,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:34,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:34,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:34,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:34,761 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) [2021-07-13 19:29:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:35,035 INFO L93 Difference]: Finished difference Result 141 states and 287 transitions. [2021-07-13 19:29:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:35,035 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 [2021-07-13 19:29:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:35,036 INFO L225 Difference]: With dead ends: 141 [2021-07-13 19:29:35,036 INFO L226 Difference]: Without dead ends: 139 [2021-07-13 19:29:35,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:29:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-13 19:29:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2021-07-13 19:29:35,037 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) [2021-07-13 19:29:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-07-13 19:29:35,037 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-07-13 19:29:35,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:35,037 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-07-13 19:29:35,038 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) [2021-07-13 19:29:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-07-13 19:29:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:35,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:35,038 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:35,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:35,238 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:35,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:35,239 INFO L82 PathProgramCache]: Analyzing trace with hash 86666369, now seen corresponding path program 123 times [2021-07-13 19:29:35,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:35,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264021621] [2021-07-13 19:29:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:35,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:35,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264021621] [2021-07-13 19:29:35,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264021621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:35,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258429448] [2021-07-13 19:29:35,314 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 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 [2021-07-13 19:29:35,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:29:35,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:35,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:35,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:35,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258429448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:35,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:35,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:35,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212306884] [2021-07-13 19:29:35,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:35,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:35,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:35,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:35,454 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) [2021-07-13 19:29:35,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:35,773 INFO L93 Difference]: Finished difference Result 147 states and 301 transitions. [2021-07-13 19:29:35,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:29:35,774 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 [2021-07-13 19:29:35,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:35,774 INFO L225 Difference]: With dead ends: 147 [2021-07-13 19:29:35,774 INFO L226 Difference]: Without dead ends: 147 [2021-07-13 19:29:35,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:29:35,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-13 19:29:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 117. [2021-07-13 19:29:35,775 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) [2021-07-13 19:29:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-07-13 19:29:35,776 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-07-13 19:29:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:35,776 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-07-13 19:29:35,776 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) [2021-07-13 19:29:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-07-13 19:29:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:35,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:35,776 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:35,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable722 [2021-07-13 19:29:35,977 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:35,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:35,977 INFO L82 PathProgramCache]: Analyzing trace with hash -451189209, now seen corresponding path program 124 times [2021-07-13 19:29:35,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:35,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42539297] [2021-07-13 19:29:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:36,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:36,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42539297] [2021-07-13 19:29:36,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42539297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76020345] [2021-07-13 19:29:36,043 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 [2021-07-13 19:29:36,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:36,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:36,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:36,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:36,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76020345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:36,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:36,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:36,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249539688] [2021-07-13 19:29:36,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:36,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:36,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:36,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:36,182 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) [2021-07-13 19:29:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:36,426 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-07-13 19:29:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:29:36,426 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 [2021-07-13 19:29:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:36,426 INFO L225 Difference]: With dead ends: 139 [2021-07-13 19:29:36,426 INFO L226 Difference]: Without dead ends: 139 [2021-07-13 19:29:36,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 292.9ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:29:36,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-13 19:29:36,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2021-07-13 19:29:36,428 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) [2021-07-13 19:29:36,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-07-13 19:29:36,428 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-07-13 19:29:36,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:36,428 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-07-13 19:29:36,428 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) [2021-07-13 19:29:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-07-13 19:29:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:36,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:36,428 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:36,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:36,629 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:36,629 INFO L82 PathProgramCache]: Analyzing trace with hash 55157057, now seen corresponding path program 125 times [2021-07-13 19:29:36,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:36,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109430114] [2021-07-13 19:29:36,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:36,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:36,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109430114] [2021-07-13 19:29:36,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109430114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:36,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796594773] [2021-07-13 19:29:36,694 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 [2021-07-13 19:29:36,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:29:36,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:36,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:36,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:36,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796594773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:36,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:36,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:36,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878727186] [2021-07-13 19:29:36,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:36,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:36,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:36,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:36,836 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) [2021-07-13 19:29:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:37,029 INFO L93 Difference]: Finished difference Result 132 states and 276 transitions. [2021-07-13 19:29:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:29:37,029 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 [2021-07-13 19:29:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:37,030 INFO L225 Difference]: With dead ends: 132 [2021-07-13 19:29:37,030 INFO L226 Difference]: Without dead ends: 132 [2021-07-13 19:29:37,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:29:37,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-07-13 19:29:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2021-07-13 19:29:37,031 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) [2021-07-13 19:29:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-07-13 19:29:37,031 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-07-13 19:29:37,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:37,031 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-07-13 19:29:37,032 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) [2021-07-13 19:29:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-07-13 19:29:37,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:37,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:37,032 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:37,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-07-13 19:29:37,249 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:37,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:37,249 INFO L82 PathProgramCache]: Analyzing trace with hash -436365568, now seen corresponding path program 126 times [2021-07-13 19:29:37,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:37,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807714144] [2021-07-13 19:29:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:37,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:37,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807714144] [2021-07-13 19:29:37,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807714144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:37,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419863662] [2021-07-13 19:29:37,334 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 [2021-07-13 19:29:37,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:29:37,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:37,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:37,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:37,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419863662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:37,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:37,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:37,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761763744] [2021-07-13 19:29:37,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:37,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:37,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:37,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:37,475 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) [2021-07-13 19:29:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:37,634 INFO L93 Difference]: Finished difference Result 126 states and 264 transitions. [2021-07-13 19:29:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:37,634 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 [2021-07-13 19:29:37,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:37,634 INFO L225 Difference]: With dead ends: 126 [2021-07-13 19:29:37,634 INFO L226 Difference]: Without dead ends: 126 [2021-07-13 19:29:37,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-13 19:29:37,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2021-07-13 19:29:37,636 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) [2021-07-13 19:29:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-07-13 19:29:37,636 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-07-13 19:29:37,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:37,636 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-07-13 19:29:37,636 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) [2021-07-13 19:29:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-07-13 19:29:37,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:37,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:37,636 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:37,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable733,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:37,837 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:37,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:37,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1487766277, now seen corresponding path program 127 times [2021-07-13 19:29:37,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:37,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497305692] [2021-07-13 19:29:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:37,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:37,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497305692] [2021-07-13 19:29:37,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497305692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:37,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234855398] [2021-07-13 19:29:37,922 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 [2021-07-13 19:29:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:37,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:37,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:38,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234855398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:38,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:38,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:38,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381567988] [2021-07-13 19:29:38,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:38,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:38,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:38,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:38,132 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) [2021-07-13 19:29:38,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:38,269 INFO L93 Difference]: Finished difference Result 120 states and 252 transitions. [2021-07-13 19:29:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:29:38,269 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 [2021-07-13 19:29:38,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:38,269 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:29:38,269 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:29:38,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:29:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:29:38,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2021-07-13 19:29:38,271 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) [2021-07-13 19:29:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 232 transitions. [2021-07-13 19:29:38,271 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 232 transitions. Word has length 17 [2021-07-13 19:29:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:38,271 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 232 transitions. [2021-07-13 19:29:38,271 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) [2021-07-13 19:29:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 232 transitions. [2021-07-13 19:29:38,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:38,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:38,271 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:38,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-07-13 19:29:38,485 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:38,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1994112543, now seen corresponding path program 128 times [2021-07-13 19:29:38,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:38,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074139940] [2021-07-13 19:29:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:38,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:38,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074139940] [2021-07-13 19:29:38,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074139940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:38,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011567326] [2021-07-13 19:29:38,571 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 [2021-07-13 19:29:38,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:38,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:38,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:38,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:38,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011567326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:38,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:38,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:38,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408508123] [2021-07-13 19:29:38,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:38,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:38,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:38,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:38,711 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) [2021-07-13 19:29:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:38,890 INFO L93 Difference]: Finished difference Result 145 states and 297 transitions. [2021-07-13 19:29:38,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:29:38,890 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 [2021-07-13 19:29:38,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:38,891 INFO L225 Difference]: With dead ends: 145 [2021-07-13 19:29:38,891 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:29:38,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:29:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2021-07-13 19:29:38,892 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) [2021-07-13 19:29:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 240 transitions. [2021-07-13 19:29:38,892 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 240 transitions. Word has length 17 [2021-07-13 19:29:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:38,892 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 240 transitions. [2021-07-13 19:29:38,892 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) [2021-07-13 19:29:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 240 transitions. [2021-07-13 19:29:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:38,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:38,893 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:39,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-07-13 19:29:39,102 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:39,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:39,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1456256965, now seen corresponding path program 129 times [2021-07-13 19:29:39,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:39,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57133828] [2021-07-13 19:29:39,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:39,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:39,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57133828] [2021-07-13 19:29:39,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57133828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:39,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340098198] [2021-07-13 19:29:39,190 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 [2021-07-13 19:29:39,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:29:39,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:39,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:39,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:39,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340098198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:39,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:39,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:39,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38496674] [2021-07-13 19:29:39,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:39,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:39,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:39,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:39,327 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) [2021-07-13 19:29:39,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:39,470 INFO L93 Difference]: Finished difference Result 129 states and 270 transitions. [2021-07-13 19:29:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:29:39,471 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 [2021-07-13 19:29:39,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:39,471 INFO L225 Difference]: With dead ends: 129 [2021-07-13 19:29:39,471 INFO L226 Difference]: Without dead ends: 129 [2021-07-13 19:29:39,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:29:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-13 19:29:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2021-07-13 19:29:39,472 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) [2021-07-13 19:29:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-07-13 19:29:39,473 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 17 [2021-07-13 19:29:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:39,473 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-07-13 19:29:39,473 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) [2021-07-13 19:29:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-07-13 19:29:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:39,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:39,473 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:39,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:39,689 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:39,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:39,689 INFO L82 PathProgramCache]: Analyzing trace with hash -616418488, now seen corresponding path program 130 times [2021-07-13 19:29:39,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:39,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916288944] [2021-07-13 19:29:39,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:39,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:39,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916288944] [2021-07-13 19:29:39,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916288944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:39,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489658614] [2021-07-13 19:29:39,755 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 [2021-07-13 19:29:39,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:39,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:39,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:39,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:39,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489658614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:39,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:39,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:39,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28237113] [2021-07-13 19:29:39,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:39,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:39,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:39,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:39,946 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) [2021-07-13 19:29:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:40,019 INFO L93 Difference]: Finished difference Result 111 states and 234 transitions. [2021-07-13 19:29:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:29:40,019 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 [2021-07-13 19:29:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:40,020 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:29:40,020 INFO L226 Difference]: Without dead ends: 111 [2021-07-13 19:29:40,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-07-13 19:29:40,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2021-07-13 19:29:40,021 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) [2021-07-13 19:29:40,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-07-13 19:29:40,021 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 17 [2021-07-13 19:29:40,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:40,021 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-07-13 19:29:40,021 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) [2021-07-13 19:29:40,021 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-07-13 19:29:40,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:40,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:40,022 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:40,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:40,239 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:40,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:40,239 INFO L82 PathProgramCache]: Analyzing trace with hash -328868253, now seen corresponding path program 131 times [2021-07-13 19:29:40,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:40,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40020291] [2021-07-13 19:29:40,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:40,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:40,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40020291] [2021-07-13 19:29:40,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40020291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:40,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983807167] [2021-07-13 19:29:40,303 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 [2021-07-13 19:29:40,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:29:40,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:40,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:40,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:40,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983807167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:40,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:40,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:40,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865562687] [2021-07-13 19:29:40,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:40,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:40,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:40,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:40,450 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) [2021-07-13 19:29:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:40,621 INFO L93 Difference]: Finished difference Result 146 states and 291 transitions. [2021-07-13 19:29:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:29:40,622 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 [2021-07-13 19:29:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:40,622 INFO L225 Difference]: With dead ends: 146 [2021-07-13 19:29:40,622 INFO L226 Difference]: Without dead ends: 146 [2021-07-13 19:29:40,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:29:40,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-13 19:29:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-07-13 19:29:40,624 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) [2021-07-13 19:29:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 240 transitions. [2021-07-13 19:29:40,624 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 240 transitions. Word has length 17 [2021-07-13 19:29:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:40,624 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 240 transitions. [2021-07-13 19:29:40,624 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) [2021-07-13 19:29:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 240 transitions. [2021-07-13 19:29:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:40,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:40,624 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:40,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-07-13 19:29:40,825 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash -26877973, now seen corresponding path program 132 times [2021-07-13 19:29:40,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:40,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566233976] [2021-07-13 19:29:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:40,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:40,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566233976] [2021-07-13 19:29:40,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566233976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:40,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033258195] [2021-07-13 19:29:40,893 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 [2021-07-13 19:29:40,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:40,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:40,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:40,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:41,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033258195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:41,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:41,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:41,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103744648] [2021-07-13 19:29:41,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:41,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:41,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:41,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:41,050 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) [2021-07-13 19:29:41,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:41,162 INFO L93 Difference]: Finished difference Result 135 states and 282 transitions. [2021-07-13 19:29:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:29:41,163 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 [2021-07-13 19:29:41,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:41,163 INFO L225 Difference]: With dead ends: 135 [2021-07-13 19:29:41,163 INFO L226 Difference]: Without dead ends: 135 [2021-07-13 19:29:41,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:41,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-13 19:29:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-07-13 19:29:41,164 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) [2021-07-13 19:29:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 238 transitions. [2021-07-13 19:29:41,165 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 238 transitions. Word has length 17 [2021-07-13 19:29:41,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:41,165 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 238 transitions. [2021-07-13 19:29:41,165 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) [2021-07-13 19:29:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 238 transitions. [2021-07-13 19:29:41,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:41,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:41,165 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:41,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-07-13 19:29:41,366 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:41,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:41,366 INFO L82 PathProgramCache]: Analyzing trace with hash 479468293, now seen corresponding path program 133 times [2021-07-13 19:29:41,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:41,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431997567] [2021-07-13 19:29:41,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:41,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:41,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431997567] [2021-07-13 19:29:41,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431997567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:41,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560151709] [2021-07-13 19:29:41,431 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 [2021-07-13 19:29:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:41,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:41,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:41,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560151709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:41,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:41,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:41,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738963782] [2021-07-13 19:29:41,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:41,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:41,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:41,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:41,569 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) [2021-07-13 19:29:41,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:41,756 INFO L93 Difference]: Finished difference Result 125 states and 260 transitions. [2021-07-13 19:29:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:29:41,756 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 [2021-07-13 19:29:41,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:41,757 INFO L225 Difference]: With dead ends: 125 [2021-07-13 19:29:41,757 INFO L226 Difference]: Without dead ends: 125 [2021-07-13 19:29:41,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:29:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-13 19:29:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2021-07-13 19:29:41,758 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) [2021-07-13 19:29:41,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 218 transitions. [2021-07-13 19:29:41,758 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 218 transitions. Word has length 17 [2021-07-13 19:29:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:41,758 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 218 transitions. [2021-07-13 19:29:41,758 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) [2021-07-13 19:29:41,759 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 218 transitions. [2021-07-13 19:29:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:41,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:41,759 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:41,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-07-13 19:29:41,973 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:41,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:41,973 INFO L82 PathProgramCache]: Analyzing trace with hash 21357727, now seen corresponding path program 134 times [2021-07-13 19:29:41,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:41,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849121958] [2021-07-13 19:29:41,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:42,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:42,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849121958] [2021-07-13 19:29:42,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849121958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:42,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546476889] [2021-07-13 19:29:42,041 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 [2021-07-13 19:29:42,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:42,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:42,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:42,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:42,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546476889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:42,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:42,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:42,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119336277] [2021-07-13 19:29:42,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:42,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:42,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:42,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:42,214 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) [2021-07-13 19:29:42,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:42,407 INFO L93 Difference]: Finished difference Result 156 states and 309 transitions. [2021-07-13 19:29:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:29:42,408 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 [2021-07-13 19:29:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:42,409 INFO L225 Difference]: With dead ends: 156 [2021-07-13 19:29:42,409 INFO L226 Difference]: Without dead ends: 154 [2021-07-13 19:29:42,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:29:42,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-13 19:29:42,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 112. [2021-07-13 19:29:42,411 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) [2021-07-13 19:29:42,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-07-13 19:29:42,411 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 17 [2021-07-13 19:29:42,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:42,411 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-07-13 19:29:42,411 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) [2021-07-13 19:29:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-07-13 19:29:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:42,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:42,411 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:42,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable767,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:42,612 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:42,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1355949057, now seen corresponding path program 135 times [2021-07-13 19:29:42,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:42,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817715455] [2021-07-13 19:29:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:42,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:42,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817715455] [2021-07-13 19:29:42,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817715455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:42,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802571956] [2021-07-13 19:29:42,675 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 [2021-07-13 19:29:42,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:29:42,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:42,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:42,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:42,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802571956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:42,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:42,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:42,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877918215] [2021-07-13 19:29:42,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:42,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:42,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:42,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:42,818 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) [2021-07-13 19:29:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:43,065 INFO L93 Difference]: Finished difference Result 158 states and 315 transitions. [2021-07-13 19:29:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:29:43,066 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 [2021-07-13 19:29:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:43,066 INFO L225 Difference]: With dead ends: 158 [2021-07-13 19:29:43,066 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 19:29:43,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:29:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 19:29:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2021-07-13 19:29:43,067 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) [2021-07-13 19:29:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 235 transitions. [2021-07-13 19:29:43,068 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 235 transitions. Word has length 17 [2021-07-13 19:29:43,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:43,068 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 235 transitions. [2021-07-13 19:29:43,068 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) [2021-07-13 19:29:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 235 transitions. [2021-07-13 19:29:43,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:43,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:43,068 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:43,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-07-13 19:29:43,269 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:43,269 INFO L82 PathProgramCache]: Analyzing trace with hash 818093479, now seen corresponding path program 136 times [2021-07-13 19:29:43,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:43,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505738217] [2021-07-13 19:29:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:43,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:43,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505738217] [2021-07-13 19:29:43,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505738217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:43,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056781594] [2021-07-13 19:29:43,334 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 [2021-07-13 19:29:43,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:43,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:43,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:43,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:43,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056781594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:43,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:43,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:29:43,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404392151] [2021-07-13 19:29:43,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:29:43,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:43,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:29:43,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:29:43,476 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) [2021-07-13 19:29:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:43,624 INFO L93 Difference]: Finished difference Result 157 states and 319 transitions. [2021-07-13 19:29:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:43,625 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 [2021-07-13 19:29:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:43,625 INFO L225 Difference]: With dead ends: 157 [2021-07-13 19:29:43,625 INFO L226 Difference]: Without dead ends: 157 [2021-07-13 19:29:43,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:29:43,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-13 19:29:43,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2021-07-13 19:29:43,627 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) [2021-07-13 19:29:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-07-13 19:29:43,627 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-07-13 19:29:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:43,627 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-07-13 19:29:43,627 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) [2021-07-13 19:29:43,627 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-07-13 19:29:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:43,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:43,627 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:43,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable778 [2021-07-13 19:29:43,841 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:43,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1324439745, now seen corresponding path program 137 times [2021-07-13 19:29:43,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:43,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774842545] [2021-07-13 19:29:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:43,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:43,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774842545] [2021-07-13 19:29:43,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774842545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:43,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414124701] [2021-07-13 19:29:43,905 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 [2021-07-13 19:29:43,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:29:43,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:43,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-13 19:29:43,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:44,285 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-13 19:29:44,481 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:29:44,482 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 [2021-07-13 19:29:44,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:44,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:29:44,518 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 19:29:44,519 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 [2021-07-13 19:29:44,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:44,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:29:44,543 INFO L518 ElimStorePlain]: Eliminatee scoreA vanished before elimination [2021-07-13 19:29:44,543 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-07-13 19:29:44,550 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 19:29:44,550 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 [2021-07-13 19:29:44,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:44,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:29:44,574 INFO L518 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2021-07-13 19:29:44,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:29:44,591 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 9 variables, input treesize:115, output treesize:50 [2021-07-13 19:29:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:44,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414124701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:44,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:44,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:29:44,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23804391] [2021-07-13 19:29:44,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:29:44,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:44,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:29:44,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:29:44,637 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) [2021-07-13 19:29:45,024 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-07-13 19:29:45,216 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-07-13 19:29:45,437 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-07-13 19:29:45,660 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-07-13 19:29:45,907 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-07-13 19:29:46,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:46,226 INFO L93 Difference]: Finished difference Result 205 states and 400 transitions. [2021-07-13 19:29:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:29:46,226 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 [2021-07-13 19:29:46,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:46,226 INFO L225 Difference]: With dead ends: 205 [2021-07-13 19:29:46,226 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 19:29:46,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1836.8ms TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:29:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 19:29:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 109. [2021-07-13 19:29:46,228 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) [2021-07-13 19:29:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 231 transitions. [2021-07-13 19:29:46,228 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 231 transitions. Word has length 17 [2021-07-13 19:29:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:46,228 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 231 transitions. [2021-07-13 19:29:46,228 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) [2021-07-13 19:29:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 231 transitions. [2021-07-13 19:29:46,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:29:46,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:46,229 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:46,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable781 [2021-07-13 19:29:46,429 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:46,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:46,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1767338885, now seen corresponding path program 138 times [2021-07-13 19:29:46,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:46,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793603668] [2021-07-13 19:29:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:46,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:46,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793603668] [2021-07-13 19:29:46,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793603668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:46,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941528355] [2021-07-13 19:29:46,497 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 [2021-07-13 19:29:46,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:46,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:46,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:29:46,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:46,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941528355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:46,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:46,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:29:46,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380096747] [2021-07-13 19:29:46,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:29:46,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:46,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:29:46,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:29:46,654 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) [2021-07-13 19:29:46,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:46,925 INFO L93 Difference]: Finished difference Result 157 states and 318 transitions. [2021-07-13 19:29:46,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:29:46,926 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 [2021-07-13 19:29:46,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:46,926 INFO L225 Difference]: With dead ends: 157 [2021-07-13 19:29:46,926 INFO L226 Difference]: Without dead ends: 157 [2021-07-13 19:29:46,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 280.2ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:29:46,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-13 19:29:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 104. [2021-07-13 19:29:46,927 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) [2021-07-13 19:29:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 218 transitions. [2021-07-13 19:29:46,928 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 218 transitions. Word has length 17 [2021-07-13 19:29:46,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:46,928 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 218 transitions. [2021-07-13 19:29:46,928 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) [2021-07-13 19:29:46,928 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 218 transitions. [2021-07-13 19:29:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:29:46,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:46,928 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:47,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:47,129 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:47,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:47,129 INFO L82 PathProgramCache]: Analyzing trace with hash 316048736, now seen corresponding path program 139 times [2021-07-13 19:29:47,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:47,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137626305] [2021-07-13 19:29:47,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:47,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:47,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137626305] [2021-07-13 19:29:47,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137626305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:47,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643400983] [2021-07-13 19:29:47,269 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 [2021-07-13 19:29:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:47,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:29:47,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:47,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643400983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:47,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:47,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:29:47,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192894025] [2021-07-13 19:29:47,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:29:47,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:47,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:29:47,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:29:47,628 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) [2021-07-13 19:29:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:48,141 INFO L93 Difference]: Finished difference Result 167 states and 331 transitions. [2021-07-13 19:29:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:29:48,142 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 [2021-07-13 19:29:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:48,142 INFO L225 Difference]: With dead ends: 167 [2021-07-13 19:29:48,142 INFO L226 Difference]: Without dead ends: 150 [2021-07-13 19:29:48,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 737.0ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:29:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-13 19:29:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 105. [2021-07-13 19:29:48,144 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) [2021-07-13 19:29:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 220 transitions. [2021-07-13 19:29:48,144 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 220 transitions. Word has length 18 [2021-07-13 19:29:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:48,144 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 220 transitions. [2021-07-13 19:29:48,144 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) [2021-07-13 19:29:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 220 transitions. [2021-07-13 19:29:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:29:48,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:48,144 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:48,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-07-13 19:29:48,345 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:48,345 INFO L82 PathProgramCache]: Analyzing trace with hash -37090754, now seen corresponding path program 140 times [2021-07-13 19:29:48,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:48,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841144243] [2021-07-13 19:29:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:48,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:48,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841144243] [2021-07-13 19:29:48,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841144243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:48,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335814462] [2021-07-13 19:29:48,678 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 [2021-07-13 19:29:48,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:29:48,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:48,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:48,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:49,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335814462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:49,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:49,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:29:49,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978742750] [2021-07-13 19:29:49,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:29:49,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:49,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:29:49,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:29:49,091 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) [2021-07-13 19:29:49,463 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-07-13 19:29:49,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:49,935 INFO L93 Difference]: Finished difference Result 166 states and 330 transitions. [2021-07-13 19:29:49,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:49,936 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 [2021-07-13 19:29:49,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:49,936 INFO L225 Difference]: With dead ends: 166 [2021-07-13 19:29:49,936 INFO L226 Difference]: Without dead ends: 151 [2021-07-13 19:29:49,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1269.0ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:29:49,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-13 19:29:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2021-07-13 19:29:49,938 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) [2021-07-13 19:29:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 222 transitions. [2021-07-13 19:29:49,938 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 222 transitions. Word has length 18 [2021-07-13 19:29:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:49,938 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 222 transitions. [2021-07-13 19:29:49,938 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) [2021-07-13 19:29:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 222 transitions. [2021-07-13 19:29:49,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:29:49,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:49,938 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:50,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:50,155 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:50,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1690044128, now seen corresponding path program 141 times [2021-07-13 19:29:50,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:50,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414992488] [2021-07-13 19:29:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:50,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:50,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414992488] [2021-07-13 19:29:50,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414992488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:50,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475166795] [2021-07-13 19:29:50,461 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 [2021-07-13 19:29:50,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:29:50,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:50,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:29:50,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:50,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475166795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:50,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:50,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:29:50,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135072907] [2021-07-13 19:29:50,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:29:50,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:50,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:29:50,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:29:50,890 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) [2021-07-13 19:29:51,586 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-07-13 19:29:51,744 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-07-13 19:29:51,985 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2021-07-13 19:29:52,131 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-07-13 19:29:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:52,272 INFO L93 Difference]: Finished difference Result 187 states and 361 transitions. [2021-07-13 19:29:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:29:52,272 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 [2021-07-13 19:29:52,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:52,273 INFO L225 Difference]: With dead ends: 187 [2021-07-13 19:29:52,273 INFO L226 Difference]: Without dead ends: 180 [2021-07-13 19:29:52,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1728.7ms TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:29:52,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-13 19:29:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 107. [2021-07-13 19:29:52,274 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) [2021-07-13 19:29:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 225 transitions. [2021-07-13 19:29:52,275 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 225 transitions. Word has length 18 [2021-07-13 19:29:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:52,275 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 225 transitions. [2021-07-13 19:29:52,275 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) [2021-07-13 19:29:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 225 transitions. [2021-07-13 19:29:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:29:52,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:52,275 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:52,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:52,476 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:52,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:52,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1027581438, now seen corresponding path program 142 times [2021-07-13 19:29:52,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:52,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493235507] [2021-07-13 19:29:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:52,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:52,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493235507] [2021-07-13 19:29:52,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493235507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:52,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425919578] [2021-07-13 19:29:52,843 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 [2021-07-13 19:29:52,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:52,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:52,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:52,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:53,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425919578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:53,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:53,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:29:53,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082511979] [2021-07-13 19:29:53,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:29:53,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:53,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:29:53,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:29:53,299 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) [2021-07-13 19:29:54,326 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2021-07-13 19:29:54,571 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 59 [2021-07-13 19:29:54,807 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 74 [2021-07-13 19:29:55,005 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-07-13 19:29:55,172 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 61 [2021-07-13 19:29:55,326 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 55 [2021-07-13 19:29:55,472 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 56 [2021-07-13 19:29:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:55,489 INFO L93 Difference]: Finished difference Result 207 states and 398 transitions. [2021-07-13 19:29:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:29:55,489 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 [2021-07-13 19:29:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:55,490 INFO L225 Difference]: With dead ends: 207 [2021-07-13 19:29:55,490 INFO L226 Difference]: Without dead ends: 181 [2021-07-13 19:29:55,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2572.4ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:29:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-07-13 19:29:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 112. [2021-07-13 19:29:55,491 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) [2021-07-13 19:29:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-07-13 19:29:55,492 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 18 [2021-07-13 19:29:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:55,492 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-07-13 19:29:55,492 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) [2021-07-13 19:29:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-07-13 19:29:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:29:55,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:55,492 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:55,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:55,693 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash 2075337876, now seen corresponding path program 143 times [2021-07-13 19:29:55,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:55,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373634018] [2021-07-13 19:29:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:55,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:55,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373634018] [2021-07-13 19:29:55,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373634018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:55,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915256687] [2021-07-13 19:29:55,884 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 [2021-07-13 19:29:55,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:29:55,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:55,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:55,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:56,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915256687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:56,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:56,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:29:56,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17877575] [2021-07-13 19:29:56,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:29:56,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:56,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:29:56,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:29:56,280 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) [2021-07-13 19:29:56,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:56,850 INFO L93 Difference]: Finished difference Result 137 states and 274 transitions. [2021-07-13 19:29:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:29:56,851 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 [2021-07-13 19:29:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:56,851 INFO L225 Difference]: With dead ends: 137 [2021-07-13 19:29:56,851 INFO L226 Difference]: Without dead ends: 122 [2021-07-13 19:29:56,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 819.8ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:29:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-13 19:29:56,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2021-07-13 19:29:56,852 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) [2021-07-13 19:29:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-07-13 19:29:56,853 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 18 [2021-07-13 19:29:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:56,853 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-07-13 19:29:56,853 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) [2021-07-13 19:29:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-07-13 19:29:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:29:56,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:56,853 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:57,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-07-13 19:29:57,069 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:57,069 INFO L82 PathProgramCache]: Analyzing trace with hash 422384502, now seen corresponding path program 144 times [2021-07-13 19:29:57,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:57,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910638732] [2021-07-13 19:29:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:57,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:57,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910638732] [2021-07-13 19:29:57,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910638732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:57,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511784395] [2021-07-13 19:29:57,299 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 [2021-07-13 19:29:57,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:29:57,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:57,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:57,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:57,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511784395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:57,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:57,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:29:57,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562789990] [2021-07-13 19:29:57,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:29:57,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:57,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:29:57,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:29:57,716 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) [2021-07-13 19:29:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:58,400 INFO L93 Difference]: Finished difference Result 142 states and 291 transitions. [2021-07-13 19:29:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:29:58,400 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 [2021-07-13 19:29:58,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:58,401 INFO L225 Difference]: With dead ends: 142 [2021-07-13 19:29:58,401 INFO L226 Difference]: Without dead ends: 129 [2021-07-13 19:29:58,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 946.9ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:29:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-13 19:29:58,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2021-07-13 19:29:58,402 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) [2021-07-13 19:29:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 240 transitions. [2021-07-13 19:29:58,402 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 240 transitions. Word has length 18 [2021-07-13 19:29:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:58,402 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 240 transitions. [2021-07-13 19:29:58,403 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) [2021-07-13 19:29:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 240 transitions. [2021-07-13 19:29:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:29:58,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:58,403 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:58,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-07-13 19:29:58,603 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:58,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1154957228, now seen corresponding path program 145 times [2021-07-13 19:29:58,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:58,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558560552] [2021-07-13 19:29:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:58,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:58,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558560552] [2021-07-13 19:29:58,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558560552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:58,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168633371] [2021-07-13 19:29:58,810 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 [2021-07-13 19:29:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:58,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:29:58,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:59,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168633371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:59,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:59,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:29:59,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965842430] [2021-07-13 19:29:59,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:29:59,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:59,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:29:59,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:29:59,224 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) [2021-07-13 19:30:00,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:00,055 INFO L93 Difference]: Finished difference Result 148 states and 296 transitions. [2021-07-13 19:30:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:30:00,055 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 [2021-07-13 19:30:00,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:00,055 INFO L225 Difference]: With dead ends: 148 [2021-07-13 19:30:00,056 INFO L226 Difference]: Without dead ends: 141 [2021-07-13 19:30:00,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1026.1ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:30:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-13 19:30:00,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2021-07-13 19:30:00,057 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) [2021-07-13 19:30:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 243 transitions. [2021-07-13 19:30:00,057 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 243 transitions. Word has length 18 [2021-07-13 19:30:00,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:00,057 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 243 transitions. [2021-07-13 19:30:00,057 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) [2021-07-13 19:30:00,057 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 243 transitions. [2021-07-13 19:30:00,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:00,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:00,058 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:00,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-07-13 19:30:00,258 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:00,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:00,258 INFO L82 PathProgramCache]: Analyzing trace with hash 179634102, now seen corresponding path program 146 times [2021-07-13 19:30:00,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:00,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694293186] [2021-07-13 19:30:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:00,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:00,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694293186] [2021-07-13 19:30:00,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694293186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:00,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249215081] [2021-07-13 19:30:00,448 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 [2021-07-13 19:30:00,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:30:00,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:00,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:00,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:00,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249215081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:00,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:00,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:30:00,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213924288] [2021-07-13 19:30:00,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:30:00,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:00,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:30:00,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:30:00,883 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) [2021-07-13 19:30:01,520 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-07-13 19:30:01,718 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-07-13 19:30:01,849 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-07-13 19:30:02,015 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-07-13 19:30:02,249 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-07-13 19:30:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:02,767 INFO L93 Difference]: Finished difference Result 249 states and 458 transitions. [2021-07-13 19:30:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:30:02,767 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 [2021-07-13 19:30:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:02,768 INFO L225 Difference]: With dead ends: 249 [2021-07-13 19:30:02,768 INFO L226 Difference]: Without dead ends: 212 [2021-07-13 19:30:02,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2048.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:30:02,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-07-13 19:30:02,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 120. [2021-07-13 19:30:02,770 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) [2021-07-13 19:30:02,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-07-13 19:30:02,770 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 18 [2021-07-13 19:30:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:02,770 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-07-13 19:30:02,770 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) [2021-07-13 19:30:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-07-13 19:30:02,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:02,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:02,770 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:02,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable875 [2021-07-13 19:30:02,971 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1060750436, now seen corresponding path program 147 times [2021-07-13 19:30:02,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:02,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134903693] [2021-07-13 19:30:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:03,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:03,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134903693] [2021-07-13 19:30:03,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134903693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:03,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658100189] [2021-07-13 19:30:03,161 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 [2021-07-13 19:30:03,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:30:03,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:03,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:03,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:03,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658100189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:03,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:03,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:03,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684578295] [2021-07-13 19:30:03,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:03,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:03,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:03,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:03,527 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) [2021-07-13 19:30:03,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:03,902 INFO L93 Difference]: Finished difference Result 146 states and 301 transitions. [2021-07-13 19:30:03,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:30:03,903 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 [2021-07-13 19:30:03,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:03,903 INFO L225 Difference]: With dead ends: 146 [2021-07-13 19:30:03,903 INFO L226 Difference]: Without dead ends: 133 [2021-07-13 19:30:03,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 634.8ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:30:03,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-13 19:30:03,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2021-07-13 19:30:03,904 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) [2021-07-13 19:30:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 268 transitions. [2021-07-13 19:30:03,905 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 268 transitions. Word has length 18 [2021-07-13 19:30:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:03,905 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 268 transitions. [2021-07-13 19:30:03,905 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) [2021-07-13 19:30:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 268 transitions. [2021-07-13 19:30:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:03,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:03,905 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:04,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable888,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:04,106 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:04,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:04,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1656875130, now seen corresponding path program 148 times [2021-07-13 19:30:04,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:04,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375694821] [2021-07-13 19:30:04,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:04,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:04,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375694821] [2021-07-13 19:30:04,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375694821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:04,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286865885] [2021-07-13 19:30:04,289 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 [2021-07-13 19:30:04,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:04,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:04,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:04,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:04,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286865885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:04,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:04,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:04,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448557788] [2021-07-13 19:30:04,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:04,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:04,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:04,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:04,676 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) [2021-07-13 19:30:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:05,387 INFO L93 Difference]: Finished difference Result 171 states and 342 transitions. [2021-07-13 19:30:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:30:05,387 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 [2021-07-13 19:30:05,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:05,388 INFO L225 Difference]: With dead ends: 171 [2021-07-13 19:30:05,388 INFO L226 Difference]: Without dead ends: 160 [2021-07-13 19:30:05,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 922.0ms TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:30:05,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-13 19:30:05,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 125. [2021-07-13 19:30:05,389 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) [2021-07-13 19:30:05,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 270 transitions. [2021-07-13 19:30:05,390 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 270 transitions. Word has length 18 [2021-07-13 19:30:05,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:05,390 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 270 transitions. [2021-07-13 19:30:05,390 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) [2021-07-13 19:30:05,390 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 270 transitions. [2021-07-13 19:30:05,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:05,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:05,390 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:05,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable899 [2021-07-13 19:30:05,591 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:05,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:05,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1303500836, now seen corresponding path program 149 times [2021-07-13 19:30:05,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:05,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948902960] [2021-07-13 19:30:05,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:05,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:05,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948902960] [2021-07-13 19:30:05,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948902960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:05,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413653378] [2021-07-13 19:30:05,741 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 [2021-07-13 19:30:05,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:30:05,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:05,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:30:05,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:06,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413653378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:06,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:06,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:06,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107139166] [2021-07-13 19:30:06,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:06,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:06,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:06,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:06,118 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) [2021-07-13 19:30:06,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:06,979 INFO L93 Difference]: Finished difference Result 224 states and 435 transitions. [2021-07-13 19:30:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:30:06,979 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 [2021-07-13 19:30:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:06,980 INFO L225 Difference]: With dead ends: 224 [2021-07-13 19:30:06,980 INFO L226 Difference]: Without dead ends: 198 [2021-07-13 19:30:06,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1015.8ms TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:30:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-07-13 19:30:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 128. [2021-07-13 19:30:06,982 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) [2021-07-13 19:30:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 276 transitions. [2021-07-13 19:30:06,982 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 276 transitions. Word has length 18 [2021-07-13 19:30:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:06,982 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 276 transitions. [2021-07-13 19:30:06,982 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) [2021-07-13 19:30:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 276 transitions. [2021-07-13 19:30:06,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:06,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:06,982 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:07,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-07-13 19:30:07,183 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:07,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2131745900, now seen corresponding path program 150 times [2021-07-13 19:30:07,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:07,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575434177] [2021-07-13 19:30:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:07,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:07,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575434177] [2021-07-13 19:30:07,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575434177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:07,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484182576] [2021-07-13 19:30:07,394 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 [2021-07-13 19:30:07,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:30:07,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:07,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:30:07,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:07,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484182576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:07,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:07,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:07,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111520069] [2021-07-13 19:30:07,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:07,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:07,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:07,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:07,729 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) [2021-07-13 19:30:08,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:08,775 INFO L93 Difference]: Finished difference Result 225 states and 449 transitions. [2021-07-13 19:30:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:30:08,776 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 [2021-07-13 19:30:08,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:08,776 INFO L225 Difference]: With dead ends: 225 [2021-07-13 19:30:08,776 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 19:30:08,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1187.3ms TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:30:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 19:30:08,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 135. [2021-07-13 19:30:08,778 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) [2021-07-13 19:30:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 294 transitions. [2021-07-13 19:30:08,778 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 294 transitions. Word has length 18 [2021-07-13 19:30:08,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:08,778 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 294 transitions. [2021-07-13 19:30:08,778 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) [2021-07-13 19:30:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 294 transitions. [2021-07-13 19:30:08,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:08,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:08,779 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:08,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:08,979 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:08,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:08,979 INFO L82 PathProgramCache]: Analyzing trace with hash -797154570, now seen corresponding path program 151 times [2021-07-13 19:30:08,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:08,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759528818] [2021-07-13 19:30:08,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:09,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:09,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759528818] [2021-07-13 19:30:09,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759528818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:09,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36455006] [2021-07-13 19:30:09,123 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 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 [2021-07-13 19:30:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:09,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:09,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:09,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36455006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:09,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:09,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:09,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557349548] [2021-07-13 19:30:09,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:09,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:09,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:09,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:09,489 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) [2021-07-13 19:30:09,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:09,943 INFO L93 Difference]: Finished difference Result 198 states and 397 transitions. [2021-07-13 19:30:09,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:30:09,943 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 [2021-07-13 19:30:09,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:09,943 INFO L225 Difference]: With dead ends: 198 [2021-07-13 19:30:09,944 INFO L226 Difference]: Without dead ends: 179 [2021-07-13 19:30:09,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 613.3ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:30:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-13 19:30:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2021-07-13 19:30:09,945 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) [2021-07-13 19:30:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 300 transitions. [2021-07-13 19:30:09,945 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 300 transitions. Word has length 18 [2021-07-13 19:30:09,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:09,946 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 300 transitions. [2021-07-13 19:30:09,946 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) [2021-07-13 19:30:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 300 transitions. [2021-07-13 19:30:09,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:09,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:09,946 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:10,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable935 [2021-07-13 19:30:10,146 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:10,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:10,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1335010148, now seen corresponding path program 152 times [2021-07-13 19:30:10,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:10,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060467523] [2021-07-13 19:30:10,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:10,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:10,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060467523] [2021-07-13 19:30:10,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060467523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:10,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711537269] [2021-07-13 19:30:10,323 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 [2021-07-13 19:30:10,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:30:10,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:10,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:10,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:10,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711537269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:10,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:10,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:10,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129883740] [2021-07-13 19:30:10,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:10,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:10,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:10,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:10,717 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) [2021-07-13 19:30:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:11,092 INFO L93 Difference]: Finished difference Result 206 states and 421 transitions. [2021-07-13 19:30:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:30:11,093 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 [2021-07-13 19:30:11,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:11,093 INFO L225 Difference]: With dead ends: 206 [2021-07-13 19:30:11,093 INFO L226 Difference]: Without dead ends: 187 [2021-07-13 19:30:11,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 635.5ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:30:11,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-13 19:30:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2021-07-13 19:30:11,095 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) [2021-07-13 19:30:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 305 transitions. [2021-07-13 19:30:11,095 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 305 transitions. Word has length 18 [2021-07-13 19:30:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:11,095 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 305 transitions. [2021-07-13 19:30:11,095 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) [2021-07-13 19:30:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 305 transitions. [2021-07-13 19:30:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:11,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:11,099 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:11,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:11,299 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:11,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:11,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1158851330, now seen corresponding path program 153 times [2021-07-13 19:30:11,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:11,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416052827] [2021-07-13 19:30:11,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:11,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:11,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416052827] [2021-07-13 19:30:11,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416052827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:11,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678679101] [2021-07-13 19:30:11,580 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 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 [2021-07-13 19:30:11,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:30:11,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:11,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:30:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:11,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678679101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:11,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:11,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:30:11,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977870575] [2021-07-13 19:30:11,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:30:11,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:11,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:30:11,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:30:11,980 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) [2021-07-13 19:30:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:12,527 INFO L93 Difference]: Finished difference Result 172 states and 355 transitions. [2021-07-13 19:30:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:30:12,528 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 [2021-07-13 19:30:12,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:12,528 INFO L225 Difference]: With dead ends: 172 [2021-07-13 19:30:12,528 INFO L226 Difference]: Without dead ends: 165 [2021-07-13 19:30:12,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 897.1ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:30:12,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-13 19:30:12,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2021-07-13 19:30:12,530 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) [2021-07-13 19:30:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 311 transitions. [2021-07-13 19:30:12,530 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 311 transitions. Word has length 18 [2021-07-13 19:30:12,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:12,530 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 311 transitions. [2021-07-13 19:30:12,530 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) [2021-07-13 19:30:12,530 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 311 transitions. [2021-07-13 19:30:12,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:12,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:12,530 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:12,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable960 [2021-07-13 19:30:12,731 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:12,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:12,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1483162592, now seen corresponding path program 154 times [2021-07-13 19:30:12,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:12,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559683400] [2021-07-13 19:30:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:12,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:12,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559683400] [2021-07-13 19:30:12,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559683400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:12,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324164270] [2021-07-13 19:30:12,944 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 [2021-07-13 19:30:12,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:12,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:12,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:30:12,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:13,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324164270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:13,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:13,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:30:13,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671150218] [2021-07-13 19:30:13,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:30:13,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:13,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:30:13,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:30:13,336 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) [2021-07-13 19:30:14,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:14,124 INFO L93 Difference]: Finished difference Result 179 states and 367 transitions. [2021-07-13 19:30:14,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:30:14,124 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 [2021-07-13 19:30:14,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:14,125 INFO L225 Difference]: With dead ends: 179 [2021-07-13 19:30:14,125 INFO L226 Difference]: Without dead ends: 172 [2021-07-13 19:30:14,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1049.3ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:30:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-13 19:30:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 143. [2021-07-13 19:30:14,127 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) [2021-07-13 19:30:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 314 transitions. [2021-07-13 19:30:14,127 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 314 transitions. Word has length 18 [2021-07-13 19:30:14,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:14,127 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 314 transitions. [2021-07-13 19:30:14,127 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) [2021-07-13 19:30:14,127 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 314 transitions. [2021-07-13 19:30:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:14,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:14,127 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:14,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable973 [2021-07-13 19:30:14,328 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:14,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:14,328 INFO L82 PathProgramCache]: Analyzing trace with hash -94179138, now seen corresponding path program 155 times [2021-07-13 19:30:14,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:14,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134390792] [2021-07-13 19:30:14,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:14,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:14,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134390792] [2021-07-13 19:30:14,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134390792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:14,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602304698] [2021-07-13 19:30:14,578 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 [2021-07-13 19:30:14,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:30:14,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:14,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:14,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:15,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602304698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:15,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:15,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:30:15,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245043199] [2021-07-13 19:30:15,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:30:15,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:15,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:30:15,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:30:15,001 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) [2021-07-13 19:30:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:15,975 INFO L93 Difference]: Finished difference Result 193 states and 393 transitions. [2021-07-13 19:30:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:30:15,975 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 [2021-07-13 19:30:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:15,975 INFO L225 Difference]: With dead ends: 193 [2021-07-13 19:30:15,975 INFO L226 Difference]: Without dead ends: 167 [2021-07-13 19:30:15,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1222.3ms TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:30:15,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-13 19:30:15,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 143. [2021-07-13 19:30:15,977 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) [2021-07-13 19:30:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 315 transitions. [2021-07-13 19:30:15,977 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 315 transitions. Word has length 18 [2021-07-13 19:30:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:15,978 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 315 transitions. [2021-07-13 19:30:15,978 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) [2021-07-13 19:30:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 315 transitions. [2021-07-13 19:30:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:15,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:15,978 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:16,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable986,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:16,193 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:16,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:16,193 INFO L82 PathProgramCache]: Analyzing trace with hash -242722746, now seen corresponding path program 156 times [2021-07-13 19:30:16,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:16,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293206871] [2021-07-13 19:30:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:16,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:16,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293206871] [2021-07-13 19:30:16,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293206871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:16,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849586562] [2021-07-13 19:30:16,334 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 [2021-07-13 19:30:16,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:30:16,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:16,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:16,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:16,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849586562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:16,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:16,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:16,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403865512] [2021-07-13 19:30:16,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:16,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:16,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:16,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:16,717 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) [2021-07-13 19:30:17,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:17,515 INFO L93 Difference]: Finished difference Result 237 states and 471 transitions. [2021-07-13 19:30:17,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:30:17,515 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 [2021-07-13 19:30:17,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:17,516 INFO L225 Difference]: With dead ends: 237 [2021-07-13 19:30:17,516 INFO L226 Difference]: Without dead ends: 211 [2021-07-13 19:30:17,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 919.4ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:30:17,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-13 19:30:17,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 141. [2021-07-13 19:30:17,518 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) [2021-07-13 19:30:17,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 311 transitions. [2021-07-13 19:30:17,518 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 311 transitions. Word has length 18 [2021-07-13 19:30:17,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:17,518 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 311 transitions. [2021-07-13 19:30:17,518 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) [2021-07-13 19:30:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 311 transitions. [2021-07-13 19:30:17,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:17,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:17,518 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:17,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-07-13 19:30:17,735 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:17,735 INFO L82 PathProgramCache]: Analyzing trace with hash -863772573, now seen corresponding path program 157 times [2021-07-13 19:30:17,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:17,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553272428] [2021-07-13 19:30:17,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:30:17,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:17,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553272428] [2021-07-13 19:30:17,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553272428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:17,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325310490] [2021-07-13 19:30:17,809 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 [2021-07-13 19:30:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:17,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:30:17,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:30:17,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325310490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:17,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:17,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:30:17,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513852483] [2021-07-13 19:30:17,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:30:17,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:17,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:30:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:30:17,960 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) [2021-07-13 19:30:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:18,069 INFO L93 Difference]: Finished difference Result 164 states and 354 transitions. [2021-07-13 19:30:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:30:18,070 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 [2021-07-13 19:30:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:18,070 INFO L225 Difference]: With dead ends: 164 [2021-07-13 19:30:18,070 INFO L226 Difference]: Without dead ends: 164 [2021-07-13 19:30:18,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:30:18,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-07-13 19:30:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 141. [2021-07-13 19:30:18,072 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) [2021-07-13 19:30:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 310 transitions. [2021-07-13 19:30:18,072 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 310 transitions. Word has length 18 [2021-07-13 19:30:18,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:18,072 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 310 transitions. [2021-07-13 19:30:18,072 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) [2021-07-13 19:30:18,072 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 310 transitions. [2021-07-13 19:30:18,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:18,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:18,072 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:18,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:18,282 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:18,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:18,283 INFO L82 PathProgramCache]: Analyzing trace with hash 263623520, now seen corresponding path program 158 times [2021-07-13 19:30:18,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:18,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158235099] [2021-07-13 19:30:18,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:18,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:18,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158235099] [2021-07-13 19:30:18,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158235099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:18,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995349284] [2021-07-13 19:30:18,436 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 [2021-07-13 19:30:18,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:30:18,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:18,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:18,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:18,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995349284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:18,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:18,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:18,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718181958] [2021-07-13 19:30:18,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:18,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:18,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:18,799 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) [2021-07-13 19:30:19,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:19,276 INFO L93 Difference]: Finished difference Result 205 states and 413 transitions. [2021-07-13 19:30:19,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:30:19,276 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 [2021-07-13 19:30:19,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:19,277 INFO L225 Difference]: With dead ends: 205 [2021-07-13 19:30:19,277 INFO L226 Difference]: Without dead ends: 186 [2021-07-13 19:30:19,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 669.0ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:30:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-13 19:30:19,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 137. [2021-07-13 19:30:19,278 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) [2021-07-13 19:30:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2021-07-13 19:30:19,278 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 18 [2021-07-13 19:30:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:19,279 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2021-07-13 19:30:19,279 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) [2021-07-13 19:30:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2021-07-13 19:30:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:19,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:19,279 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:19,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-07-13 19:30:19,479 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:19,480 INFO L82 PathProgramCache]: Analyzing trace with hash -274232058, now seen corresponding path program 159 times [2021-07-13 19:30:19,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:19,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401303090] [2021-07-13 19:30:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:19,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:19,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401303090] [2021-07-13 19:30:19,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401303090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:19,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461768270] [2021-07-13 19:30:19,648 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) [2021-07-13 19:30:19,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:30:19,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:19,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:20,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461768270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:20,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:20,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:20,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432277881] [2021-07-13 19:30:20,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:20,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:20,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:20,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:20,075 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) [2021-07-13 19:30:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:20,702 INFO L93 Difference]: Finished difference Result 209 states and 427 transitions. [2021-07-13 19:30:20,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:30:20,702 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 [2021-07-13 19:30:20,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:20,703 INFO L225 Difference]: With dead ends: 209 [2021-07-13 19:30:20,703 INFO L226 Difference]: Without dead ends: 190 [2021-07-13 19:30:20,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 795.8ms TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:30:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-13 19:30:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 135. [2021-07-13 19:30:20,704 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) [2021-07-13 19:30:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 295 transitions. [2021-07-13 19:30:20,705 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 295 transitions. Word has length 18 [2021-07-13 19:30:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:20,705 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 295 transitions. [2021-07-13 19:30:20,705 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) [2021-07-13 19:30:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 295 transitions. [2021-07-13 19:30:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:20,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:20,705 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:20,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1028,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:20,906 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:20,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1267484832, now seen corresponding path program 160 times [2021-07-13 19:30:20,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:20,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651273184] [2021-07-13 19:30:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:21,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:21,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651273184] [2021-07-13 19:30:21,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651273184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:21,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735564164] [2021-07-13 19:30:21,106 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 [2021-07-13 19:30:21,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:21,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:21,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:30:21,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:21,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735564164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:21,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:21,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:21,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285835007] [2021-07-13 19:30:21,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:21,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:21,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:21,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:21,462 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) [2021-07-13 19:30:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:21,894 INFO L93 Difference]: Finished difference Result 168 states and 346 transitions. [2021-07-13 19:30:21,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:30:21,894 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 [2021-07-13 19:30:21,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:21,895 INFO L225 Difference]: With dead ends: 168 [2021-07-13 19:30:21,895 INFO L226 Difference]: Without dead ends: 161 [2021-07-13 19:30:21,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 664.1ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:30:21,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-13 19:30:21,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2021-07-13 19:30:21,896 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) [2021-07-13 19:30:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 302 transitions. [2021-07-13 19:30:21,897 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 302 transitions. Word has length 18 [2021-07-13 19:30:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:21,897 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 302 transitions. [2021-07-13 19:30:21,897 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) [2021-07-13 19:30:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 302 transitions. [2021-07-13 19:30:21,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:21,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:21,897 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:22,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1040,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:22,098 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:22,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:22,098 INFO L82 PathProgramCache]: Analyzing trace with hash -309856898, now seen corresponding path program 161 times [2021-07-13 19:30:22,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:22,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224351025] [2021-07-13 19:30:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:22,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:22,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224351025] [2021-07-13 19:30:22,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224351025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:22,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762840071] [2021-07-13 19:30:22,304 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 [2021-07-13 19:30:22,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:30:22,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:22,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:22,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:22,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762840071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:22,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:22,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:22,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824710426] [2021-07-13 19:30:22,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:22,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:22,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:22,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:22,695 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) [2021-07-13 19:30:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:23,860 INFO L93 Difference]: Finished difference Result 214 states and 430 transitions. [2021-07-13 19:30:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:30:23,861 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 [2021-07-13 19:30:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:23,861 INFO L225 Difference]: With dead ends: 214 [2021-07-13 19:30:23,861 INFO L226 Difference]: Without dead ends: 190 [2021-07-13 19:30:23,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1357.6ms TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:30:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-13 19:30:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2021-07-13 19:30:23,863 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) [2021-07-13 19:30:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 316 transitions. [2021-07-13 19:30:23,863 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 316 transitions. Word has length 18 [2021-07-13 19:30:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:23,863 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 316 transitions. [2021-07-13 19:30:23,863 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) [2021-07-13 19:30:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 316 transitions. [2021-07-13 19:30:23,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:23,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:23,863 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:24,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:24,073 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:24,073 INFO L82 PathProgramCache]: Analyzing trace with hash 196489368, now seen corresponding path program 162 times [2021-07-13 19:30:24,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:24,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792219721] [2021-07-13 19:30:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:24,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:24,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792219721] [2021-07-13 19:30:24,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792219721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:24,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176663121] [2021-07-13 19:30:24,251 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 [2021-07-13 19:30:24,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:30:24,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:24,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:24,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:24,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176663121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:24,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:24,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:24,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153161514] [2021-07-13 19:30:24,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:24,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:24,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:24,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:24,602 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) [2021-07-13 19:30:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:25,300 INFO L93 Difference]: Finished difference Result 203 states and 416 transitions. [2021-07-13 19:30:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:30:25,300 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 [2021-07-13 19:30:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:25,300 INFO L225 Difference]: With dead ends: 203 [2021-07-13 19:30:25,300 INFO L226 Difference]: Without dead ends: 174 [2021-07-13 19:30:25,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 915.5ms TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:30:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-13 19:30:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 144. [2021-07-13 19:30:25,302 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) [2021-07-13 19:30:25,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 318 transitions. [2021-07-13 19:30:25,302 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 318 transitions. Word has length 18 [2021-07-13 19:30:25,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:25,302 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 318 transitions. [2021-07-13 19:30:25,302 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) [2021-07-13 19:30:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 318 transitions. [2021-07-13 19:30:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:25,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:25,303 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:25,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:25,503 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:25,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:25,504 INFO L82 PathProgramCache]: Analyzing trace with hash 993225120, now seen corresponding path program 163 times [2021-07-13 19:30:25,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:25,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064876345] [2021-07-13 19:30:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:25,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:25,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064876345] [2021-07-13 19:30:25,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064876345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:25,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854556061] [2021-07-13 19:30:25,650 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 [2021-07-13 19:30:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:25,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:30:25,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:25,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854556061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:25,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:25,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:25,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851736362] [2021-07-13 19:30:25,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:25,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:25,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:25,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:25,945 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) [2021-07-13 19:30:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:26,423 INFO L93 Difference]: Finished difference Result 212 states and 438 transitions. [2021-07-13 19:30:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:30:26,423 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 [2021-07-13 19:30:26,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:26,424 INFO L225 Difference]: With dead ends: 212 [2021-07-13 19:30:26,424 INFO L226 Difference]: Without dead ends: 193 [2021-07-13 19:30:26,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 604.9ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:30:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-13 19:30:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2021-07-13 19:30:26,425 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) [2021-07-13 19:30:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 318 transitions. [2021-07-13 19:30:26,426 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 318 transitions. Word has length 18 [2021-07-13 19:30:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:26,426 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 318 transitions. [2021-07-13 19:30:26,426 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) [2021-07-13 19:30:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 318 transitions. [2021-07-13 19:30:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:26,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:26,426 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:26,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1075 [2021-07-13 19:30:26,627 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:26,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:26,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1286645570, now seen corresponding path program 164 times [2021-07-13 19:30:26,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:26,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505907567] [2021-07-13 19:30:26,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:26,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:26,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505907567] [2021-07-13 19:30:26,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505907567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:26,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605760122] [2021-07-13 19:30:26,841 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 [2021-07-13 19:30:26,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:30:26,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:26,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:26,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:27,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605760122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:27,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:27,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:27,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396745062] [2021-07-13 19:30:27,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:27,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:27,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:27,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:27,208 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) [2021-07-13 19:30:27,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:27,719 INFO L93 Difference]: Finished difference Result 190 states and 394 transitions. [2021-07-13 19:30:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:30:27,720 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 [2021-07-13 19:30:27,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:27,720 INFO L225 Difference]: With dead ends: 190 [2021-07-13 19:30:27,720 INFO L226 Difference]: Without dead ends: 172 [2021-07-13 19:30:27,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 757.8ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:30:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-13 19:30:27,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 146. [2021-07-13 19:30:27,722 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) [2021-07-13 19:30:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 322 transitions. [2021-07-13 19:30:27,722 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 322 transitions. Word has length 18 [2021-07-13 19:30:27,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:27,722 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 322 transitions. [2021-07-13 19:30:27,722 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) [2021-07-13 19:30:27,722 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 322 transitions. [2021-07-13 19:30:27,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:27,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:27,723 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:27,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:27,923 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:27,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:27,923 INFO L82 PathProgramCache]: Analyzing trace with hash -489909818, now seen corresponding path program 165 times [2021-07-13 19:30:27,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:27,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641212820] [2021-07-13 19:30:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:28,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:28,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641212820] [2021-07-13 19:30:28,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641212820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:28,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557360882] [2021-07-13 19:30:28,065 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 [2021-07-13 19:30:28,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:30:28,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:28,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:28,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:28,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557360882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:28,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:28,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:28,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566394775] [2021-07-13 19:30:28,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:28,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:28,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:28,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:28,463 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) [2021-07-13 19:30:29,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:29,184 INFO L93 Difference]: Finished difference Result 217 states and 437 transitions. [2021-07-13 19:30:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:30:29,185 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 [2021-07-13 19:30:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:29,185 INFO L225 Difference]: With dead ends: 217 [2021-07-13 19:30:29,185 INFO L226 Difference]: Without dead ends: 188 [2021-07-13 19:30:29,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 945.5ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:30:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-13 19:30:29,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 149. [2021-07-13 19:30:29,187 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) [2021-07-13 19:30:29,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 330 transitions. [2021-07-13 19:30:29,187 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 330 transitions. Word has length 18 [2021-07-13 19:30:29,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:29,187 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 330 transitions. [2021-07-13 19:30:29,187 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) [2021-07-13 19:30:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 330 transitions. [2021-07-13 19:30:29,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:29,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:29,187 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:29,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:29,391 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:29,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:29,391 INFO L82 PathProgramCache]: Analyzing trace with hash 16436448, now seen corresponding path program 166 times [2021-07-13 19:30:29,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:29,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517562697] [2021-07-13 19:30:29,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:29,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:29,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517562697] [2021-07-13 19:30:29,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517562697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:29,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094863486] [2021-07-13 19:30:29,570 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 [2021-07-13 19:30:29,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:29,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:29,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:29,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:30,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094863486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:30,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:30,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:30,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767880218] [2021-07-13 19:30:30,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:30,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:30,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:30,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:30,013 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) [2021-07-13 19:30:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:30,482 INFO L93 Difference]: Finished difference Result 219 states and 454 transitions. [2021-07-13 19:30:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:30:30,482 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 [2021-07-13 19:30:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:30,483 INFO L225 Difference]: With dead ends: 219 [2021-07-13 19:30:30,483 INFO L226 Difference]: Without dead ends: 200 [2021-07-13 19:30:30,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 728.8ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:30:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-13 19:30:30,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2021-07-13 19:30:30,484 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) [2021-07-13 19:30:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 333 transitions. [2021-07-13 19:30:30,485 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 333 transitions. Word has length 18 [2021-07-13 19:30:30,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:30,485 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 333 transitions. [2021-07-13 19:30:30,485 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) [2021-07-13 19:30:30,485 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 333 transitions. [2021-07-13 19:30:30,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:30,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:30,485 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:30,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1108 [2021-07-13 19:30:30,686 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:30,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:30,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1660498388, now seen corresponding path program 167 times [2021-07-13 19:30:30,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:30,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854005925] [2021-07-13 19:30:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:30,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:30,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854005925] [2021-07-13 19:30:30,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854005925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:30,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420385853] [2021-07-13 19:30:30,843 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 [2021-07-13 19:30:30,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:30:30,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:30,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:31,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420385853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:31,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:31,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:30:31,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817918713] [2021-07-13 19:30:31,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:30:31,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:31,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:30:31,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:30:31,221 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) [2021-07-13 19:30:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:31,708 INFO L93 Difference]: Finished difference Result 170 states and 363 transitions. [2021-07-13 19:30:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:30:31,709 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 [2021-07-13 19:30:31,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:31,709 INFO L225 Difference]: With dead ends: 170 [2021-07-13 19:30:31,709 INFO L226 Difference]: Without dead ends: 155 [2021-07-13 19:30:31,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 760.2ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:30:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-13 19:30:31,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2021-07-13 19:30:31,711 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) [2021-07-13 19:30:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 337 transitions. [2021-07-13 19:30:31,711 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 337 transitions. Word has length 18 [2021-07-13 19:30:31,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:31,711 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 337 transitions. [2021-07-13 19:30:31,711 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) [2021-07-13 19:30:31,711 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 337 transitions. [2021-07-13 19:30:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:31,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:31,711 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:31,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1120,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:31,921 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:31,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:31,921 INFO L82 PathProgramCache]: Analyzing trace with hash 7545014, now seen corresponding path program 168 times [2021-07-13 19:30:31,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:31,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717946107] [2021-07-13 19:30:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:32,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:32,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717946107] [2021-07-13 19:30:32,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717946107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:32,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289521339] [2021-07-13 19:30:32,162 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 [2021-07-13 19:30:32,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:30:32,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:32,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:32,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:32,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289521339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:32,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:32,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:30:32,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756940849] [2021-07-13 19:30:32,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:30:32,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:32,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:30:32,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:30:32,623 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) [2021-07-13 19:30:33,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:33,116 INFO L93 Difference]: Finished difference Result 169 states and 362 transitions. [2021-07-13 19:30:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:30:33,116 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 [2021-07-13 19:30:33,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:33,117 INFO L225 Difference]: With dead ends: 169 [2021-07-13 19:30:33,117 INFO L226 Difference]: Without dead ends: 156 [2021-07-13 19:30:33,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 883.8ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:30:33,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-13 19:30:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2021-07-13 19:30:33,118 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) [2021-07-13 19:30:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 339 transitions. [2021-07-13 19:30:33,119 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 339 transitions. Word has length 18 [2021-07-13 19:30:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:33,119 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 339 transitions. [2021-07-13 19:30:33,119 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) [2021-07-13 19:30:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 339 transitions. [2021-07-13 19:30:33,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:33,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:33,119 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:33,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:33,320 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:33,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1569796716, now seen corresponding path program 169 times [2021-07-13 19:30:33,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:33,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196771531] [2021-07-13 19:30:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:33,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:33,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196771531] [2021-07-13 19:30:33,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196771531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:33,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47241644] [2021-07-13 19:30:33,518 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 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 [2021-07-13 19:30:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:33,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:30:33,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:33,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47241644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:33,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:33,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:30:33,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749497361] [2021-07-13 19:30:33,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:30:33,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:33,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:30:33,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:30:33,930 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) [2021-07-13 19:30:34,851 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-07-13 19:30:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:35,319 INFO L93 Difference]: Finished difference Result 226 states and 453 transitions. [2021-07-13 19:30:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:30:35,319 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 [2021-07-13 19:30:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:35,320 INFO L225 Difference]: With dead ends: 226 [2021-07-13 19:30:35,320 INFO L226 Difference]: Without dead ends: 201 [2021-07-13 19:30:35,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1646.1ms TimeCoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:30:35,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-07-13 19:30:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 152. [2021-07-13 19:30:35,322 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) [2021-07-13 19:30:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 337 transitions. [2021-07-13 19:30:35,322 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 337 transitions. Word has length 18 [2021-07-13 19:30:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:35,322 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 337 transitions. [2021-07-13 19:30:35,322 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) [2021-07-13 19:30:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 337 transitions. [2021-07-13 19:30:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:35,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:35,322 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:35,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:35,523 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:35,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:35,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1475589924, now seen corresponding path program 170 times [2021-07-13 19:30:35,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:35,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792641374] [2021-07-13 19:30:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:35,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:35,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792641374] [2021-07-13 19:30:35,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792641374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:35,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407216374] [2021-07-13 19:30:35,724 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 [2021-07-13 19:30:35,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:30:35,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:35,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:35,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:36,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407216374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:36,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:36,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:36,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124549969] [2021-07-13 19:30:36,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:36,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:36,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:36,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:36,087 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) [2021-07-13 19:30:36,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:36,383 INFO L93 Difference]: Finished difference Result 170 states and 364 transitions. [2021-07-13 19:30:36,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:30:36,383 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 [2021-07-13 19:30:36,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:36,383 INFO L225 Difference]: With dead ends: 170 [2021-07-13 19:30:36,383 INFO L226 Difference]: Without dead ends: 157 [2021-07-13 19:30:36,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 605.1ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:30:36,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-13 19:30:36,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2021-07-13 19:30:36,385 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) [2021-07-13 19:30:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 341 transitions. [2021-07-13 19:30:36,385 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 341 transitions. Word has length 18 [2021-07-13 19:30:36,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:36,385 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 341 transitions. [2021-07-13 19:30:36,385 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) [2021-07-13 19:30:36,385 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 341 transitions. [2021-07-13 19:30:36,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:36,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:36,386 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:36,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1152,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:36,586 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:36,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:36,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1242035642, now seen corresponding path program 171 times [2021-07-13 19:30:36,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:36,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749291521] [2021-07-13 19:30:36,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:36,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:36,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749291521] [2021-07-13 19:30:36,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749291521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:36,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005242565] [2021-07-13 19:30:36,804 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 [2021-07-13 19:30:36,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:30:36,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:36,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:30:36,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:37,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005242565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:37,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:37,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:37,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540741916] [2021-07-13 19:30:37,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:37,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:37,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:37,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:37,180 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) [2021-07-13 19:30:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:38,063 INFO L93 Difference]: Finished difference Result 202 states and 418 transitions. [2021-07-13 19:30:38,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:30:38,064 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 [2021-07-13 19:30:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:38,064 INFO L225 Difference]: With dead ends: 202 [2021-07-13 19:30:38,064 INFO L226 Difference]: Without dead ends: 181 [2021-07-13 19:30:38,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1087.0ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:30:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-07-13 19:30:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2021-07-13 19:30:38,066 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) [2021-07-13 19:30:38,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 344 transitions. [2021-07-13 19:30:38,066 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 344 transitions. Word has length 18 [2021-07-13 19:30:38,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:38,066 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 344 transitions. [2021-07-13 19:30:38,066 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) [2021-07-13 19:30:38,066 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 344 transitions. [2021-07-13 19:30:38,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:38,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:38,066 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:38,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:38,267 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:38,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:38,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1955577145, now seen corresponding path program 172 times [2021-07-13 19:30:38,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:38,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141960871] [2021-07-13 19:30:38,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:30:38,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:38,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141960871] [2021-07-13 19:30:38,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141960871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:38,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666032430] [2021-07-13 19:30:38,336 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 [2021-07-13 19:30:38,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:38,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:38,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:30:38,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:30:38,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666032430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:38,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:38,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:30:38,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793248236] [2021-07-13 19:30:38,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:30:38,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:38,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:30:38,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:30:38,477 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) [2021-07-13 19:30:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:38,765 INFO L93 Difference]: Finished difference Result 186 states and 405 transitions. [2021-07-13 19:30:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:30:38,765 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 [2021-07-13 19:30:38,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:38,765 INFO L225 Difference]: With dead ends: 186 [2021-07-13 19:30:38,765 INFO L226 Difference]: Without dead ends: 186 [2021-07-13 19:30:38,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:30:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-13 19:30:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2021-07-13 19:30:38,767 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) [2021-07-13 19:30:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 344 transitions. [2021-07-13 19:30:38,767 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 344 transitions. Word has length 18 [2021-07-13 19:30:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:38,767 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 344 transitions. [2021-07-13 19:30:38,768 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) [2021-07-13 19:30:38,768 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 344 transitions. [2021-07-13 19:30:38,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:38,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:38,768 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:38,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-07-13 19:30:38,969 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:38,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:38,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1748381908, now seen corresponding path program 173 times [2021-07-13 19:30:38,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:38,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129710549] [2021-07-13 19:30:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:39,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:39,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129710549] [2021-07-13 19:30:39,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129710549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:39,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050374395] [2021-07-13 19:30:39,121 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 [2021-07-13 19:30:39,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:30:39,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:39,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:39,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:39,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050374395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:39,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:39,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:39,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486019335] [2021-07-13 19:30:39,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:39,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:39,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:39,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:39,479 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) [2021-07-13 19:30:40,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:40,115 INFO L93 Difference]: Finished difference Result 212 states and 446 transitions. [2021-07-13 19:30:40,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:30:40,115 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 [2021-07-13 19:30:40,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:40,115 INFO L225 Difference]: With dead ends: 212 [2021-07-13 19:30:40,115 INFO L226 Difference]: Without dead ends: 192 [2021-07-13 19:30:40,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 768.2ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:30:40,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-07-13 19:30:40,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 157. [2021-07-13 19:30:40,117 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) [2021-07-13 19:30:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 348 transitions. [2021-07-13 19:30:40,117 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 348 transitions. Word has length 18 [2021-07-13 19:30:40,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:40,117 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 348 transitions. [2021-07-13 19:30:40,117 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) [2021-07-13 19:30:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 348 transitions. [2021-07-13 19:30:40,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:40,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:40,118 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:40,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1181,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:40,335 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:40,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1211994058, now seen corresponding path program 174 times [2021-07-13 19:30:40,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:40,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206226380] [2021-07-13 19:30:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:40,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:40,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206226380] [2021-07-13 19:30:40,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206226380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:40,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840325442] [2021-07-13 19:30:40,510 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 [2021-07-13 19:30:40,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:30:40,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:40,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:30:40,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:40,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840325442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:40,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:40,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:40,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850030275] [2021-07-13 19:30:40,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:40,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:40,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:40,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:40,814 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) [2021-07-13 19:30:41,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:41,481 INFO L93 Difference]: Finished difference Result 221 states and 456 transitions. [2021-07-13 19:30:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:30:41,481 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 [2021-07-13 19:30:41,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:41,482 INFO L225 Difference]: With dead ends: 221 [2021-07-13 19:30:41,482 INFO L226 Difference]: Without dead ends: 200 [2021-07-13 19:30:41,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 833.4ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:30:41,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-13 19:30:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 159. [2021-07-13 19:30:41,483 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) [2021-07-13 19:30:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 353 transitions. [2021-07-13 19:30:41,484 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 353 transitions. Word has length 18 [2021-07-13 19:30:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:41,484 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 353 transitions. [2021-07-13 19:30:41,484 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) [2021-07-13 19:30:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 353 transitions. [2021-07-13 19:30:41,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:41,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:41,484 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:41,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:41,685 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:41,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:41,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1749849636, now seen corresponding path program 175 times [2021-07-13 19:30:41,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:41,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744385192] [2021-07-13 19:30:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:41,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:41,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744385192] [2021-07-13 19:30:41,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744385192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:41,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628189012] [2021-07-13 19:30:41,835 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 [2021-07-13 19:30:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:41,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:41,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:42,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628189012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:42,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:42,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:42,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558607874] [2021-07-13 19:30:42,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:42,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:42,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:42,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:42,230 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) [2021-07-13 19:30:42,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:42,635 INFO L93 Difference]: Finished difference Result 222 states and 464 transitions. [2021-07-13 19:30:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:30:42,635 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 [2021-07-13 19:30:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:42,636 INFO L225 Difference]: With dead ends: 222 [2021-07-13 19:30:42,636 INFO L226 Difference]: Without dead ends: 203 [2021-07-13 19:30:42,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 617.6ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:30:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-13 19:30:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 159. [2021-07-13 19:30:42,637 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) [2021-07-13 19:30:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 353 transitions. [2021-07-13 19:30:42,638 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 353 transitions. Word has length 18 [2021-07-13 19:30:42,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:42,638 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 353 transitions. [2021-07-13 19:30:42,638 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) [2021-07-13 19:30:42,638 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 353 transitions. [2021-07-13 19:30:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:42,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:42,638 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:42,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1204 [2021-07-13 19:30:42,839 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:42,839 INFO L82 PathProgramCache]: Analyzing trace with hash -208132746, now seen corresponding path program 176 times [2021-07-13 19:30:42,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:42,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431427022] [2021-07-13 19:30:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:43,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:43,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431427022] [2021-07-13 19:30:43,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431427022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:43,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057210477] [2021-07-13 19:30:43,048 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 [2021-07-13 19:30:43,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:30:43,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:43,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:43,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:43,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057210477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:43,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:43,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:43,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771141388] [2021-07-13 19:30:43,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:43,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:43,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:43,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:43,407 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) [2021-07-13 19:30:43,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:43,695 INFO L93 Difference]: Finished difference Result 177 states and 380 transitions. [2021-07-13 19:30:43,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:30:43,695 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 [2021-07-13 19:30:43,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:43,696 INFO L225 Difference]: With dead ends: 177 [2021-07-13 19:30:43,696 INFO L226 Difference]: Without dead ends: 164 [2021-07-13 19:30:43,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 596.3ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:30:43,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-07-13 19:30:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2021-07-13 19:30:43,697 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) [2021-07-13 19:30:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 357 transitions. [2021-07-13 19:30:43,698 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 357 transitions. Word has length 18 [2021-07-13 19:30:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:43,698 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 357 transitions. [2021-07-13 19:30:43,698 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) [2021-07-13 19:30:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 357 transitions. [2021-07-13 19:30:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:43,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:43,698 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:43,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1216,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:43,899 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:43,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:43,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1785474476, now seen corresponding path program 177 times [2021-07-13 19:30:43,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:43,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901263238] [2021-07-13 19:30:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:44,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:44,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901263238] [2021-07-13 19:30:44,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901263238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:44,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260840507] [2021-07-13 19:30:44,116 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 [2021-07-13 19:30:44,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:30:44,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:44,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:30:44,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:44,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260840507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:44,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:44,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:44,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433004144] [2021-07-13 19:30:44,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:44,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:44,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:44,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:44,514 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) [2021-07-13 19:30:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:45,202 INFO L93 Difference]: Finished difference Result 216 states and 440 transitions. [2021-07-13 19:30:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:30:45,202 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 [2021-07-13 19:30:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:45,203 INFO L225 Difference]: With dead ends: 216 [2021-07-13 19:30:45,203 INFO L226 Difference]: Without dead ends: 184 [2021-07-13 19:30:45,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 949.4ms TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:30:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-13 19:30:45,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 160. [2021-07-13 19:30:45,205 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) [2021-07-13 19:30:45,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 355 transitions. [2021-07-13 19:30:45,205 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 355 transitions. Word has length 18 [2021-07-13 19:30:45,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:45,205 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 355 transitions. [2021-07-13 19:30:45,205 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) [2021-07-13 19:30:45,205 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 355 transitions. [2021-07-13 19:30:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:45,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:45,205 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:45,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1227 [2021-07-13 19:30:45,406 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:45,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1279128210, now seen corresponding path program 178 times [2021-07-13 19:30:45,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:45,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103016033] [2021-07-13 19:30:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:45,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:45,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103016033] [2021-07-13 19:30:45,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103016033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:45,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903549716] [2021-07-13 19:30:45,625 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 [2021-07-13 19:30:45,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:45,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:45,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:45,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:45,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903549716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:45,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:45,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:45,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419609154] [2021-07-13 19:30:45,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:45,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:45,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:45,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:45,972 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) [2021-07-13 19:30:46,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:46,829 INFO L93 Difference]: Finished difference Result 228 states and 475 transitions. [2021-07-13 19:30:46,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:30:46,830 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 [2021-07-13 19:30:46,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:46,830 INFO L225 Difference]: With dead ends: 228 [2021-07-13 19:30:46,830 INFO L226 Difference]: Without dead ends: 210 [2021-07-13 19:30:46,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1148.2ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:30:46,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-13 19:30:46,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2021-07-13 19:30:46,832 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) [2021-07-13 19:30:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 368 transitions. [2021-07-13 19:30:46,832 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 368 transitions. Word has length 18 [2021-07-13 19:30:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:46,833 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 368 transitions. [2021-07-13 19:30:46,833 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) [2021-07-13 19:30:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 368 transitions. [2021-07-13 19:30:46,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:46,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:46,833 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:47,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1238,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:47,050 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:47,050 INFO L82 PathProgramCache]: Analyzing trace with hash 55463120, now seen corresponding path program 179 times [2021-07-13 19:30:47,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:47,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789334105] [2021-07-13 19:30:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:47,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:47,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789334105] [2021-07-13 19:30:47,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789334105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:47,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823962614] [2021-07-13 19:30:47,192 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 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 [2021-07-13 19:30:47,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:30:47,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:47,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:47,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:47,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823962614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:47,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:47,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:47,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295329783] [2021-07-13 19:30:47,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:47,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:47,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:47,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:47,532 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) [2021-07-13 19:30:48,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:48,215 INFO L93 Difference]: Finished difference Result 227 states and 468 transitions. [2021-07-13 19:30:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:30:48,215 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 [2021-07-13 19:30:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:48,215 INFO L225 Difference]: With dead ends: 227 [2021-07-13 19:30:48,215 INFO L226 Difference]: Without dead ends: 208 [2021-07-13 19:30:48,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 847.0ms TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:30:48,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-13 19:30:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 161. [2021-07-13 19:30:48,217 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) [2021-07-13 19:30:48,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 357 transitions. [2021-07-13 19:30:48,218 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 357 transitions. Word has length 18 [2021-07-13 19:30:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:48,218 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 357 transitions. [2021-07-13 19:30:48,218 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) [2021-07-13 19:30:48,218 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 357 transitions. [2021-07-13 19:30:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:48,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:48,218 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:48,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1249,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:48,433 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:48,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:48,433 INFO L82 PathProgramCache]: Analyzing trace with hash -482392458, now seen corresponding path program 180 times [2021-07-13 19:30:48,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:48,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120729451] [2021-07-13 19:30:48,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:48,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:48,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120729451] [2021-07-13 19:30:48,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120729451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:48,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32045768] [2021-07-13 19:30:48,599 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 [2021-07-13 19:30:48,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:30:48,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:48,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:48,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:48,878 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-13 19:30:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:49,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32045768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:49,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:49,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:49,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767249243] [2021-07-13 19:30:49,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:49,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:49,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:49,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:49,010 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) [2021-07-13 19:30:49,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:49,464 INFO L93 Difference]: Finished difference Result 224 states and 468 transitions. [2021-07-13 19:30:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:30:49,464 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 [2021-07-13 19:30:49,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:49,464 INFO L225 Difference]: With dead ends: 224 [2021-07-13 19:30:49,464 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 19:30:49,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:30:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 19:30:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2021-07-13 19:30:49,466 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) [2021-07-13 19:30:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 355 transitions. [2021-07-13 19:30:49,466 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 355 transitions. Word has length 18 [2021-07-13 19:30:49,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:49,467 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 355 transitions. [2021-07-13 19:30:49,467 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) [2021-07-13 19:30:49,467 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 355 transitions. [2021-07-13 19:30:49,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:49,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:49,467 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:49,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1262,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:49,667 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:49,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1532704148, now seen corresponding path program 181 times [2021-07-13 19:30:49,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:49,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124802034] [2021-07-13 19:30:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:49,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:49,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124802034] [2021-07-13 19:30:49,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124802034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:49,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547606117] [2021-07-13 19:30:49,882 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 [2021-07-13 19:30:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:49,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:49,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:50,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547606117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:50,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:50,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:50,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338896548] [2021-07-13 19:30:50,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:50,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:50,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:50,231 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) [2021-07-13 19:30:50,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:50,962 INFO L93 Difference]: Finished difference Result 218 states and 444 transitions. [2021-07-13 19:30:50,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:30:50,962 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 [2021-07-13 19:30:50,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:50,963 INFO L225 Difference]: With dead ends: 218 [2021-07-13 19:30:50,963 INFO L226 Difference]: Without dead ends: 186 [2021-07-13 19:30:50,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 925.8ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:30:50,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-13 19:30:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-07-13 19:30:50,965 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) [2021-07-13 19:30:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 358 transitions. [2021-07-13 19:30:50,965 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 358 transitions. Word has length 18 [2021-07-13 19:30:50,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:50,965 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 358 transitions. [2021-07-13 19:30:50,965 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) [2021-07-13 19:30:50,965 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 358 transitions. [2021-07-13 19:30:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:50,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:50,965 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:51,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:51,166 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:51,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:51,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2078756465, now seen corresponding path program 182 times [2021-07-13 19:30:51,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:51,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998433644] [2021-07-13 19:30:51,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:30:51,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:51,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998433644] [2021-07-13 19:30:51,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998433644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:51,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926084907] [2021-07-13 19:30:51,250 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 [2021-07-13 19:30:51,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:30:51,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:51,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:30:51,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:30:51,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926084907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:51,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:51,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:30:51,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199763625] [2021-07-13 19:30:51,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:30:51,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:30:51,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:30:51,454 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) [2021-07-13 19:30:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:51,583 INFO L93 Difference]: Finished difference Result 170 states and 372 transitions. [2021-07-13 19:30:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:30:51,584 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 [2021-07-13 19:30:51,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:51,584 INFO L225 Difference]: With dead ends: 170 [2021-07-13 19:30:51,584 INFO L226 Difference]: Without dead ends: 170 [2021-07-13 19:30:51,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:30:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-07-13 19:30:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2021-07-13 19:30:51,586 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) [2021-07-13 19:30:51,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-07-13 19:30:51,586 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-07-13 19:30:51,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:51,586 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-07-13 19:30:51,586 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) [2021-07-13 19:30:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-07-13 19:30:51,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:51,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:51,586 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:51,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:51,787 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:51,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:51,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1965527396, now seen corresponding path program 183 times [2021-07-13 19:30:51,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:51,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204715274] [2021-07-13 19:30:51,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:51,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:51,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204715274] [2021-07-13 19:30:51,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204715274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:51,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769218043] [2021-07-13 19:30:51,931 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 [2021-07-13 19:30:51,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:30:51,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:51,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:51,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:52,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769218043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:52,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:52,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:52,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748561664] [2021-07-13 19:30:52,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:52,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:52,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:52,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:52,331 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) [2021-07-13 19:30:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:52,827 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-07-13 19:30:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:30:52,828 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 [2021-07-13 19:30:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:52,828 INFO L225 Difference]: With dead ends: 222 [2021-07-13 19:30:52,828 INFO L226 Difference]: Without dead ends: 203 [2021-07-13 19:30:52,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 715.7ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:30:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-13 19:30:52,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 159. [2021-07-13 19:30:52,830 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) [2021-07-13 19:30:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-07-13 19:30:52,831 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-07-13 19:30:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:52,831 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-07-13 19:30:52,831 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) [2021-07-13 19:30:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-07-13 19:30:52,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:52,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:52,831 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:53,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:53,039 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:53,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:53,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1459181130, now seen corresponding path program 184 times [2021-07-13 19:30:53,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:53,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117858312] [2021-07-13 19:30:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:53,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:53,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117858312] [2021-07-13 19:30:53,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117858312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:53,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496823895] [2021-07-13 19:30:53,175 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 [2021-07-13 19:30:53,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:30:53,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:53,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:30:53,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:53,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496823895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:53,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:53,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:53,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30033221] [2021-07-13 19:30:53,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:53,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:53,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:53,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:53,591 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) [2021-07-13 19:30:54,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:54,095 INFO L93 Difference]: Finished difference Result 226 states and 470 transitions. [2021-07-13 19:30:54,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:30:54,095 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 [2021-07-13 19:30:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:54,095 INFO L225 Difference]: With dead ends: 226 [2021-07-13 19:30:54,095 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 19:30:54,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 711.4ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:30:54,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 19:30:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 159. [2021-07-13 19:30:54,097 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) [2021-07-13 19:30:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-07-13 19:30:54,098 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-07-13 19:30:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:54,098 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-07-13 19:30:54,098 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) [2021-07-13 19:30:54,098 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-07-13 19:30:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:54,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:54,098 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:54,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1303 [2021-07-13 19:30:54,316 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:54,316 INFO L82 PathProgramCache]: Analyzing trace with hash 428334108, now seen corresponding path program 185 times [2021-07-13 19:30:54,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:54,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706734066] [2021-07-13 19:30:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:54,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:54,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706734066] [2021-07-13 19:30:54,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706734066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:54,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346234378] [2021-07-13 19:30:54,470 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 [2021-07-13 19:30:54,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:30:54,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:54,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:30:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:54,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346234378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:54,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:54,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:54,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567056487] [2021-07-13 19:30:54,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:54,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:54,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:54,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:54,865 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) [2021-07-13 19:30:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:55,706 INFO L93 Difference]: Finished difference Result 207 states and 433 transitions. [2021-07-13 19:30:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:30:55,706 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 [2021-07-13 19:30:55,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:55,707 INFO L225 Difference]: With dead ends: 207 [2021-07-13 19:30:55,707 INFO L226 Difference]: Without dead ends: 200 [2021-07-13 19:30:55,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 993.7ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:30:55,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-13 19:30:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 161. [2021-07-13 19:30:55,715 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) [2021-07-13 19:30:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 356 transitions. [2021-07-13 19:30:55,715 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 356 transitions. Word has length 18 [2021-07-13 19:30:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:55,715 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 356 transitions. [2021-07-13 19:30:55,715 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) [2021-07-13 19:30:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 356 transitions. [2021-07-13 19:30:55,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:55,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:55,716 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:55,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1314,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:55,921 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:55,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:55,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1149007622, now seen corresponding path program 186 times [2021-07-13 19:30:55,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:55,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367904272] [2021-07-13 19:30:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:56,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:56,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367904272] [2021-07-13 19:30:56,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367904272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:56,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757042107] [2021-07-13 19:30:56,100 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 [2021-07-13 19:30:56,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:30:56,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:30:56,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:56,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:56,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757042107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:56,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:56,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:56,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497617147] [2021-07-13 19:30:56,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:56,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:56,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:56,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:56,473 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) [2021-07-13 19:30:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:58,014 INFO L93 Difference]: Finished difference Result 266 states and 523 transitions. [2021-07-13 19:30:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:30:58,015 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 [2021-07-13 19:30:58,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:58,015 INFO L225 Difference]: With dead ends: 266 [2021-07-13 19:30:58,015 INFO L226 Difference]: Without dead ends: 228 [2021-07-13 19:30:58,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1702.2ms TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:30:58,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-13 19:30:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 164. [2021-07-13 19:30:58,017 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) [2021-07-13 19:30:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 365 transitions. [2021-07-13 19:30:58,018 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 365 transitions. Word has length 18 [2021-07-13 19:30:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:58,018 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 365 transitions. [2021-07-13 19:30:58,018 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) [2021-07-13 19:30:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 365 transitions. [2021-07-13 19:30:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:58,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:58,018 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:58,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:58,219 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:58,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:58,219 INFO L82 PathProgramCache]: Analyzing trace with hash -642661356, now seen corresponding path program 187 times [2021-07-13 19:30:58,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:58,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65120790] [2021-07-13 19:30:58,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:58,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:58,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65120790] [2021-07-13 19:30:58,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65120790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:58,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588657399] [2021-07-13 19:30:58,427 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 [2021-07-13 19:30:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:58,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:30:58,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:58,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588657399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:58,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:58,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:30:58,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333816557] [2021-07-13 19:30:58,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:30:58,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:58,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:30:58,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:30:58,763 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) [2021-07-13 19:30:59,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:59,614 INFO L93 Difference]: Finished difference Result 228 states and 469 transitions. [2021-07-13 19:30:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:30:59,615 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 [2021-07-13 19:30:59,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:59,615 INFO L225 Difference]: With dead ends: 228 [2021-07-13 19:30:59,615 INFO L226 Difference]: Without dead ends: 203 [2021-07-13 19:30:59,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1023.1ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:30:59,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-13 19:30:59,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2021-07-13 19:30:59,617 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) [2021-07-13 19:30:59,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 367 transitions. [2021-07-13 19:30:59,617 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 367 transitions. Word has length 18 [2021-07-13 19:30:59,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:59,617 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 367 transitions. [2021-07-13 19:30:59,617 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) [2021-07-13 19:30:59,617 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 367 transitions. [2021-07-13 19:30:59,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:30:59,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:59,618 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:59,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1338 [2021-07-13 19:30:59,818 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:59,819 INFO L82 PathProgramCache]: Analyzing trace with hash 154074396, now seen corresponding path program 188 times [2021-07-13 19:30:59,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:59,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504271066] [2021-07-13 19:30:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:59,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:59,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504271066] [2021-07-13 19:30:59,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504271066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:59,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549478948] [2021-07-13 19:30:59,975 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 [2021-07-13 19:31:00,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:00,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:00,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:00,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:00,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549478948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:00,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:00,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:00,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579750686] [2021-07-13 19:31:00,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:00,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:00,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:00,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:00,367 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) [2021-07-13 19:31:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:00,848 INFO L93 Difference]: Finished difference Result 233 states and 476 transitions. [2021-07-13 19:31:00,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:31:00,848 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 [2021-07-13 19:31:00,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:00,848 INFO L225 Difference]: With dead ends: 233 [2021-07-13 19:31:00,848 INFO L226 Difference]: Without dead ends: 211 [2021-07-13 19:31:00,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 668.2ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:31:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-13 19:31:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 166. [2021-07-13 19:31:00,850 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) [2021-07-13 19:31:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 369 transitions. [2021-07-13 19:31:00,850 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 369 transitions. Word has length 18 [2021-07-13 19:31:00,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:00,850 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 369 transitions. [2021-07-13 19:31:00,851 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) [2021-07-13 19:31:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 369 transitions. [2021-07-13 19:31:00,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:00,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:00,851 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:01,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1351,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:01,052 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:01,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:01,052 INFO L82 PathProgramCache]: Analyzing trace with hash -2125796294, now seen corresponding path program 189 times [2021-07-13 19:31:01,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:01,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082686938] [2021-07-13 19:31:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:01,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:01,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082686938] [2021-07-13 19:31:01,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082686938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:01,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014687346] [2021-07-13 19:31:01,242 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 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 [2021-07-13 19:31:01,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:31:01,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:01,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:31:01,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:01,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014687346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:01,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:01,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:01,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771294709] [2021-07-13 19:31:01,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:01,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:01,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:01,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:01,591 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) [2021-07-13 19:31:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:02,236 INFO L93 Difference]: Finished difference Result 223 states and 456 transitions. [2021-07-13 19:31:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:02,237 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 [2021-07-13 19:31:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:02,237 INFO L225 Difference]: With dead ends: 223 [2021-07-13 19:31:02,237 INFO L226 Difference]: Without dead ends: 191 [2021-07-13 19:31:02,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 867.6ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:31:02,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-13 19:31:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 168. [2021-07-13 19:31:02,239 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) [2021-07-13 19:31:02,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 373 transitions. [2021-07-13 19:31:02,239 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 373 transitions. Word has length 18 [2021-07-13 19:31:02,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:02,239 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 373 transitions. [2021-07-13 19:31:02,239 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) [2021-07-13 19:31:02,239 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 373 transitions. [2021-07-13 19:31:02,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:02,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:02,239 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:02,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-07-13 19:31:02,440 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:02,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:02,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1329060542, now seen corresponding path program 190 times [2021-07-13 19:31:02,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:02,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545992705] [2021-07-13 19:31:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:02,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:02,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545992705] [2021-07-13 19:31:02,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545992705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:02,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674110118] [2021-07-13 19:31:02,596 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 [2021-07-13 19:31:02,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:02,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:02,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:02,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:02,865 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-13 19:31:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:02,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674110118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:02,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:02,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:02,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120040048] [2021-07-13 19:31:02,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:02,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:02,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:02,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:02,995 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) [2021-07-13 19:31:03,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:03,575 INFO L93 Difference]: Finished difference Result 235 states and 480 transitions. [2021-07-13 19:31:03,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:03,575 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 [2021-07-13 19:31:03,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:03,576 INFO L225 Difference]: With dead ends: 235 [2021-07-13 19:31:03,576 INFO L226 Difference]: Without dead ends: 213 [2021-07-13 19:31:03,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 800.3ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:31:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-13 19:31:03,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-07-13 19:31:03,577 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) [2021-07-13 19:31:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 371 transitions. [2021-07-13 19:31:03,578 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 371 transitions. Word has length 18 [2021-07-13 19:31:03,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:03,578 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 371 transitions. [2021-07-13 19:31:03,578 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) [2021-07-13 19:31:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 371 transitions. [2021-07-13 19:31:03,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:03,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:03,578 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:03,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-07-13 19:31:03,779 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:03,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:03,779 INFO L82 PathProgramCache]: Analyzing trace with hash -822714276, now seen corresponding path program 191 times [2021-07-13 19:31:03,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:03,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399315711] [2021-07-13 19:31:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:03,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:03,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399315711] [2021-07-13 19:31:03,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399315711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:03,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143812204] [2021-07-13 19:31:03,926 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 [2021-07-13 19:31:03,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:31:03,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:03,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:03,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:04,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143812204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:04,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:04,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:04,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662959902] [2021-07-13 19:31:04,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:04,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:04,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:04,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:04,351 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) [2021-07-13 19:31:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:05,023 INFO L93 Difference]: Finished difference Result 239 states and 488 transitions. [2021-07-13 19:31:05,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:31:05,023 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 [2021-07-13 19:31:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:05,024 INFO L225 Difference]: With dead ends: 239 [2021-07-13 19:31:05,024 INFO L226 Difference]: Without dead ends: 214 [2021-07-13 19:31:05,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 873.2ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:31:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-13 19:31:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 168. [2021-07-13 19:31:05,026 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) [2021-07-13 19:31:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 373 transitions. [2021-07-13 19:31:05,026 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 373 transitions. Word has length 18 [2021-07-13 19:31:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:05,026 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 373 transitions. [2021-07-13 19:31:05,027 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) [2021-07-13 19:31:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 373 transitions. [2021-07-13 19:31:05,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:05,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:05,027 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:05,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-07-13 19:31:05,244 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:05,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:05,245 INFO L82 PathProgramCache]: Analyzing trace with hash -858339116, now seen corresponding path program 192 times [2021-07-13 19:31:05,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:05,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100762389] [2021-07-13 19:31:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:05,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:05,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100762389] [2021-07-13 19:31:05,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100762389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:05,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245590974] [2021-07-13 19:31:05,469 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 [2021-07-13 19:31:05,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:31:05,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:05,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:31:05,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:05,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245590974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:05,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:05,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:05,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496541122] [2021-07-13 19:31:05,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:05,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:05,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:05,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:05,812 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) [2021-07-13 19:31:06,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:06,616 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-07-13 19:31:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:31:06,617 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 [2021-07-13 19:31:06,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:06,617 INFO L225 Difference]: With dead ends: 222 [2021-07-13 19:31:06,617 INFO L226 Difference]: Without dead ends: 197 [2021-07-13 19:31:06,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 991.7ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:31:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-13 19:31:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 171. [2021-07-13 19:31:06,619 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) [2021-07-13 19:31:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 379 transitions. [2021-07-13 19:31:06,619 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 379 transitions. Word has length 18 [2021-07-13 19:31:06,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:06,619 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 379 transitions. [2021-07-13 19:31:06,619 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) [2021-07-13 19:31:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 379 transitions. [2021-07-13 19:31:06,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:06,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:06,620 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:06,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1398 [2021-07-13 19:31:06,821 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:06,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:06,821 INFO L82 PathProgramCache]: Analyzing trace with hash -61603364, now seen corresponding path program 193 times [2021-07-13 19:31:06,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:06,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253132008] [2021-07-13 19:31:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:06,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:06,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253132008] [2021-07-13 19:31:06,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253132008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:06,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344418832] [2021-07-13 19:31:06,996 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 [2021-07-13 19:31:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:07,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:07,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:07,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344418832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:07,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:07,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:07,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409231809] [2021-07-13 19:31:07,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:07,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:07,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:07,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:07,387 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) [2021-07-13 19:31:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:07,922 INFO L93 Difference]: Finished difference Result 238 states and 486 transitions. [2021-07-13 19:31:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:31:07,922 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 [2021-07-13 19:31:07,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:07,922 INFO L225 Difference]: With dead ends: 238 [2021-07-13 19:31:07,922 INFO L226 Difference]: Without dead ends: 216 [2021-07-13 19:31:07,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 726.8ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:31:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-13 19:31:07,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2021-07-13 19:31:07,924 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) [2021-07-13 19:31:07,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-07-13 19:31:07,925 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-07-13 19:31:07,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:07,925 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-07-13 19:31:07,925 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) [2021-07-13 19:31:07,925 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-07-13 19:31:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:07,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:07,925 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:08,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-07-13 19:31:08,126 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:08,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:08,126 INFO L82 PathProgramCache]: Analyzing trace with hash 444742902, now seen corresponding path program 194 times [2021-07-13 19:31:08,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:08,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053626522] [2021-07-13 19:31:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:08,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:08,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053626522] [2021-07-13 19:31:08,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053626522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:08,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168154654] [2021-07-13 19:31:08,268 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 [2021-07-13 19:31:08,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:08,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:08,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:08,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:08,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168154654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:08,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:08,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:08,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782549581] [2021-07-13 19:31:08,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:08,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:08,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:08,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:08,686 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) [2021-07-13 19:31:09,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:09,253 INFO L93 Difference]: Finished difference Result 240 states and 490 transitions. [2021-07-13 19:31:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:31:09,253 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 [2021-07-13 19:31:09,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:09,254 INFO L225 Difference]: With dead ends: 240 [2021-07-13 19:31:09,254 INFO L226 Difference]: Without dead ends: 215 [2021-07-13 19:31:09,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 776.7ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:31:09,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-07-13 19:31:09,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 169. [2021-07-13 19:31:09,255 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) [2021-07-13 19:31:09,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 375 transitions. [2021-07-13 19:31:09,256 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 375 transitions. Word has length 18 [2021-07-13 19:31:09,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:09,256 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 375 transitions. [2021-07-13 19:31:09,256 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) [2021-07-13 19:31:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 375 transitions. [2021-07-13 19:31:09,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:09,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:09,256 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:09,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1423 [2021-07-13 19:31:09,457 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:09,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:09,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1038392036, now seen corresponding path program 195 times [2021-07-13 19:31:09,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:09,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419789896] [2021-07-13 19:31:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:09,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:09,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419789896] [2021-07-13 19:31:09,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419789896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:09,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496129631] [2021-07-13 19:31:09,602 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 [2021-07-13 19:31:09,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:31:09,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:09,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:31:09,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:10,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496129631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:10,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:10,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:31:10,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988209066] [2021-07-13 19:31:10,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:31:10,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:10,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:31:10,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:31:10,002 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) [2021-07-13 19:31:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:11,078 INFO L93 Difference]: Finished difference Result 255 states and 513 transitions. [2021-07-13 19:31:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:31:11,079 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 [2021-07-13 19:31:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:11,079 INFO L225 Difference]: With dead ends: 255 [2021-07-13 19:31:11,079 INFO L226 Difference]: Without dead ends: 217 [2021-07-13 19:31:11,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1218.5ms TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:31:11,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-13 19:31:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 170. [2021-07-13 19:31:11,081 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) [2021-07-13 19:31:11,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-07-13 19:31:11,081 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-07-13 19:31:11,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:11,081 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-07-13 19:31:11,081 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) [2021-07-13 19:31:11,081 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-07-13 19:31:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:11,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:11,082 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:11,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:11,282 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:11,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:11,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1142907740, now seen corresponding path program 196 times [2021-07-13 19:31:11,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:11,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889397569] [2021-07-13 19:31:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:11,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:11,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889397569] [2021-07-13 19:31:11,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889397569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:11,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993346583] [2021-07-13 19:31:11,418 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 [2021-07-13 19:31:11,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:11,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:11,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:31:11,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:11,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993346583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:11,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:11,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:31:11,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568777096] [2021-07-13 19:31:11,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:31:11,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:11,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:31:11,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:31:11,749 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) [2021-07-13 19:31:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:12,100 INFO L93 Difference]: Finished difference Result 188 states and 403 transitions. [2021-07-13 19:31:12,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:31:12,100 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 [2021-07-13 19:31:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:12,100 INFO L225 Difference]: With dead ends: 188 [2021-07-13 19:31:12,100 INFO L226 Difference]: Without dead ends: 173 [2021-07-13 19:31:12,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 573.0ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:31:12,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-13 19:31:12,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2021-07-13 19:31:12,102 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) [2021-07-13 19:31:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 379 transitions. [2021-07-13 19:31:12,102 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 379 transitions. Word has length 18 [2021-07-13 19:31:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:12,102 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 379 transitions. [2021-07-13 19:31:12,102 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) [2021-07-13 19:31:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 379 transitions. [2021-07-13 19:31:12,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:12,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:12,103 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:12,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1446 [2021-07-13 19:31:12,303 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:12,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:12,303 INFO L82 PathProgramCache]: Analyzing trace with hash -510045634, now seen corresponding path program 197 times [2021-07-13 19:31:12,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:12,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049319000] [2021-07-13 19:31:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:12,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:12,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049319000] [2021-07-13 19:31:12,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049319000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:12,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796734662] [2021-07-13 19:31:12,488 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 [2021-07-13 19:31:12,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:31:12,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:12,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:12,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:12,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796734662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:12,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:12,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:31:12,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255141165] [2021-07-13 19:31:12,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:31:12,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:12,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:31:12,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:31:12,865 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) [2021-07-13 19:31:13,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:13,210 INFO L93 Difference]: Finished difference Result 187 states and 402 transitions. [2021-07-13 19:31:13,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:31:13,210 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 [2021-07-13 19:31:13,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:13,211 INFO L225 Difference]: With dead ends: 187 [2021-07-13 19:31:13,211 INFO L226 Difference]: Without dead ends: 174 [2021-07-13 19:31:13,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 660.0ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:31:13,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-13 19:31:13,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2021-07-13 19:31:13,212 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) [2021-07-13 19:31:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 381 transitions. [2021-07-13 19:31:13,213 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 381 transitions. Word has length 18 [2021-07-13 19:31:13,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:13,213 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 381 transitions. [2021-07-13 19:31:13,213 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) [2021-07-13 19:31:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 381 transitions. [2021-07-13 19:31:13,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:13,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:13,213 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:13,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1456 [2021-07-13 19:31:13,414 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:13,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2087387364, now seen corresponding path program 198 times [2021-07-13 19:31:13,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:13,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313352262] [2021-07-13 19:31:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:13,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:13,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313352262] [2021-07-13 19:31:13,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313352262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:13,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542393292] [2021-07-13 19:31:13,600 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 [2021-07-13 19:31:13,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:31:13,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:13,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:13,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:14,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542393292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:14,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:14,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:31:14,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926909277] [2021-07-13 19:31:14,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:31:14,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:14,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:31:14,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:31:14,018 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) [2021-07-13 19:31:14,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:14,909 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2021-07-13 19:31:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:31:14,909 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 [2021-07-13 19:31:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:14,910 INFO L225 Difference]: With dead ends: 228 [2021-07-13 19:31:14,910 INFO L226 Difference]: Without dead ends: 196 [2021-07-13 19:31:14,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1146.0ms TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:31:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-07-13 19:31:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 170. [2021-07-13 19:31:14,911 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) [2021-07-13 19:31:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-07-13 19:31:14,912 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-07-13 19:31:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:14,912 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-07-13 19:31:14,912 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) [2021-07-13 19:31:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-07-13 19:31:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:14,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:14,912 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:15,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1467,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:15,113 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:15,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:15,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1993180572, now seen corresponding path program 199 times [2021-07-13 19:31:15,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:15,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4207019] [2021-07-13 19:31:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:15,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:15,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4207019] [2021-07-13 19:31:15,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4207019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:15,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811255693] [2021-07-13 19:31:15,274 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 [2021-07-13 19:31:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:15,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:31:15,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:15,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811255693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:15,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:15,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:15,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606928782] [2021-07-13 19:31:15,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:15,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:15,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:15,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:15,620 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) [2021-07-13 19:31:15,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:15,935 INFO L93 Difference]: Finished difference Result 187 states and 404 transitions. [2021-07-13 19:31:15,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:31:15,935 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 [2021-07-13 19:31:15,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:15,935 INFO L225 Difference]: With dead ends: 187 [2021-07-13 19:31:15,935 INFO L226 Difference]: Without dead ends: 180 [2021-07-13 19:31:15,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 565.0ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:31:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-13 19:31:15,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2021-07-13 19:31:15,937 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) [2021-07-13 19:31:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 382 transitions. [2021-07-13 19:31:15,937 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 382 transitions. Word has length 18 [2021-07-13 19:31:15,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:15,937 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 382 transitions. [2021-07-13 19:31:15,937 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) [2021-07-13 19:31:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 382 transitions. [2021-07-13 19:31:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:15,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:15,938 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:16,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-07-13 19:31:16,138 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:16,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash 724444994, now seen corresponding path program 200 times [2021-07-13 19:31:16,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:16,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402564822] [2021-07-13 19:31:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:16,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:16,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402564822] [2021-07-13 19:31:16,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402564822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:16,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076198874] [2021-07-13 19:31:16,339 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 [2021-07-13 19:31:16,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:16,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:16,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:16,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:16,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076198874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:16,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:16,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:16,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381310206] [2021-07-13 19:31:16,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:16,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:16,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:16,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:16,725 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) [2021-07-13 19:31:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:17,231 INFO L93 Difference]: Finished difference Result 218 states and 454 transitions. [2021-07-13 19:31:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:31:17,231 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 [2021-07-13 19:31:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:17,231 INFO L225 Difference]: With dead ends: 218 [2021-07-13 19:31:17,231 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 19:31:17,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 770.6ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:31:17,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 19:31:17,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 173. [2021-07-13 19:31:17,233 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) [2021-07-13 19:31:17,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-07-13 19:31:17,234 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 18 [2021-07-13 19:31:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:17,234 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-07-13 19:31:17,234 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) [2021-07-13 19:31:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-07-13 19:31:17,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:17,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:17,234 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:17,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:17,434 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:17,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2059036324, now seen corresponding path program 201 times [2021-07-13 19:31:17,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:17,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220639353] [2021-07-13 19:31:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:17,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:17,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220639353] [2021-07-13 19:31:17,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220639353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:17,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889292887] [2021-07-13 19:31:17,568 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 [2021-07-13 19:31:17,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:31:17,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:17,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:17,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:17,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889292887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:17,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:17,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:17,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495327759] [2021-07-13 19:31:17,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:17,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:17,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:17,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:17,924 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) [2021-07-13 19:31:18,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:18,925 INFO L93 Difference]: Finished difference Result 250 states and 508 transitions. [2021-07-13 19:31:18,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:31:18,926 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 [2021-07-13 19:31:18,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:18,926 INFO L225 Difference]: With dead ends: 250 [2021-07-13 19:31:18,926 INFO L226 Difference]: Without dead ends: 224 [2021-07-13 19:31:18,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1115.6ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:31:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-13 19:31:18,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 174. [2021-07-13 19:31:18,928 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) [2021-07-13 19:31:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 386 transitions. [2021-07-13 19:31:18,928 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 386 transitions. Word has length 18 [2021-07-13 19:31:18,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:18,928 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 386 transitions. [2021-07-13 19:31:18,928 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) [2021-07-13 19:31:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 386 transitions. [2021-07-13 19:31:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:18,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:18,929 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:19,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1502 [2021-07-13 19:31:19,138 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:19,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:19,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1437986497, now seen corresponding path program 202 times [2021-07-13 19:31:19,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:19,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543861900] [2021-07-13 19:31:19,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:31:19,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:19,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543861900] [2021-07-13 19:31:19,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543861900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:19,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159765848] [2021-07-13 19:31:19,210 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 [2021-07-13 19:31:19,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:19,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:19,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:31:19,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:31:19,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159765848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:19,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:19,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:31:19,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389938024] [2021-07-13 19:31:19,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:31:19,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:19,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:31:19,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:31:19,351 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) [2021-07-13 19:31:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:19,639 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2021-07-13 19:31:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:31:19,640 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 [2021-07-13 19:31:19,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:19,640 INFO L225 Difference]: With dead ends: 207 [2021-07-13 19:31:19,640 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 19:31:19,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:31:19,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 19:31:19,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 174. [2021-07-13 19:31:19,642 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) [2021-07-13 19:31:19,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 386 transitions. [2021-07-13 19:31:19,642 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 386 transitions. Word has length 18 [2021-07-13 19:31:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:19,642 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 386 transitions. [2021-07-13 19:31:19,642 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) [2021-07-13 19:31:19,643 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 386 transitions. [2021-07-13 19:31:19,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:19,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:19,643 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:19,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1515,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:19,843 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:19,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1230791260, now seen corresponding path program 203 times [2021-07-13 19:31:19,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:19,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416734637] [2021-07-13 19:31:19,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:20,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:20,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416734637] [2021-07-13 19:31:20,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416734637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:20,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427863374] [2021-07-13 19:31:20,040 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 [2021-07-13 19:31:20,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:31:20,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:20,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:31:20,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:20,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427863374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:20,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:20,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:20,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344858345] [2021-07-13 19:31:20,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:20,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:20,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:20,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:20,466 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) [2021-07-13 19:31:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:21,106 INFO L93 Difference]: Finished difference Result 227 states and 468 transitions. [2021-07-13 19:31:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:31:21,106 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 [2021-07-13 19:31:21,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:21,107 INFO L225 Difference]: With dead ends: 227 [2021-07-13 19:31:21,107 INFO L226 Difference]: Without dead ends: 216 [2021-07-13 19:31:21,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 952.7ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:31:21,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-13 19:31:21,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 176. [2021-07-13 19:31:21,108 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) [2021-07-13 19:31:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 390 transitions. [2021-07-13 19:31:21,109 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 390 transitions. Word has length 18 [2021-07-13 19:31:21,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:21,109 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 390 transitions. [2021-07-13 19:31:21,109 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) [2021-07-13 19:31:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 390 transitions. [2021-07-13 19:31:21,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:21,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:21,109 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:21,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1520 [2021-07-13 19:31:21,310 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:21,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:21,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1729584706, now seen corresponding path program 204 times [2021-07-13 19:31:21,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:21,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938664357] [2021-07-13 19:31:21,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:21,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:21,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938664357] [2021-07-13 19:31:21,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938664357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:21,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667603713] [2021-07-13 19:31:21,448 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 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 [2021-07-13 19:31:21,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:31:21,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:21,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:31:21,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:21,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667603713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:21,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:21,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:21,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893928339] [2021-07-13 19:31:21,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:21,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:21,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:21,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:21,752 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) [2021-07-13 19:31:22,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:22,617 INFO L93 Difference]: Finished difference Result 273 states and 546 transitions. [2021-07-13 19:31:22,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:31:22,617 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 [2021-07-13 19:31:22,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:22,617 INFO L225 Difference]: With dead ends: 273 [2021-07-13 19:31:22,618 INFO L226 Difference]: Without dead ends: 254 [2021-07-13 19:31:22,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 939.0ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:31:22,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-13 19:31:22,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 178. [2021-07-13 19:31:22,620 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) [2021-07-13 19:31:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-07-13 19:31:22,620 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 18 [2021-07-13 19:31:22,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:22,620 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-07-13 19:31:22,620 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) [2021-07-13 19:31:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-07-13 19:31:22,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:22,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:22,620 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:22,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1530,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:22,821 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:22,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2027527012, now seen corresponding path program 205 times [2021-07-13 19:31:22,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:22,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340956599] [2021-07-13 19:31:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:22,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:22,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340956599] [2021-07-13 19:31:22,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340956599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:22,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881256883] [2021-07-13 19:31:22,959 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 [2021-07-13 19:31:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:22,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:31:22,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:23,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881256883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:23,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:23,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:23,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913763391] [2021-07-13 19:31:23,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:23,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:23,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:23,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:23,236 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) [2021-07-13 19:31:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:24,046 INFO L93 Difference]: Finished difference Result 262 states and 533 transitions. [2021-07-13 19:31:24,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:31:24,046 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 [2021-07-13 19:31:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:24,047 INFO L225 Difference]: With dead ends: 262 [2021-07-13 19:31:24,047 INFO L226 Difference]: Without dead ends: 236 [2021-07-13 19:31:24,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 886.5ms TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:31:24,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-13 19:31:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 174. [2021-07-13 19:31:24,049 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) [2021-07-13 19:31:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 383 transitions. [2021-07-13 19:31:24,049 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 383 transitions. Word has length 18 [2021-07-13 19:31:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:24,049 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 383 transitions. [2021-07-13 19:31:24,049 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) [2021-07-13 19:31:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 383 transitions. [2021-07-13 19:31:24,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:24,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:24,049 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:24,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1542 [2021-07-13 19:31:24,250 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:24,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:24,250 INFO L82 PathProgramCache]: Analyzing trace with hash -725723394, now seen corresponding path program 206 times [2021-07-13 19:31:24,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:24,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605754016] [2021-07-13 19:31:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:24,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:24,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605754016] [2021-07-13 19:31:24,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605754016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:24,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084226946] [2021-07-13 19:31:24,397 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 [2021-07-13 19:31:24,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:24,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:24,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:24,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:24,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084226946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:24,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:24,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:24,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527411570] [2021-07-13 19:31:24,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:24,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:24,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:24,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:24,748 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) [2021-07-13 19:31:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:25,174 INFO L93 Difference]: Finished difference Result 210 states and 446 transitions. [2021-07-13 19:31:25,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:31:25,174 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 [2021-07-13 19:31:25,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:25,175 INFO L225 Difference]: With dead ends: 210 [2021-07-13 19:31:25,175 INFO L226 Difference]: Without dead ends: 197 [2021-07-13 19:31:25,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 634.0ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:31:25,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-13 19:31:25,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 176. [2021-07-13 19:31:25,176 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) [2021-07-13 19:31:25,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 387 transitions. [2021-07-13 19:31:25,177 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 387 transitions. Word has length 18 [2021-07-13 19:31:25,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:25,177 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 387 transitions. [2021-07-13 19:31:25,177 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) [2021-07-13 19:31:25,177 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 387 transitions. [2021-07-13 19:31:25,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:25,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:25,177 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:25,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1552 [2021-07-13 19:31:25,378 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:25,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1991902172, now seen corresponding path program 207 times [2021-07-13 19:31:25,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:25,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878375818] [2021-07-13 19:31:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:25,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:25,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878375818] [2021-07-13 19:31:25,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878375818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:25,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152066483] [2021-07-13 19:31:25,566 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 [2021-07-13 19:31:25,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:31:25,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:25,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:31:25,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:25,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152066483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:25,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:25,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:25,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395555012] [2021-07-13 19:31:25,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:25,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:25,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:25,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:25,936 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) [2021-07-13 19:31:26,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:26,682 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2021-07-13 19:31:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:31:26,682 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 [2021-07-13 19:31:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:26,682 INFO L225 Difference]: With dead ends: 228 [2021-07-13 19:31:26,682 INFO L226 Difference]: Without dead ends: 217 [2021-07-13 19:31:26,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 984.1ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:31:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-13 19:31:26,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 177. [2021-07-13 19:31:26,684 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) [2021-07-13 19:31:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 389 transitions. [2021-07-13 19:31:26,685 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 389 transitions. Word has length 18 [2021-07-13 19:31:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:26,685 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 389 transitions. [2021-07-13 19:31:26,685 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) [2021-07-13 19:31:26,685 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 389 transitions. [2021-07-13 19:31:26,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:26,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:26,685 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:26,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1563 [2021-07-13 19:31:26,886 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:26,886 INFO L82 PathProgramCache]: Analyzing trace with hash -968473794, now seen corresponding path program 208 times [2021-07-13 19:31:26,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:26,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136967695] [2021-07-13 19:31:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:27,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:27,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136967695] [2021-07-13 19:31:27,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136967695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:27,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40173315] [2021-07-13 19:31:27,041 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 [2021-07-13 19:31:27,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:27,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:27,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:31:27,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:27,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40173315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:27,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:27,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:27,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696241579] [2021-07-13 19:31:27,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:27,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:27,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:27,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:27,399 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) [2021-07-13 19:31:28,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:28,139 INFO L93 Difference]: Finished difference Result 237 states and 483 transitions. [2021-07-13 19:31:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:31:28,140 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 [2021-07-13 19:31:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:28,140 INFO L225 Difference]: With dead ends: 237 [2021-07-13 19:31:28,140 INFO L226 Difference]: Without dead ends: 211 [2021-07-13 19:31:28,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 911.1ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:31:28,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-13 19:31:28,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 176. [2021-07-13 19:31:28,142 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) [2021-07-13 19:31:28,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 387 transitions. [2021-07-13 19:31:28,142 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 387 transitions. Word has length 18 [2021-07-13 19:31:28,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:28,142 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 387 transitions. [2021-07-13 19:31:28,142 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) [2021-07-13 19:31:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 387 transitions. [2021-07-13 19:31:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:28,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:28,142 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:28,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1574 [2021-07-13 19:31:28,343 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:28,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:28,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1796718858, now seen corresponding path program 209 times [2021-07-13 19:31:28,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:28,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512505700] [2021-07-13 19:31:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:28,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:28,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512505700] [2021-07-13 19:31:28,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512505700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:28,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455990745] [2021-07-13 19:31:28,556 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 [2021-07-13 19:31:28,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:31:28,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:28,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:31:28,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:28,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455990745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:28,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:28,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:28,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641970004] [2021-07-13 19:31:28,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:28,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:28,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:28,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:28,914 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) [2021-07-13 19:31:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:29,233 INFO L93 Difference]: Finished difference Result 207 states and 439 transitions. [2021-07-13 19:31:29,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:31:29,233 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 [2021-07-13 19:31:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:29,233 INFO L225 Difference]: With dead ends: 207 [2021-07-13 19:31:29,233 INFO L226 Difference]: Without dead ends: 196 [2021-07-13 19:31:29,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 599.3ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:31:29,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-07-13 19:31:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 178. [2021-07-13 19:31:29,235 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) [2021-07-13 19:31:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 391 transitions. [2021-07-13 19:31:29,235 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 391 transitions. Word has length 18 [2021-07-13 19:31:29,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:29,235 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 391 transitions. [2021-07-13 19:31:29,236 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) [2021-07-13 19:31:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 391 transitions. [2021-07-13 19:31:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:29,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:29,236 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:29,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-07-13 19:31:29,452 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:29,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:29,452 INFO L82 PathProgramCache]: Analyzing trace with hash -462127528, now seen corresponding path program 210 times [2021-07-13 19:31:29,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:29,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661717465] [2021-07-13 19:31:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:29,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:29,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661717465] [2021-07-13 19:31:29,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661717465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:29,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313392141] [2021-07-13 19:31:29,600 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 [2021-07-13 19:31:29,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:31:29,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:29,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:29,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:29,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313392141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:29,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:29,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:29,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383445251] [2021-07-13 19:31:29,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:29,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:29,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:29,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:29,930 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) [2021-07-13 19:31:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:30,933 INFO L93 Difference]: Finished difference Result 268 states and 536 transitions. [2021-07-13 19:31:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:31:30,934 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 [2021-07-13 19:31:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:30,934 INFO L225 Difference]: With dead ends: 268 [2021-07-13 19:31:30,934 INFO L226 Difference]: Without dead ends: 249 [2021-07-13 19:31:30,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1150.5ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:31:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-13 19:31:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 179. [2021-07-13 19:31:30,936 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) [2021-07-13 19:31:30,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 393 transitions. [2021-07-13 19:31:30,936 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 393 transitions. Word has length 18 [2021-07-13 19:31:30,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:30,936 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 393 transitions. [2021-07-13 19:31:30,936 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) [2021-07-13 19:31:30,937 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 393 transitions. [2021-07-13 19:31:30,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:30,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:30,937 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:31,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1596,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:31,154 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:31,154 INFO L82 PathProgramCache]: Analyzing trace with hash -999983106, now seen corresponding path program 211 times [2021-07-13 19:31:31,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:31,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117716418] [2021-07-13 19:31:31,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:31,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:31,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117716418] [2021-07-13 19:31:31,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117716418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:31,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285922369] [2021-07-13 19:31:31,297 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 [2021-07-13 19:31:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:31,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:31:31,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:31,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285922369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:31,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:31,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:31,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984460534] [2021-07-13 19:31:31,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:31,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:31,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:31,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:31,576 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) [2021-07-13 19:31:32,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:32,273 INFO L93 Difference]: Finished difference Result 245 states and 513 transitions. [2021-07-13 19:31:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:31:32,274 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 [2021-07-13 19:31:32,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:32,274 INFO L225 Difference]: With dead ends: 245 [2021-07-13 19:31:32,274 INFO L226 Difference]: Without dead ends: 226 [2021-07-13 19:31:32,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 788.6ms TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:31:32,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-13 19:31:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 182. [2021-07-13 19:31:32,276 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) [2021-07-13 19:31:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 402 transitions. [2021-07-13 19:31:32,276 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 402 transitions. Word has length 18 [2021-07-13 19:31:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:32,276 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 402 transitions. [2021-07-13 19:31:32,276 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) [2021-07-13 19:31:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 402 transitions. [2021-07-13 19:31:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:32,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:32,277 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:32,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1609,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:32,477 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:32,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:32,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1015113500, now seen corresponding path program 212 times [2021-07-13 19:31:32,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:32,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118232969] [2021-07-13 19:31:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:32,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:32,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118232969] [2021-07-13 19:31:32,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118232969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:32,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108604125] [2021-07-13 19:31:32,664 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 [2021-07-13 19:31:32,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:32,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:32,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:32,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:33,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108604125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:33,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:33,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:33,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346574658] [2021-07-13 19:31:33,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:33,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:33,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:33,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:33,013 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) [2021-07-13 19:31:33,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:33,821 INFO L93 Difference]: Finished difference Result 260 states and 519 transitions. [2021-07-13 19:31:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:33,821 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 [2021-07-13 19:31:33,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:33,822 INFO L225 Difference]: With dead ends: 260 [2021-07-13 19:31:33,822 INFO L226 Difference]: Without dead ends: 249 [2021-07-13 19:31:33,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1002.7ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:31:33,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-13 19:31:33,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 183. [2021-07-13 19:31:33,824 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) [2021-07-13 19:31:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 405 transitions. [2021-07-13 19:31:33,824 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 405 transitions. Word has length 18 [2021-07-13 19:31:33,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:33,824 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 405 transitions. [2021-07-13 19:31:33,824 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) [2021-07-13 19:31:33,824 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 405 transitions. [2021-07-13 19:31:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:33,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:33,825 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:34,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:34,025 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:34,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:34,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1698620183, now seen corresponding path program 213 times [2021-07-13 19:31:34,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:34,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090491233] [2021-07-13 19:31:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:31:34,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:34,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090491233] [2021-07-13 19:31:34,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090491233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:34,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674988242] [2021-07-13 19:31:34,110 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 [2021-07-13 19:31:34,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:31:34,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:34,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:31:34,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:31:34,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674988242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:34,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:34,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:31:34,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338487527] [2021-07-13 19:31:34,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:31:34,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:34,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:31:34,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:31:34,295 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) [2021-07-13 19:31:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:34,364 INFO L93 Difference]: Finished difference Result 184 states and 405 transitions. [2021-07-13 19:31:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:31:34,364 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 [2021-07-13 19:31:34,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:34,365 INFO L225 Difference]: With dead ends: 184 [2021-07-13 19:31:34,365 INFO L226 Difference]: Without dead ends: 184 [2021-07-13 19:31:34,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:31:34,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-13 19:31:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 176. [2021-07-13 19:31:34,366 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) [2021-07-13 19:31:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 390 transitions. [2021-07-13 19:31:34,367 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 390 transitions. Word has length 18 [2021-07-13 19:31:34,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:34,367 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 390 transitions. [2021-07-13 19:31:34,367 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) [2021-07-13 19:31:34,367 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 390 transitions. [2021-07-13 19:31:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:34,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:34,367 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:34,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1630 [2021-07-13 19:31:34,568 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:34,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1945262466, now seen corresponding path program 214 times [2021-07-13 19:31:34,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:34,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466201777] [2021-07-13 19:31:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:34,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:34,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466201777] [2021-07-13 19:31:34,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466201777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:34,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664539728] [2021-07-13 19:31:34,708 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 [2021-07-13 19:31:34,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:34,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:34,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:31:34,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:35,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664539728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:35,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:35,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:35,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081098750] [2021-07-13 19:31:35,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:35,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:35,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:35,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:35,052 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) [2021-07-13 19:31:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:35,662 INFO L93 Difference]: Finished difference Result 247 states and 500 transitions. [2021-07-13 19:31:35,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:31:35,662 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 [2021-07-13 19:31:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:35,663 INFO L225 Difference]: With dead ends: 247 [2021-07-13 19:31:35,663 INFO L226 Difference]: Without dead ends: 221 [2021-07-13 19:31:35,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 791.9ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:31:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-07-13 19:31:35,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 175. [2021-07-13 19:31:35,665 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) [2021-07-13 19:31:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 388 transitions. [2021-07-13 19:31:35,665 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 388 transitions. Word has length 18 [2021-07-13 19:31:35,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:35,665 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 388 transitions. [2021-07-13 19:31:35,665 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) [2021-07-13 19:31:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 388 transitions. [2021-07-13 19:31:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:35,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:35,665 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:35,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:35,866 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:35,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1811849252, now seen corresponding path program 215 times [2021-07-13 19:31:35,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:35,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141655661] [2021-07-13 19:31:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:36,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:36,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141655661] [2021-07-13 19:31:36,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141655661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:36,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788388419] [2021-07-13 19:31:36,004 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 [2021-07-13 19:31:36,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:31:36,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:36,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:31:36,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:36,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788388419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:36,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:36,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:36,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502330823] [2021-07-13 19:31:36,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:36,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:36,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:36,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:36,381 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) [2021-07-13 19:31:37,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:37,240 INFO L93 Difference]: Finished difference Result 254 states and 520 transitions. [2021-07-13 19:31:37,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:31:37,240 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 [2021-07-13 19:31:37,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:37,241 INFO L225 Difference]: With dead ends: 254 [2021-07-13 19:31:37,241 INFO L226 Difference]: Without dead ends: 227 [2021-07-13 19:31:37,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1043.1ms TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:31:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-13 19:31:37,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 178. [2021-07-13 19:31:37,243 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) [2021-07-13 19:31:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 397 transitions. [2021-07-13 19:31:37,243 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 397 transitions. Word has length 18 [2021-07-13 19:31:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:37,243 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 397 transitions. [2021-07-13 19:31:37,243 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) [2021-07-13 19:31:37,243 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 397 transitions. [2021-07-13 19:31:37,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:37,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:37,243 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:37,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1648 [2021-07-13 19:31:37,444 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:37,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:37,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1976771778, now seen corresponding path program 216 times [2021-07-13 19:31:37,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:37,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20858458] [2021-07-13 19:31:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:37,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:37,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20858458] [2021-07-13 19:31:37,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20858458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:37,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237806736] [2021-07-13 19:31:37,585 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 [2021-07-13 19:31:37,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:31:37,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:37,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:37,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:38,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237806736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:38,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:38,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:38,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914484894] [2021-07-13 19:31:38,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:38,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:38,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:38,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:38,003 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) [2021-07-13 19:31:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:39,190 INFO L93 Difference]: Finished difference Result 284 states and 575 transitions. [2021-07-13 19:31:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:31:39,191 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 [2021-07-13 19:31:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:39,191 INFO L225 Difference]: With dead ends: 284 [2021-07-13 19:31:39,191 INFO L226 Difference]: Without dead ends: 252 [2021-07-13 19:31:39,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1354.0ms TimeCoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:31:39,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-13 19:31:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 180. [2021-07-13 19:31:39,193 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) [2021-07-13 19:31:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 403 transitions. [2021-07-13 19:31:39,193 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 403 transitions. Word has length 18 [2021-07-13 19:31:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:39,193 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 403 transitions. [2021-07-13 19:31:39,194 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) [2021-07-13 19:31:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 403 transitions. [2021-07-13 19:31:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:39,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:39,194 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:39,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1659 [2021-07-13 19:31:39,399 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:39,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:39,399 INFO L82 PathProgramCache]: Analyzing trace with hash -89256540, now seen corresponding path program 217 times [2021-07-13 19:31:39,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:39,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303003740] [2021-07-13 19:31:39,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:39,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:39,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303003740] [2021-07-13 19:31:39,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303003740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:39,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141201750] [2021-07-13 19:31:39,583 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 [2021-07-13 19:31:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:39,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:39,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:39,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141201750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:39,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:39,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:39,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170610915] [2021-07-13 19:31:39,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:39,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:39,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:39,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:39,974 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) [2021-07-13 19:31:40,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:40,335 INFO L93 Difference]: Finished difference Result 198 states and 431 transitions. [2021-07-13 19:31:40,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:31:40,335 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 [2021-07-13 19:31:40,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:40,335 INFO L225 Difference]: With dead ends: 198 [2021-07-13 19:31:40,335 INFO L226 Difference]: Without dead ends: 185 [2021-07-13 19:31:40,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:31:40,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-07-13 19:31:40,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2021-07-13 19:31:40,337 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) [2021-07-13 19:31:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 405 transitions. [2021-07-13 19:31:40,337 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 405 transitions. Word has length 18 [2021-07-13 19:31:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:40,337 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 405 transitions. [2021-07-13 19:31:40,337 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) [2021-07-13 19:31:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 405 transitions. [2021-07-13 19:31:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:40,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:40,338 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:40,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-07-13 19:31:40,538 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:40,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:40,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1666598270, now seen corresponding path program 218 times [2021-07-13 19:31:40,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:40,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986191583] [2021-07-13 19:31:40,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:40,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:40,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986191583] [2021-07-13 19:31:40,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986191583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:40,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135382797] [2021-07-13 19:31:40,802 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 [2021-07-13 19:31:40,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:40,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:40,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:31:40,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:41,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135382797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:41,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:41,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:41,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948142031] [2021-07-13 19:31:41,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:41,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:41,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:41,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:41,170 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) [2021-07-13 19:31:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:42,130 INFO L93 Difference]: Finished difference Result 211 states and 455 transitions. [2021-07-13 19:31:42,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:31:42,130 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 [2021-07-13 19:31:42,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:42,130 INFO L225 Difference]: With dead ends: 211 [2021-07-13 19:31:42,130 INFO L226 Difference]: Without dead ends: 200 [2021-07-13 19:31:42,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1192.1ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:31:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-13 19:31:42,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 182. [2021-07-13 19:31:42,132 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) [2021-07-13 19:31:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 407 transitions. [2021-07-13 19:31:42,133 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 407 transitions. Word has length 18 [2021-07-13 19:31:42,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:42,133 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 407 transitions. [2021-07-13 19:31:42,133 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) [2021-07-13 19:31:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 407 transitions. [2021-07-13 19:31:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:42,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:42,133 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:42,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1680 [2021-07-13 19:31:42,333 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:42,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:42,334 INFO L82 PathProgramCache]: Analyzing trace with hash -332006940, now seen corresponding path program 219 times [2021-07-13 19:31:42,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:42,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952028404] [2021-07-13 19:31:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:42,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:42,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952028404] [2021-07-13 19:31:42,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952028404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:42,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333952522] [2021-07-13 19:31:42,566 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 [2021-07-13 19:31:42,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:31:42,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:42,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:31:42,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:42,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333952522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:42,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:42,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:42,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144084311] [2021-07-13 19:31:42,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:42,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:42,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:42,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:42,878 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) [2021-07-13 19:31:43,769 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-07-13 19:31:44,227 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2021-07-13 19:31:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:44,614 INFO L93 Difference]: Finished difference Result 264 states and 548 transitions. [2021-07-13 19:31:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:31:44,614 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 [2021-07-13 19:31:44,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:44,614 INFO L225 Difference]: With dead ends: 264 [2021-07-13 19:31:44,614 INFO L226 Difference]: Without dead ends: 238 [2021-07-13 19:31:44,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1856.2ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:31:44,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-13 19:31:44,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 185. [2021-07-13 19:31:44,616 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) [2021-07-13 19:31:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 417 transitions. [2021-07-13 19:31:44,616 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 417 transitions. Word has length 18 [2021-07-13 19:31:44,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:44,617 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 417 transitions. [2021-07-13 19:31:44,617 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) [2021-07-13 19:31:44,617 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 417 transitions. [2021-07-13 19:31:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:44,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:44,617 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:44,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1693 [2021-07-13 19:31:44,818 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:44,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:44,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1160252004, now seen corresponding path program 220 times [2021-07-13 19:31:44,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:44,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632083291] [2021-07-13 19:31:44,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:45,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:45,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632083291] [2021-07-13 19:31:45,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632083291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:45,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396593709] [2021-07-13 19:31:45,004 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 [2021-07-13 19:31:45,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:45,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:45,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:45,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:45,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396593709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:45,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:45,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:45,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388772607] [2021-07-13 19:31:45,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:45,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:45,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:45,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:45,355 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) [2021-07-13 19:31:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:45,983 INFO L93 Difference]: Finished difference Result 217 states and 472 transitions. [2021-07-13 19:31:45,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:31:45,984 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 [2021-07-13 19:31:45,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:45,984 INFO L225 Difference]: With dead ends: 217 [2021-07-13 19:31:45,984 INFO L226 Difference]: Without dead ends: 206 [2021-07-13 19:31:45,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 842.0ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:31:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-07-13 19:31:45,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2021-07-13 19:31:45,986 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) [2021-07-13 19:31:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 421 transitions. [2021-07-13 19:31:45,986 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 421 transitions. Word has length 18 [2021-07-13 19:31:45,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:45,986 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 421 transitions. [2021-07-13 19:31:45,986 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) [2021-07-13 19:31:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 421 transitions. [2021-07-13 19:31:45,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:45,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:45,987 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:46,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:46,203 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:46,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:46,204 INFO L82 PathProgramCache]: Analyzing trace with hash 174339326, now seen corresponding path program 221 times [2021-07-13 19:31:46,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:46,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461141803] [2021-07-13 19:31:46,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:46,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:46,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461141803] [2021-07-13 19:31:46,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461141803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:46,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341840147] [2021-07-13 19:31:46,377 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 [2021-07-13 19:31:46,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:31:46,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:46,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:46,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:46,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341840147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:46,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:46,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:46,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9410330] [2021-07-13 19:31:46,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:46,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:46,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:46,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:46,719 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) [2021-07-13 19:31:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:47,465 INFO L93 Difference]: Finished difference Result 263 states and 543 transitions. [2021-07-13 19:31:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:31:47,465 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 [2021-07-13 19:31:47,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:47,466 INFO L225 Difference]: With dead ends: 263 [2021-07-13 19:31:47,466 INFO L226 Difference]: Without dead ends: 244 [2021-07-13 19:31:47,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 893.6ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:31:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-13 19:31:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 186. [2021-07-13 19:31:47,468 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) [2021-07-13 19:31:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 419 transitions. [2021-07-13 19:31:47,468 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 419 transitions. Word has length 18 [2021-07-13 19:31:47,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:47,468 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 419 transitions. [2021-07-13 19:31:47,468 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) [2021-07-13 19:31:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 419 transitions. [2021-07-13 19:31:47,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:47,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:47,468 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:47,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1714 [2021-07-13 19:31:47,669 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:47,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:47,669 INFO L82 PathProgramCache]: Analyzing trace with hash -363516252, now seen corresponding path program 222 times [2021-07-13 19:31:47,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:47,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152316067] [2021-07-13 19:31:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:47,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:47,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152316067] [2021-07-13 19:31:47,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152316067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:47,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448641070] [2021-07-13 19:31:47,817 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 [2021-07-13 19:31:47,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:31:47,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:47,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:47,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:48,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448641070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:48,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:48,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:48,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389715965] [2021-07-13 19:31:48,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:48,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:48,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:48,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:48,212 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) [2021-07-13 19:31:49,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:49,030 INFO L93 Difference]: Finished difference Result 265 states and 553 transitions. [2021-07-13 19:31:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:31:49,031 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 [2021-07-13 19:31:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:49,031 INFO L225 Difference]: With dead ends: 265 [2021-07-13 19:31:49,031 INFO L226 Difference]: Without dead ends: 204 [2021-07-13 19:31:49,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1049.8ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:31:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-13 19:31:49,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 188. [2021-07-13 19:31:49,033 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) [2021-07-13 19:31:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 423 transitions. [2021-07-13 19:31:49,034 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 423 transitions. Word has length 18 [2021-07-13 19:31:49,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:49,034 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 423 transitions. [2021-07-13 19:31:49,034 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) [2021-07-13 19:31:49,034 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 423 transitions. [2021-07-13 19:31:49,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:49,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:49,034 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:49,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1727,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:49,235 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:49,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1651580354, now seen corresponding path program 223 times [2021-07-13 19:31:49,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:49,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267524692] [2021-07-13 19:31:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:49,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:49,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267524692] [2021-07-13 19:31:49,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267524692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:49,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220454149] [2021-07-13 19:31:49,424 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 [2021-07-13 19:31:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:49,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:49,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:49,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220454149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:49,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:49,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:49,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106126341] [2021-07-13 19:31:49,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:49,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:49,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:49,783 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) [2021-07-13 19:31:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:50,416 INFO L93 Difference]: Finished difference Result 245 states and 511 transitions. [2021-07-13 19:31:50,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:50,417 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 [2021-07-13 19:31:50,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:50,417 INFO L225 Difference]: With dead ends: 245 [2021-07-13 19:31:50,417 INFO L226 Difference]: Without dead ends: 213 [2021-07-13 19:31:50,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 849.6ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:31:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-13 19:31:50,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 190. [2021-07-13 19:31:50,419 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) [2021-07-13 19:31:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 427 transitions. [2021-07-13 19:31:50,419 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 427 transitions. Word has length 18 [2021-07-13 19:31:50,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:50,419 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 427 transitions. [2021-07-13 19:31:50,419 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) [2021-07-13 19:31:50,419 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 427 transitions. [2021-07-13 19:31:50,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:50,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:50,420 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:50,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1739,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:50,620 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:50,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:50,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1846651190, now seen corresponding path program 224 times [2021-07-13 19:31:50,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:50,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513179957] [2021-07-13 19:31:50,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:50,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:50,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513179957] [2021-07-13 19:31:50,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513179957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:50,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206114802] [2021-07-13 19:31:50,771 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 [2021-07-13 19:31:50,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:31:50,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:50,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:31:50,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:51,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206114802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:51,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:51,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:51,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631919879] [2021-07-13 19:31:51,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:51,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:51,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:51,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:51,154 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) [2021-07-13 19:31:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:51,766 INFO L93 Difference]: Finished difference Result 266 states and 546 transitions. [2021-07-13 19:31:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:31:51,766 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 [2021-07-13 19:31:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:51,766 INFO L225 Difference]: With dead ends: 266 [2021-07-13 19:31:51,766 INFO L226 Difference]: Without dead ends: 234 [2021-07-13 19:31:51,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 808.2ms TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:31:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-13 19:31:51,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 189. [2021-07-13 19:31:51,768 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) [2021-07-13 19:31:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 425 transitions. [2021-07-13 19:31:51,768 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 425 transitions. Word has length 18 [2021-07-13 19:31:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:51,769 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 425 transitions. [2021-07-13 19:31:51,769 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) [2021-07-13 19:31:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 425 transitions. [2021-07-13 19:31:51,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:51,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:51,769 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:51,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-07-13 19:31:51,970 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:51,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:51,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1340304924, now seen corresponding path program 225 times [2021-07-13 19:31:51,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:51,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265859764] [2021-07-13 19:31:51,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:52,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:52,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265859764] [2021-07-13 19:31:52,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265859764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:52,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770296997] [2021-07-13 19:31:52,115 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 [2021-07-13 19:31:52,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:31:52,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:52,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:52,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:52,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770296997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:52,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:52,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:52,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462789794] [2021-07-13 19:31:52,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:52,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:52,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:52,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:52,457 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) [2021-07-13 19:31:53,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:53,086 INFO L93 Difference]: Finished difference Result 270 states and 554 transitions. [2021-07-13 19:31:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:31:53,086 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 [2021-07-13 19:31:53,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:53,086 INFO L225 Difference]: With dead ends: 270 [2021-07-13 19:31:53,086 INFO L226 Difference]: Without dead ends: 235 [2021-07-13 19:31:53,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 761.6ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:31:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-13 19:31:53,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 188. [2021-07-13 19:31:53,088 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) [2021-07-13 19:31:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 423 transitions. [2021-07-13 19:31:53,089 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 423 transitions. Word has length 18 [2021-07-13 19:31:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:53,089 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 423 transitions. [2021-07-13 19:31:53,089 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) [2021-07-13 19:31:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 423 transitions. [2021-07-13 19:31:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:53,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:53,089 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:53,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-07-13 19:31:53,290 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:53,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:53,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1375929764, now seen corresponding path program 226 times [2021-07-13 19:31:53,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:53,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833955529] [2021-07-13 19:31:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:53,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:53,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833955529] [2021-07-13 19:31:53,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833955529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:53,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436487097] [2021-07-13 19:31:53,519 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 [2021-07-13 19:31:53,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:31:53,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:53,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:31:53,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:53,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436487097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:53,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:53,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:53,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181349721] [2021-07-13 19:31:53,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:53,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:53,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:53,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:53,869 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) [2021-07-13 19:31:54,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:54,971 INFO L93 Difference]: Finished difference Result 265 states and 542 transitions. [2021-07-13 19:31:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:31:54,971 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 [2021-07-13 19:31:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:54,972 INFO L225 Difference]: With dead ends: 265 [2021-07-13 19:31:54,972 INFO L226 Difference]: Without dead ends: 233 [2021-07-13 19:31:54,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1263.1ms TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:31:54,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-07-13 19:31:54,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 188. [2021-07-13 19:31:54,973 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) [2021-07-13 19:31:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 422 transitions. [2021-07-13 19:31:54,974 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 422 transitions. Word has length 18 [2021-07-13 19:31:54,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:54,974 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 422 transitions. [2021-07-13 19:31:54,974 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) [2021-07-13 19:31:54,974 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 422 transitions. [2021-07-13 19:31:54,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:54,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:54,974 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:55,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1771 [2021-07-13 19:31:55,175 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:55,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:55,175 INFO L82 PathProgramCache]: Analyzing trace with hash -579194012, now seen corresponding path program 227 times [2021-07-13 19:31:55,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:55,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132983470] [2021-07-13 19:31:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:55,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:55,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132983470] [2021-07-13 19:31:55,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132983470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:55,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236573473] [2021-07-13 19:31:55,320 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 [2021-07-13 19:31:55,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:31:55,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:55,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:55,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:55,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236573473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:55,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:55,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:55,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549165889] [2021-07-13 19:31:55,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:55,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:55,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:55,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:55,711 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) [2021-07-13 19:31:56,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:56,268 INFO L93 Difference]: Finished difference Result 267 states and 547 transitions. [2021-07-13 19:31:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:31:56,269 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 [2021-07-13 19:31:56,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:56,269 INFO L225 Difference]: With dead ends: 267 [2021-07-13 19:31:56,269 INFO L226 Difference]: Without dead ends: 245 [2021-07-13 19:31:56,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 687.3ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:31:56,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-13 19:31:56,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 188. [2021-07-13 19:31:56,271 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) [2021-07-13 19:31:56,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 422 transitions. [2021-07-13 19:31:56,272 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 422 transitions. Word has length 18 [2021-07-13 19:31:56,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:56,272 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 422 transitions. [2021-07-13 19:31:56,272 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) [2021-07-13 19:31:56,272 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 422 transitions. [2021-07-13 19:31:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:56,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:56,272 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:56,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1784,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:31:56,473 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:56,473 INFO L82 PathProgramCache]: Analyzing trace with hash -72847746, now seen corresponding path program 228 times [2021-07-13 19:31:56,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:56,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508883528] [2021-07-13 19:31:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:56,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:56,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508883528] [2021-07-13 19:31:56,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508883528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:56,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908734443] [2021-07-13 19:31:56,638 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 [2021-07-13 19:31:56,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:31:56,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:31:56,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:31:56,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:57,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908734443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:57,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:57,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:31:57,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83894439] [2021-07-13 19:31:57,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:31:57,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:57,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:31:57,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:31:57,056 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) [2021-07-13 19:31:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:58,078 INFO L93 Difference]: Finished difference Result 305 states and 613 transitions. [2021-07-13 19:31:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:31:58,078 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 [2021-07-13 19:31:58,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:58,079 INFO L225 Difference]: With dead ends: 305 [2021-07-13 19:31:58,079 INFO L226 Difference]: Without dead ends: 245 [2021-07-13 19:31:58,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1221.5ms TimeCoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:31:58,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-13 19:31:58,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 192. [2021-07-13 19:31:58,081 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) [2021-07-13 19:31:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 432 transitions. [2021-07-13 19:31:58,081 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 432 transitions. Word has length 18 [2021-07-13 19:31:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:58,081 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 432 transitions. [2021-07-13 19:31:58,081 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) [2021-07-13 19:31:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 432 transitions. [2021-07-13 19:31:58,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:58,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:58,081 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:31:58,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-07-13 19:31:58,282 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:31:58,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:31:58,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1555982684, now seen corresponding path program 229 times [2021-07-13 19:31:58,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:31:58,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648075690] [2021-07-13 19:31:58,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:31:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:58,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:31:58,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648075690] [2021-07-13 19:31:58,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648075690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:58,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849197170] [2021-07-13 19:31:58,430 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 [2021-07-13 19:31:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:31:58,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:31:58,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:31:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:31:58,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849197170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:31:58,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:31:58,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:31:58,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285584894] [2021-07-13 19:31:58,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:31:58,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:31:58,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:31:58,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:31:58,772 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) [2021-07-13 19:31:59,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:31:59,994 INFO L93 Difference]: Finished difference Result 288 states and 593 transitions. [2021-07-13 19:31:59,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:31:59,995 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 [2021-07-13 19:31:59,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:31:59,995 INFO L225 Difference]: With dead ends: 288 [2021-07-13 19:31:59,995 INFO L226 Difference]: Without dead ends: 250 [2021-07-13 19:31:59,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1292.8ms TimeCoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:31:59,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-07-13 19:31:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 193. [2021-07-13 19:31:59,997 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) [2021-07-13 19:31:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 434 transitions. [2021-07-13 19:31:59,997 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 434 transitions. Word has length 18 [2021-07-13 19:31:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:31:59,998 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 434 transitions. [2021-07-13 19:31:59,998 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) [2021-07-13 19:31:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 434 transitions. [2021-07-13 19:31:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:31:59,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:31:59,998 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:00,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-07-13 19:32:00,198 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:00,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:00,199 INFO L82 PathProgramCache]: Analyzing trace with hash 179489888, now seen corresponding path program 230 times [2021-07-13 19:32:00,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:00,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47489817] [2021-07-13 19:32:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:00,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:00,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47489817] [2021-07-13 19:32:00,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47489817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:00,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402430058] [2021-07-13 19:32:00,376 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 [2021-07-13 19:32:00,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:00,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:00,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:32:00,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:00,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402430058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:00,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:00,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:00,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623122290] [2021-07-13 19:32:00,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:00,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:00,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:00,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:00,740 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) [2021-07-13 19:32:00,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:00,924 INFO L93 Difference]: Finished difference Result 213 states and 463 transitions. [2021-07-13 19:32:00,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:32:00,924 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 [2021-07-13 19:32:00,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:00,924 INFO L225 Difference]: With dead ends: 213 [2021-07-13 19:32:00,924 INFO L226 Difference]: Without dead ends: 200 [2021-07-13 19:32:00,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:32:00,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-13 19:32:00,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 194. [2021-07-13 19:32:00,926 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) [2021-07-13 19:32:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 436 transitions. [2021-07-13 19:32:00,926 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 436 transitions. Word has length 18 [2021-07-13 19:32:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:00,927 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 436 transitions. [2021-07-13 19:32:00,927 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) [2021-07-13 19:32:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 436 transitions. [2021-07-13 19:32:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:00,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:00,927 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:01,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1818,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:01,127 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:01,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1397851842, now seen corresponding path program 231 times [2021-07-13 19:32:01,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:01,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484495663] [2021-07-13 19:32:01,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:01,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:01,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484495663] [2021-07-13 19:32:01,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484495663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:01,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696600505] [2021-07-13 19:32:01,355 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 [2021-07-13 19:32:01,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:32:01,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:01,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:32:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:01,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696600505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:01,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:01,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:01,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264216702] [2021-07-13 19:32:01,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:01,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:01,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:01,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:01,740 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) [2021-07-13 19:32:02,116 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-07-13 19:32:02,385 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-07-13 19:32:02,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:02,874 INFO L93 Difference]: Finished difference Result 277 states and 570 transitions. [2021-07-13 19:32:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:32:02,875 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 [2021-07-13 19:32:02,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:02,875 INFO L225 Difference]: With dead ends: 277 [2021-07-13 19:32:02,875 INFO L226 Difference]: Without dead ends: 259 [2021-07-13 19:32:02,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1409.7ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:32:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-07-13 19:32:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 196. [2021-07-13 19:32:02,877 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) [2021-07-13 19:32:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 442 transitions. [2021-07-13 19:32:02,877 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 442 transitions. Word has length 18 [2021-07-13 19:32:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:02,877 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 442 transitions. [2021-07-13 19:32:02,878 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) [2021-07-13 19:32:02,878 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 442 transitions. [2021-07-13 19:32:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:02,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:02,878 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:03,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1829,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:03,078 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash -63260512, now seen corresponding path program 232 times [2021-07-13 19:32:03,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:03,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883924069] [2021-07-13 19:32:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:03,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:03,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883924069] [2021-07-13 19:32:03,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883924069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:03,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221010795] [2021-07-13 19:32:03,240 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 [2021-07-13 19:32:03,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:03,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:03,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:32:03,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:03,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221010795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:03,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:03,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:03,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875166998] [2021-07-13 19:32:03,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:03,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:03,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:03,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:03,583 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) [2021-07-13 19:32:04,306 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-13 19:32:04,509 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-07-13 19:32:04,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:04,652 INFO L93 Difference]: Finished difference Result 271 states and 568 transitions. [2021-07-13 19:32:04,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:32:04,653 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 [2021-07-13 19:32:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:04,653 INFO L225 Difference]: With dead ends: 271 [2021-07-13 19:32:04,653 INFO L226 Difference]: Without dead ends: 252 [2021-07-13 19:32:04,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1207.5ms TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:32:04,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-13 19:32:04,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2021-07-13 19:32:04,655 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) [2021-07-13 19:32:04,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 444 transitions. [2021-07-13 19:32:04,655 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 444 transitions. Word has length 18 [2021-07-13 19:32:04,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:04,655 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 444 transitions. [2021-07-13 19:32:04,655 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) [2021-07-13 19:32:04,656 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 444 transitions. [2021-07-13 19:32:04,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:04,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:04,656 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:04,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1840 [2021-07-13 19:32:04,856 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:04,857 INFO L82 PathProgramCache]: Analyzing trace with hash -684310339, now seen corresponding path program 233 times [2021-07-13 19:32:04,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:04,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272176259] [2021-07-13 19:32:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:32:04,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:04,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272176259] [2021-07-13 19:32:04,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272176259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:04,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113820128] [2021-07-13 19:32:04,941 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 [2021-07-13 19:32:04,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:32:04,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:04,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:32:04,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:32:05,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113820128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:05,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:05,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:32:05,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599974764] [2021-07-13 19:32:05,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:32:05,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:05,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:32:05,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:32:05,085 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) [2021-07-13 19:32:05,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:05,279 INFO L93 Difference]: Finished difference Result 227 states and 502 transitions. [2021-07-13 19:32:05,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:32:05,279 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 [2021-07-13 19:32:05,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:05,280 INFO L225 Difference]: With dead ends: 227 [2021-07-13 19:32:05,280 INFO L226 Difference]: Without dead ends: 227 [2021-07-13 19:32:05,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 242.6ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:05,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-13 19:32:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 196. [2021-07-13 19:32:05,282 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) [2021-07-13 19:32:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 442 transitions. [2021-07-13 19:32:05,282 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 442 transitions. Word has length 18 [2021-07-13 19:32:05,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:05,282 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 442 transitions. [2021-07-13 19:32:05,282 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) [2021-07-13 19:32:05,282 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 442 transitions. [2021-07-13 19:32:05,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:05,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:05,283 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:05,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1850 [2021-07-13 19:32:05,483 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:05,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:05,483 INFO L82 PathProgramCache]: Analyzing trace with hash -891505576, now seen corresponding path program 234 times [2021-07-13 19:32:05,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:05,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733524753] [2021-07-13 19:32:05,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:05,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:05,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733524753] [2021-07-13 19:32:05,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733524753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:05,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884934993] [2021-07-13 19:32:05,679 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 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 [2021-07-13 19:32:05,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:32:05,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:05,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:32:05,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:06,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884934993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:06,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:06,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:06,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173483015] [2021-07-13 19:32:06,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:06,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:06,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:06,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:06,026 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) [2021-07-13 19:32:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:06,607 INFO L93 Difference]: Finished difference Result 249 states and 526 transitions. [2021-07-13 19:32:06,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:32:06,607 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 [2021-07-13 19:32:06,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:06,607 INFO L225 Difference]: With dead ends: 249 [2021-07-13 19:32:06,607 INFO L226 Difference]: Without dead ends: 224 [2021-07-13 19:32:06,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 830.3ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:32:06,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-13 19:32:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 197. [2021-07-13 19:32:06,609 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) [2021-07-13 19:32:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 444 transitions. [2021-07-13 19:32:06,609 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 444 transitions. Word has length 18 [2021-07-13 19:32:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:06,610 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 444 transitions. [2021-07-13 19:32:06,610 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) [2021-07-13 19:32:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 444 transitions. [2021-07-13 19:32:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:06,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:06,610 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:06,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1855 [2021-07-13 19:32:06,811 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:06,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:06,811 INFO L82 PathProgramCache]: Analyzing trace with hash -94769824, now seen corresponding path program 235 times [2021-07-13 19:32:06,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:06,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505231574] [2021-07-13 19:32:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:06,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:06,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505231574] [2021-07-13 19:32:06,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505231574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:06,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990235325] [2021-07-13 19:32:06,972 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 [2021-07-13 19:32:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:32:07,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:07,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990235325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:07,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:07,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:07,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143170084] [2021-07-13 19:32:07,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:07,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:07,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:07,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:07,256 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) [2021-07-13 19:32:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:07,933 INFO L93 Difference]: Finished difference Result 248 states and 531 transitions. [2021-07-13 19:32:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:32:07,933 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 [2021-07-13 19:32:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:07,933 INFO L225 Difference]: With dead ends: 248 [2021-07-13 19:32:07,933 INFO L226 Difference]: Without dead ends: 214 [2021-07-13 19:32:07,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 792.6ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:32:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-13 19:32:07,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 194. [2021-07-13 19:32:07,935 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) [2021-07-13 19:32:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 436 transitions. [2021-07-13 19:32:07,935 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 436 transitions. Word has length 18 [2021-07-13 19:32:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:07,935 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 436 transitions. [2021-07-13 19:32:07,936 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) [2021-07-13 19:32:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 436 transitions. [2021-07-13 19:32:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:07,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:07,936 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:08,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1866,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:08,137 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:08,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:08,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1920326782, now seen corresponding path program 236 times [2021-07-13 19:32:08,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:08,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50985877] [2021-07-13 19:32:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:08,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:08,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50985877] [2021-07-13 19:32:08,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50985877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:08,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095841770] [2021-07-13 19:32:08,363 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 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 [2021-07-13 19:32:08,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:08,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:08,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:32:08,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:08,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095841770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:08,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:08,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:08,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043365737] [2021-07-13 19:32:08,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:08,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:08,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:08,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:08,699 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) [2021-07-13 19:32:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:09,527 INFO L93 Difference]: Finished difference Result 245 states and 524 transitions. [2021-07-13 19:32:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:32:09,528 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 [2021-07-13 19:32:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:09,531 INFO L225 Difference]: With dead ends: 245 [2021-07-13 19:32:09,531 INFO L226 Difference]: Without dead ends: 238 [2021-07-13 19:32:09,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1022.0ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:32:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-13 19:32:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 197. [2021-07-13 19:32:09,533 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) [2021-07-13 19:32:09,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-07-13 19:32:09,533 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-07-13 19:32:09,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:09,534 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-07-13 19:32:09,534 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) [2021-07-13 19:32:09,534 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-07-13 19:32:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:09,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:09,534 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:09,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1876 [2021-07-13 19:32:09,734 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:09,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:09,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1040049184, now seen corresponding path program 237 times [2021-07-13 19:32:09,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:09,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475452306] [2021-07-13 19:32:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:09,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:09,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475452306] [2021-07-13 19:32:09,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475452306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:09,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597061160] [2021-07-13 19:32:09,880 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 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 [2021-07-13 19:32:09,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:32:09,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:09,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:32:09,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:10,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597061160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:10,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:10,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:10,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121292718] [2021-07-13 19:32:10,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:10,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:10,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:10,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:10,220 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) [2021-07-13 19:32:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:10,831 INFO L93 Difference]: Finished difference Result 269 states and 557 transitions. [2021-07-13 19:32:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:32:10,831 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 [2021-07-13 19:32:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:10,832 INFO L225 Difference]: With dead ends: 269 [2021-07-13 19:32:10,832 INFO L226 Difference]: Without dead ends: 250 [2021-07-13 19:32:10,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 778.9ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:32:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-07-13 19:32:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 197. [2021-07-13 19:32:10,834 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) [2021-07-13 19:32:10,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-07-13 19:32:10,834 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-07-13 19:32:10,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:10,834 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-07-13 19:32:10,834 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) [2021-07-13 19:32:10,834 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-07-13 19:32:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:10,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:10,834 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:11,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1889,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:11,035 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:11,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:11,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1577904762, now seen corresponding path program 238 times [2021-07-13 19:32:11,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:11,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382470694] [2021-07-13 19:32:11,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:11,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:11,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382470694] [2021-07-13 19:32:11,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382470694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:11,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505284577] [2021-07-13 19:32:11,192 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 [2021-07-13 19:32:11,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:11,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:11,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:32:11,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:11,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505284577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:11,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:11,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:11,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834538457] [2021-07-13 19:32:11,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:11,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:11,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:11,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:11,474 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) [2021-07-13 19:32:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:12,112 INFO L93 Difference]: Finished difference Result 264 states and 561 transitions. [2021-07-13 19:32:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:32:12,112 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 [2021-07-13 19:32:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:12,112 INFO L225 Difference]: With dead ends: 264 [2021-07-13 19:32:12,112 INFO L226 Difference]: Without dead ends: 245 [2021-07-13 19:32:12,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 742.0ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:32:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-13 19:32:12,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 197. [2021-07-13 19:32:12,114 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) [2021-07-13 19:32:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-07-13 19:32:12,115 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-07-13 19:32:12,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:12,115 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-07-13 19:32:12,115 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) [2021-07-13 19:32:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-07-13 19:32:12,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:12,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:12,115 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:12,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1902,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:12,316 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:12,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:12,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1071558496, now seen corresponding path program 239 times [2021-07-13 19:32:12,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:12,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088733965] [2021-07-13 19:32:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:12,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:12,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088733965] [2021-07-13 19:32:12,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088733965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:12,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99604332] [2021-07-13 19:32:12,463 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 [2021-07-13 19:32:12,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:32:12,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:12,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:32:12,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:12,710 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-07-13 19:32:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:12,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99604332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:12,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:12,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:12,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469228741] [2021-07-13 19:32:12,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:12,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:12,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:12,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:12,891 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) [2021-07-13 19:32:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:13,398 INFO L93 Difference]: Finished difference Result 262 states and 553 transitions. [2021-07-13 19:32:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:32:13,398 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 [2021-07-13 19:32:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:13,398 INFO L225 Difference]: With dead ends: 262 [2021-07-13 19:32:13,398 INFO L226 Difference]: Without dead ends: 237 [2021-07-13 19:32:13,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 749.4ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:32:13,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-13 19:32:13,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 197. [2021-07-13 19:32:13,400 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) [2021-07-13 19:32:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-07-13 19:32:13,401 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-07-13 19:32:13,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:13,401 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-07-13 19:32:13,401 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) [2021-07-13 19:32:13,401 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-07-13 19:32:13,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:13,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:13,401 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:13,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1912 [2021-07-13 19:32:13,602 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:13,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:13,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1107183336, now seen corresponding path program 240 times [2021-07-13 19:32:13,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:13,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477812904] [2021-07-13 19:32:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:13,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:13,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477812904] [2021-07-13 19:32:13,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477812904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:13,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961425882] [2021-07-13 19:32:13,807 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 [2021-07-13 19:32:13,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:32:13,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:13,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:32:13,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:14,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961425882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:14,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:14,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:14,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714228155] [2021-07-13 19:32:14,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:14,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:14,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:14,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:14,157 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) [2021-07-13 19:32:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:15,225 INFO L93 Difference]: Finished difference Result 290 states and 589 transitions. [2021-07-13 19:32:15,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:32:15,225 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 [2021-07-13 19:32:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:15,226 INFO L225 Difference]: With dead ends: 290 [2021-07-13 19:32:15,226 INFO L226 Difference]: Without dead ends: 252 [2021-07-13 19:32:15,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1208.1ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:32:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-13 19:32:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 200. [2021-07-13 19:32:15,228 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) [2021-07-13 19:32:15,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 449 transitions. [2021-07-13 19:32:15,228 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 449 transitions. Word has length 18 [2021-07-13 19:32:15,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:15,228 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 449 transitions. [2021-07-13 19:32:15,228 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) [2021-07-13 19:32:15,228 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 449 transitions. [2021-07-13 19:32:15,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:15,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:15,228 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:15,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1924,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:15,429 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:15,429 INFO L82 PathProgramCache]: Analyzing trace with hash -310447584, now seen corresponding path program 241 times [2021-07-13 19:32:15,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:15,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367918058] [2021-07-13 19:32:15,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:15,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:15,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367918058] [2021-07-13 19:32:15,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367918058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:15,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541336818] [2021-07-13 19:32:15,575 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 [2021-07-13 19:32:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:15,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:32:15,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:15,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541336818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:15,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:15,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:15,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850717230] [2021-07-13 19:32:15,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:15,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:15,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:15,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:15,855 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) [2021-07-13 19:32:16,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:16,612 INFO L93 Difference]: Finished difference Result 244 states and 526 transitions. [2021-07-13 19:32:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:32:16,612 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 [2021-07-13 19:32:16,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:16,612 INFO L225 Difference]: With dead ends: 244 [2021-07-13 19:32:16,612 INFO L226 Difference]: Without dead ends: 219 [2021-07-13 19:32:16,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 808.3ms TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:32:16,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-13 19:32:16,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 200. [2021-07-13 19:32:16,614 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) [2021-07-13 19:32:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 449 transitions. [2021-07-13 19:32:16,614 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 449 transitions. Word has length 18 [2021-07-13 19:32:16,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:16,614 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 449 transitions. [2021-07-13 19:32:16,615 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) [2021-07-13 19:32:16,615 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 449 transitions. [2021-07-13 19:32:16,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:16,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:16,615 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:16,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1935,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:16,815 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:16,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:16,816 INFO L82 PathProgramCache]: Analyzing trace with hash 195898682, now seen corresponding path program 242 times [2021-07-13 19:32:16,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:16,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014498429] [2021-07-13 19:32:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:17,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:17,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014498429] [2021-07-13 19:32:17,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014498429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:17,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729293881] [2021-07-13 19:32:17,004 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 [2021-07-13 19:32:17,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:17,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:17,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:32:17,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:17,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729293881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:17,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:17,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:17,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740815764] [2021-07-13 19:32:17,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:17,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:17,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:17,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:17,405 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) [2021-07-13 19:32:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:18,386 INFO L93 Difference]: Finished difference Result 260 states and 563 transitions. [2021-07-13 19:32:18,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:32:18,386 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 [2021-07-13 19:32:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:18,387 INFO L225 Difference]: With dead ends: 260 [2021-07-13 19:32:18,387 INFO L226 Difference]: Without dead ends: 237 [2021-07-13 19:32:18,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1213.5ms TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:32:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-13 19:32:18,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 205. [2021-07-13 19:32:18,389 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) [2021-07-13 19:32:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 464 transitions. [2021-07-13 19:32:18,389 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 464 transitions. Word has length 18 [2021-07-13 19:32:18,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:18,389 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 464 transitions. [2021-07-13 19:32:18,389 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) [2021-07-13 19:32:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 464 transitions. [2021-07-13 19:32:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:18,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:18,389 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:18,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1945 [2021-07-13 19:32:18,590 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:18,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:18,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1287236256, now seen corresponding path program 243 times [2021-07-13 19:32:18,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:18,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000089588] [2021-07-13 19:32:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:18,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:18,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000089588] [2021-07-13 19:32:18,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000089588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:18,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387001497] [2021-07-13 19:32:18,753 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 [2021-07-13 19:32:18,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:32:18,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:18,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:32:18,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:19,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387001497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:19,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:19,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:32:19,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763289857] [2021-07-13 19:32:19,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:32:19,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:19,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:32:19,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:32:19,235 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) [2021-07-13 19:32:20,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:20,164 INFO L93 Difference]: Finished difference Result 280 states and 598 transitions. [2021-07-13 19:32:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:32:20,164 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 [2021-07-13 19:32:20,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:20,165 INFO L225 Difference]: With dead ends: 280 [2021-07-13 19:32:20,165 INFO L226 Difference]: Without dead ends: 261 [2021-07-13 19:32:20,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1121.8ms TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:32:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-13 19:32:20,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 209. [2021-07-13 19:32:20,167 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) [2021-07-13 19:32:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 472 transitions. [2021-07-13 19:32:20,167 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 472 transitions. Word has length 18 [2021-07-13 19:32:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:20,167 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 472 transitions. [2021-07-13 19:32:20,167 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) [2021-07-13 19:32:20,168 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 472 transitions. [2021-07-13 19:32:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:20,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:20,168 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:20,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1956,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:20,381 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:20,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:20,381 INFO L82 PathProgramCache]: Analyzing trace with hash -682872100, now seen corresponding path program 244 times [2021-07-13 19:32:20,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:20,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468519651] [2021-07-13 19:32:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:20,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:20,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468519651] [2021-07-13 19:32:20,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468519651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:20,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790883834] [2021-07-13 19:32:20,607 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 [2021-07-13 19:32:20,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:20,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:20,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:32:20,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:20,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790883834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:20,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:20,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:20,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383892455] [2021-07-13 19:32:20,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:20,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:20,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:20,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:20,936 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) [2021-07-13 19:32:21,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:21,697 INFO L93 Difference]: Finished difference Result 314 states and 641 transitions. [2021-07-13 19:32:21,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:32:21,698 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 [2021-07-13 19:32:21,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:21,698 INFO L225 Difference]: With dead ends: 314 [2021-07-13 19:32:21,698 INFO L226 Difference]: Without dead ends: 300 [2021-07-13 19:32:21,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 950.7ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:32:21,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-13 19:32:21,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 210. [2021-07-13 19:32:21,700 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) [2021-07-13 19:32:21,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 475 transitions. [2021-07-13 19:32:21,701 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 475 transitions. Word has length 18 [2021-07-13 19:32:21,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:21,701 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 475 transitions. [2021-07-13 19:32:21,701 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) [2021-07-13 19:32:21,701 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 475 transitions. [2021-07-13 19:32:21,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:21,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:21,701 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:21,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1968 [2021-07-13 19:32:21,902 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:21,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:21,902 INFO L82 PathProgramCache]: Analyzing trace with hash 113863652, now seen corresponding path program 245 times [2021-07-13 19:32:21,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:21,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718718913] [2021-07-13 19:32:21,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:22,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:22,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718718913] [2021-07-13 19:32:22,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718718913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:22,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222810767] [2021-07-13 19:32:22,064 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 [2021-07-13 19:32:22,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:32:22,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:22,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:32:22,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:22,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222810767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:22,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:22,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:22,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101549032] [2021-07-13 19:32:22,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:22,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:22,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:22,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:22,458 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) [2021-07-13 19:32:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:22,983 INFO L93 Difference]: Finished difference Result 298 states and 626 transitions. [2021-07-13 19:32:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:32:22,984 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 [2021-07-13 19:32:22,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:22,984 INFO L225 Difference]: With dead ends: 298 [2021-07-13 19:32:22,984 INFO L226 Difference]: Without dead ends: 269 [2021-07-13 19:32:22,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 727.4ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:32:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-07-13 19:32:22,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 212. [2021-07-13 19:32:22,986 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) [2021-07-13 19:32:22,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 479 transitions. [2021-07-13 19:32:22,987 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 479 transitions. Word has length 18 [2021-07-13 19:32:22,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:22,987 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 479 transitions. [2021-07-13 19:32:22,987 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) [2021-07-13 19:32:22,987 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 479 transitions. [2021-07-13 19:32:22,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:22,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:22,987 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:23,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1981,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:23,188 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:23,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:23,188 INFO L82 PathProgramCache]: Analyzing trace with hash 620209918, now seen corresponding path program 246 times [2021-07-13 19:32:23,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:23,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933481617] [2021-07-13 19:32:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:23,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:23,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933481617] [2021-07-13 19:32:23,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933481617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:23,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294049434] [2021-07-13 19:32:23,318 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 [2021-07-13 19:32:23,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:32:23,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:23,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:32:23,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:23,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294049434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:23,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:23,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-13 19:32:23,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492749663] [2021-07-13 19:32:23,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:32:23,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:23,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:32:23,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:32:23,760 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) [2021-07-13 19:32:24,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:24,384 INFO L93 Difference]: Finished difference Result 289 states and 611 transitions. [2021-07-13 19:32:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:32:24,384 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 [2021-07-13 19:32:24,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:24,384 INFO L225 Difference]: With dead ends: 289 [2021-07-13 19:32:24,384 INFO L226 Difference]: Without dead ends: 251 [2021-07-13 19:32:24,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 789.9ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:32:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-13 19:32:24,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 213. [2021-07-13 19:32:24,386 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) [2021-07-13 19:32:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 481 transitions. [2021-07-13 19:32:24,387 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 481 transitions. Word has length 18 [2021-07-13 19:32:24,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:24,387 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 481 transitions. [2021-07-13 19:32:24,387 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) [2021-07-13 19:32:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 481 transitions. [2021-07-13 19:32:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:24,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:24,387 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:24,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1993 [2021-07-13 19:32:24,588 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:24,588 INFO L82 PathProgramCache]: Analyzing trace with hash -862925020, now seen corresponding path program 247 times [2021-07-13 19:32:24,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:24,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602790477] [2021-07-13 19:32:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:24,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:24,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602790477] [2021-07-13 19:32:24,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602790477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:24,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518624768] [2021-07-13 19:32:24,806 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 [2021-07-13 19:32:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:24,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:32:24,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:25,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518624768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:25,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:25,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:32:25,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654003901] [2021-07-13 19:32:25,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:32:25,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:25,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:32:25,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:32:25,153 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) [2021-07-13 19:32:25,702 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-07-13 19:32:26,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:26,385 INFO L93 Difference]: Finished difference Result 327 states and 687 transitions. [2021-07-13 19:32:26,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:32:26,385 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 [2021-07-13 19:32:26,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:26,385 INFO L225 Difference]: With dead ends: 327 [2021-07-13 19:32:26,385 INFO L226 Difference]: Without dead ends: 308 [2021-07-13 19:32:26,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1353.7ms TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:32:26,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-07-13 19:32:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 213. [2021-07-13 19:32:26,388 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) [2021-07-13 19:32:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 481 transitions. [2021-07-13 19:32:26,388 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 481 transitions. Word has length 18 [2021-07-13 19:32:26,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:26,388 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 481 transitions. [2021-07-13 19:32:26,388 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) [2021-07-13 19:32:26,388 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 481 transitions. [2021-07-13 19:32:26,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:32:26,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:26,389 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:26,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2005,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:26,589 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:26,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:26,589 INFO L82 PathProgramCache]: Analyzing trace with hash -17953568, now seen corresponding path program 248 times [2021-07-13 19:32:26,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:26,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922045078] [2021-07-13 19:32:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:26,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:26,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922045078] [2021-07-13 19:32:26,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922045078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:26,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226484691] [2021-07-13 19:32:26,738 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 [2021-07-13 19:32:26,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:26,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:26,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:32:26,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:27,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226484691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:27,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:27,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 19:32:27,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504776128] [2021-07-13 19:32:27,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:32:27,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:27,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:32:27,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:32:27,106 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) [2021-07-13 19:32:27,787 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-07-13 19:32:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:28,614 INFO L93 Difference]: Finished difference Result 333 states and 693 transitions. [2021-07-13 19:32:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:32:28,615 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 [2021-07-13 19:32:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:28,615 INFO L225 Difference]: With dead ends: 333 [2021-07-13 19:32:28,615 INFO L226 Difference]: Without dead ends: 300 [2021-07-13 19:32:28,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1543.0ms TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:32:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-13 19:32:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 215. [2021-07-13 19:32:28,617 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) [2021-07-13 19:32:28,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 485 transitions. [2021-07-13 19:32:28,618 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 485 transitions. Word has length 18 [2021-07-13 19:32:28,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:28,618 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 485 transitions. [2021-07-13 19:32:28,618 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) [2021-07-13 19:32:28,618 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 485 transitions. [2021-07-13 19:32:28,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:28,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:28,618 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:28,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2015 [2021-07-13 19:32:28,823 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:28,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:28,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1401880791, now seen corresponding path program 249 times [2021-07-13 19:32:28,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:28,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635980021] [2021-07-13 19:32:28,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:28,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:28,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635980021] [2021-07-13 19:32:28,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635980021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:28,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26865735] [2021-07-13 19:32:28,935 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 [2021-07-13 19:32:28,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:32:28,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:28,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:32:28,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:29,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26865735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:29,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:29,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:29,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806337410] [2021-07-13 19:32:29,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:29,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:29,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:29,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:29,173 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) [2021-07-13 19:32:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:29,441 INFO L93 Difference]: Finished difference Result 278 states and 600 transitions. [2021-07-13 19:32:29,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:32:29,443 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 [2021-07-13 19:32:29,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:29,443 INFO L225 Difference]: With dead ends: 278 [2021-07-13 19:32:29,443 INFO L226 Difference]: Without dead ends: 278 [2021-07-13 19:32:29,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:32:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-07-13 19:32:29,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 218. [2021-07-13 19:32:29,445 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) [2021-07-13 19:32:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-07-13 19:32:29,446 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-07-13 19:32:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:29,446 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-07-13 19:32:29,446 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) [2021-07-13 19:32:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-07-13 19:32:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:29,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:29,446 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:29,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2025 [2021-07-13 19:32:29,662 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:29,663 INFO L82 PathProgramCache]: Analyzing trace with hash 357408349, now seen corresponding path program 250 times [2021-07-13 19:32:29,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:29,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13967178] [2021-07-13 19:32:29,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:29,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:29,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13967178] [2021-07-13 19:32:29,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13967178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:29,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521065566] [2021-07-13 19:32:29,757 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 [2021-07-13 19:32:29,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:29,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:29,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:29,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:29,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521065566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:29,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:29,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:29,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299618877] [2021-07-13 19:32:29,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:29,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:29,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:29,957 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) [2021-07-13 19:32:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:30,430 INFO L93 Difference]: Finished difference Result 289 states and 622 transitions. [2021-07-13 19:32:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:32:30,431 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 [2021-07-13 19:32:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:30,431 INFO L225 Difference]: With dead ends: 289 [2021-07-13 19:32:30,431 INFO L226 Difference]: Without dead ends: 289 [2021-07-13 19:32:30,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 516.0ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:32:30,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-07-13 19:32:30,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 218. [2021-07-13 19:32:30,433 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) [2021-07-13 19:32:30,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-07-13 19:32:30,434 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-07-13 19:32:30,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:30,434 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-07-13 19:32:30,434 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) [2021-07-13 19:32:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-07-13 19:32:30,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:30,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:30,434 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:30,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2029 [2021-07-13 19:32:30,635 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:30,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:30,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1516287333, now seen corresponding path program 251 times [2021-07-13 19:32:30,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:30,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615119414] [2021-07-13 19:32:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:30,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:30,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615119414] [2021-07-13 19:32:30,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615119414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:30,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784407886] [2021-07-13 19:32:30,726 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 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 [2021-07-13 19:32:30,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:32:30,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:30,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:30,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:30,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784407886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:30,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:30,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:30,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63533280] [2021-07-13 19:32:30,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:30,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:30,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:30,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:30,941 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) [2021-07-13 19:32:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:31,499 INFO L93 Difference]: Finished difference Result 286 states and 616 transitions. [2021-07-13 19:32:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:32:31,499 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 [2021-07-13 19:32:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:31,499 INFO L225 Difference]: With dead ends: 286 [2021-07-13 19:32:31,499 INFO L226 Difference]: Without dead ends: 286 [2021-07-13 19:32:31,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 597.5ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:32:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-13 19:32:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 218. [2021-07-13 19:32:31,502 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) [2021-07-13 19:32:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-07-13 19:32:31,502 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-07-13 19:32:31,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:31,502 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-07-13 19:32:31,502 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) [2021-07-13 19:32:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-07-13 19:32:31,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:31,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:31,503 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:31,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2034 [2021-07-13 19:32:31,703 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:31,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:31,703 INFO L82 PathProgramCache]: Analyzing trace with hash 445291869, now seen corresponding path program 252 times [2021-07-13 19:32:31,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:31,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272220051] [2021-07-13 19:32:31,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:31,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:31,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272220051] [2021-07-13 19:32:31,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272220051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:31,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228359559] [2021-07-13 19:32:31,797 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 [2021-07-13 19:32:31,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:32:31,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:31,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:31,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:32,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228359559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:32,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:32,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:32,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547216539] [2021-07-13 19:32:32,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:32,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:32,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:32,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:32,034 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) [2021-07-13 19:32:32,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:32,619 INFO L93 Difference]: Finished difference Result 284 states and 612 transitions. [2021-07-13 19:32:32,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:32:32,619 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 [2021-07-13 19:32:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:32,620 INFO L225 Difference]: With dead ends: 284 [2021-07-13 19:32:32,620 INFO L226 Difference]: Without dead ends: 284 [2021-07-13 19:32:32,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 622.1ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:32:32,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-07-13 19:32:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 219. [2021-07-13 19:32:32,622 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) [2021-07-13 19:32:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 493 transitions. [2021-07-13 19:32:32,622 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 493 transitions. Word has length 19 [2021-07-13 19:32:32,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:32,623 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 493 transitions. [2021-07-13 19:32:32,623 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) [2021-07-13 19:32:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 493 transitions. [2021-07-13 19:32:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:32,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:32,623 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:32,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2039 [2021-07-13 19:32:32,823 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:32,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:32,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1242027621, now seen corresponding path program 253 times [2021-07-13 19:32:32,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:32,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558637379] [2021-07-13 19:32:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:32,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:32,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558637379] [2021-07-13 19:32:32,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558637379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:32,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792630181] [2021-07-13 19:32:32,924 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 [2021-07-13 19:32:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:32,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:32,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:33,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792630181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:33,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:33,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:33,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551603583] [2021-07-13 19:32:33,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:33,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:33,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:33,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:33,151 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) [2021-07-13 19:32:33,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:33,843 INFO L93 Difference]: Finished difference Result 285 states and 611 transitions. [2021-07-13 19:32:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:32:33,843 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 [2021-07-13 19:32:33,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:33,844 INFO L225 Difference]: With dead ends: 285 [2021-07-13 19:32:33,844 INFO L226 Difference]: Without dead ends: 282 [2021-07-13 19:32:33,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 698.5ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:32:33,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-07-13 19:32:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 220. [2021-07-13 19:32:33,846 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) [2021-07-13 19:32:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-13 19:32:33,846 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-13 19:32:33,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:33,846 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-13 19:32:33,846 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) [2021-07-13 19:32:33,846 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-13 19:32:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:33,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:33,847 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:34,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2044,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:34,047 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:34,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1925543582, now seen corresponding path program 254 times [2021-07-13 19:32:34,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:34,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166849262] [2021-07-13 19:32:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:34,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:34,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166849262] [2021-07-13 19:32:34,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166849262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:34,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412745663] [2021-07-13 19:32:34,143 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 [2021-07-13 19:32:34,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:34,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:34,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:34,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:34,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412745663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:34,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:34,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:34,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133758595] [2021-07-13 19:32:34,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:34,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:34,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:34,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:34,422 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) [2021-07-13 19:32:34,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:34,909 INFO L93 Difference]: Finished difference Result 267 states and 578 transitions. [2021-07-13 19:32:34,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:32:34,909 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 [2021-07-13 19:32:34,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:34,909 INFO L225 Difference]: With dead ends: 267 [2021-07-13 19:32:34,910 INFO L226 Difference]: Without dead ends: 267 [2021-07-13 19:32:34,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 628.2ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:32:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-07-13 19:32:34,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 220. [2021-07-13 19:32:34,912 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) [2021-07-13 19:32:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-13 19:32:34,912 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-13 19:32:34,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:34,912 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-13 19:32:34,912 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) [2021-07-13 19:32:34,912 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-13 19:32:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:34,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:34,913 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:35,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:35,113 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1418186439, now seen corresponding path program 255 times [2021-07-13 19:32:35,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:35,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841534983] [2021-07-13 19:32:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:35,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:35,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841534983] [2021-07-13 19:32:35,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841534983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:35,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815297922] [2021-07-13 19:32:35,199 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 [2021-07-13 19:32:35,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:32:35,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:35,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:32:35,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:35,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815297922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:35,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:35,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:35,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493809111] [2021-07-13 19:32:35,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:35,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:35,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:35,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:35,404 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) [2021-07-13 19:32:35,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:35,743 INFO L93 Difference]: Finished difference Result 252 states and 555 transitions. [2021-07-13 19:32:35,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:32:35,743 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 [2021-07-13 19:32:35,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:35,744 INFO L225 Difference]: With dead ends: 252 [2021-07-13 19:32:35,744 INFO L226 Difference]: Without dead ends: 252 [2021-07-13 19:32:35,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:32:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-13 19:32:35,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 220. [2021-07-13 19:32:35,746 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) [2021-07-13 19:32:35,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-13 19:32:35,746 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-13 19:32:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:35,746 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-13 19:32:35,746 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) [2021-07-13 19:32:35,746 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-13 19:32:35,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:35,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:35,747 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:35,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2059,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:35,947 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:35,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:35,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1717901873, now seen corresponding path program 256 times [2021-07-13 19:32:35,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:35,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137689354] [2021-07-13 19:32:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:36,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:36,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137689354] [2021-07-13 19:32:36,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137689354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:36,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493706626] [2021-07-13 19:32:36,038 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 [2021-07-13 19:32:36,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:36,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:36,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:36,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:36,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493706626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:36,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:36,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:36,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627497231] [2021-07-13 19:32:36,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:36,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:36,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:36,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:36,255 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) [2021-07-13 19:32:36,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:36,593 INFO L93 Difference]: Finished difference Result 264 states and 579 transitions. [2021-07-13 19:32:36,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:32:36,594 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 [2021-07-13 19:32:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:36,594 INFO L225 Difference]: With dead ends: 264 [2021-07-13 19:32:36,594 INFO L226 Difference]: Without dead ends: 264 [2021-07-13 19:32:36,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 387.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:32:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-13 19:32:36,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 220. [2021-07-13 19:32:36,596 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) [2021-07-13 19:32:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-13 19:32:36,597 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-13 19:32:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:36,597 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-13 19:32:36,597 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) [2021-07-13 19:32:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-13 19:32:36,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:36,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:36,597 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:36,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2064 [2021-07-13 19:32:36,801 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:36,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:36,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1506069959, now seen corresponding path program 257 times [2021-07-13 19:32:36,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:36,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931860679] [2021-07-13 19:32:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:36,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:36,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931860679] [2021-07-13 19:32:36,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931860679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:36,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889883712] [2021-07-13 19:32:36,894 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 [2021-07-13 19:32:36,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:32:36,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:36,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:36,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:37,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889883712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:37,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:37,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:37,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7858361] [2021-07-13 19:32:37,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:37,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:37,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:37,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:37,118 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) [2021-07-13 19:32:37,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:37,475 INFO L93 Difference]: Finished difference Result 261 states and 573 transitions. [2021-07-13 19:32:37,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:32:37,475 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 [2021-07-13 19:32:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:37,476 INFO L225 Difference]: With dead ends: 261 [2021-07-13 19:32:37,476 INFO L226 Difference]: Without dead ends: 261 [2021-07-13 19:32:37,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 394.2ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:32:37,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-13 19:32:37,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 220. [2021-07-13 19:32:37,478 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) [2021-07-13 19:32:37,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-13 19:32:37,478 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-13 19:32:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:37,478 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-13 19:32:37,478 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) [2021-07-13 19:32:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-13 19:32:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:37,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:37,479 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:37,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2069 [2021-07-13 19:32:37,684 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:37,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:37,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1992161585, now seen corresponding path program 258 times [2021-07-13 19:32:37,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:37,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887199135] [2021-07-13 19:32:37,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:37,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:37,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887199135] [2021-07-13 19:32:37,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887199135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:37,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628480957] [2021-07-13 19:32:37,771 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 [2021-07-13 19:32:37,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:32:37,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:37,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:38,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628480957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:38,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:38,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:38,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853852338] [2021-07-13 19:32:38,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:38,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:38,005 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) [2021-07-13 19:32:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:38,337 INFO L93 Difference]: Finished difference Result 258 states and 567 transitions. [2021-07-13 19:32:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:32:38,337 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 [2021-07-13 19:32:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:38,338 INFO L225 Difference]: With dead ends: 258 [2021-07-13 19:32:38,338 INFO L226 Difference]: Without dead ends: 258 [2021-07-13 19:32:38,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 409.2ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:32:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-13 19:32:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 220. [2021-07-13 19:32:38,340 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) [2021-07-13 19:32:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-13 19:32:38,340 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-13 19:32:38,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:38,340 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-13 19:32:38,340 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) [2021-07-13 19:32:38,340 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-13 19:32:38,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:38,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:38,341 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:38,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2074,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:38,541 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:38,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:38,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1704611350, now seen corresponding path program 259 times [2021-07-13 19:32:38,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:38,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787490484] [2021-07-13 19:32:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:38,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:38,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787490484] [2021-07-13 19:32:38,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787490484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:38,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073649100] [2021-07-13 19:32:38,635 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 [2021-07-13 19:32:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:38,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:38,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:38,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073649100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:38,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:38,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:38,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558709807] [2021-07-13 19:32:38,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:38,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:38,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:38,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:38,903 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) [2021-07-13 19:32:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:39,134 INFO L93 Difference]: Finished difference Result 243 states and 539 transitions. [2021-07-13 19:32:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:32:39,134 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 [2021-07-13 19:32:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:39,135 INFO L225 Difference]: With dead ends: 243 [2021-07-13 19:32:39,135 INFO L226 Difference]: Without dead ends: 243 [2021-07-13 19:32:39,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 374.1ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:32:39,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-13 19:32:39,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2021-07-13 19:32:39,137 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) [2021-07-13 19:32:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-07-13 19:32:39,137 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-07-13 19:32:39,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:39,137 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-07-13 19:32:39,137 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) [2021-07-13 19:32:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-07-13 19:32:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:39,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:39,137 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:39,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2081,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:39,338 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:39,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:39,338 INFO L82 PathProgramCache]: Analyzing trace with hash -450444695, now seen corresponding path program 260 times [2021-07-13 19:32:39,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:39,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625239122] [2021-07-13 19:32:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:39,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:39,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625239122] [2021-07-13 19:32:39,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625239122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:39,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417519652] [2021-07-13 19:32:39,433 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 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 [2021-07-13 19:32:39,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:39,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:39,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:39,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:39,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417519652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:39,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:39,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:39,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376356787] [2021-07-13 19:32:39,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:39,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:39,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:39,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:39,630 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) [2021-07-13 19:32:39,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:39,841 INFO L93 Difference]: Finished difference Result 254 states and 557 transitions. [2021-07-13 19:32:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:32:39,842 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 [2021-07-13 19:32:39,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:39,842 INFO L225 Difference]: With dead ends: 254 [2021-07-13 19:32:39,842 INFO L226 Difference]: Without dead ends: 254 [2021-07-13 19:32:39,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 253.9ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:32:39,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-13 19:32:39,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2021-07-13 19:32:39,844 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) [2021-07-13 19:32:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-07-13 19:32:39,845 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-07-13 19:32:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:39,845 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-07-13 19:32:39,845 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) [2021-07-13 19:32:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-07-13 19:32:39,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:39,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:39,845 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:40,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2089 [2021-07-13 19:32:40,046 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:40,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:40,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1521440159, now seen corresponding path program 261 times [2021-07-13 19:32:40,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:40,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877364028] [2021-07-13 19:32:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:40,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:40,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877364028] [2021-07-13 19:32:40,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877364028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:40,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499868047] [2021-07-13 19:32:40,135 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 [2021-07-13 19:32:40,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:32:40,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:40,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:40,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:40,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499868047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:40,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:40,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:40,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750353765] [2021-07-13 19:32:40,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:40,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:40,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:40,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:40,352 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) [2021-07-13 19:32:40,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:40,792 INFO L93 Difference]: Finished difference Result 266 states and 581 transitions. [2021-07-13 19:32:40,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:32:40,792 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 [2021-07-13 19:32:40,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:40,792 INFO L225 Difference]: With dead ends: 266 [2021-07-13 19:32:40,792 INFO L226 Difference]: Without dead ends: 266 [2021-07-13 19:32:40,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 441.0ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:32:40,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-07-13 19:32:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 219. [2021-07-13 19:32:40,795 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) [2021-07-13 19:32:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 493 transitions. [2021-07-13 19:32:40,795 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 493 transitions. Word has length 19 [2021-07-13 19:32:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:40,795 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 493 transitions. [2021-07-13 19:32:40,795 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) [2021-07-13 19:32:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 493 transitions. [2021-07-13 19:32:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:40,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:40,796 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:40,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2094,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:40,996 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:40,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:40,997 INFO L82 PathProgramCache]: Analyzing trace with hash -724704407, now seen corresponding path program 262 times [2021-07-13 19:32:40,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:40,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409249995] [2021-07-13 19:32:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:41,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:41,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409249995] [2021-07-13 19:32:41,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409249995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:41,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184001735] [2021-07-13 19:32:41,090 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 [2021-07-13 19:32:41,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:41,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:41,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:41,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:41,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184001735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:41,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:41,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:41,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032372806] [2021-07-13 19:32:41,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:41,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:41,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:41,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:41,298 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) [2021-07-13 19:32:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:41,551 INFO L93 Difference]: Finished difference Result 260 states and 571 transitions. [2021-07-13 19:32:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:32:41,551 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 [2021-07-13 19:32:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:41,551 INFO L225 Difference]: With dead ends: 260 [2021-07-13 19:32:41,551 INFO L226 Difference]: Without dead ends: 260 [2021-07-13 19:32:41,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:32:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-13 19:32:41,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 221. [2021-07-13 19:32:41,553 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) [2021-07-13 19:32:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 497 transitions. [2021-07-13 19:32:41,554 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 497 transitions. Word has length 19 [2021-07-13 19:32:41,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:41,554 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 497 transitions. [2021-07-13 19:32:41,554 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) [2021-07-13 19:32:41,554 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 497 transitions. [2021-07-13 19:32:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:41,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:41,554 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:41,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2099,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:41,755 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:41,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:41,755 INFO L82 PathProgramCache]: Analyzing trace with hash -437154172, now seen corresponding path program 263 times [2021-07-13 19:32:41,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:41,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891798441] [2021-07-13 19:32:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:41,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:41,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891798441] [2021-07-13 19:32:41,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891798441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:41,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313672661] [2021-07-13 19:32:41,843 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 [2021-07-13 19:32:41,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:32:41,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:41,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:41,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:42,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313672661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:42,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:42,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:42,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334932635] [2021-07-13 19:32:42,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:42,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:42,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:42,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:42,085 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) [2021-07-13 19:32:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:42,394 INFO L93 Difference]: Finished difference Result 252 states and 556 transitions. [2021-07-13 19:32:42,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:32:42,394 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 [2021-07-13 19:32:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:42,394 INFO L225 Difference]: With dead ends: 252 [2021-07-13 19:32:42,394 INFO L226 Difference]: Without dead ends: 252 [2021-07-13 19:32:42,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 366.7ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:32:42,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-13 19:32:42,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 217. [2021-07-13 19:32:42,396 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) [2021-07-13 19:32:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-07-13 19:32:42,397 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-07-13 19:32:42,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:42,397 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-07-13 19:32:42,397 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) [2021-07-13 19:32:42,397 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-07-13 19:32:42,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:42,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:42,397 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:42,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2106 [2021-07-13 19:32:42,598 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:42,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:42,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1290392199, now seen corresponding path program 264 times [2021-07-13 19:32:42,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:42,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294712349] [2021-07-13 19:32:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:42,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:42,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294712349] [2021-07-13 19:32:42,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294712349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:42,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958051707] [2021-07-13 19:32:42,710 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 [2021-07-13 19:32:42,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:32:42,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:42,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:42,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:42,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958051707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:42,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:42,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:42,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687414223] [2021-07-13 19:32:42,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:42,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:42,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:42,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:42,906 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) [2021-07-13 19:32:43,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:43,221 INFO L93 Difference]: Finished difference Result 255 states and 559 transitions. [2021-07-13 19:32:43,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:32:43,222 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 [2021-07-13 19:32:43,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:43,222 INFO L225 Difference]: With dead ends: 255 [2021-07-13 19:32:43,222 INFO L226 Difference]: Without dead ends: 255 [2021-07-13 19:32:43,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:32:43,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-13 19:32:43,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 219. [2021-07-13 19:32:43,224 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) [2021-07-13 19:32:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 491 transitions. [2021-07-13 19:32:43,225 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 491 transitions. Word has length 19 [2021-07-13 19:32:43,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:43,225 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 491 transitions. [2021-07-13 19:32:43,225 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) [2021-07-13 19:32:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 491 transitions. [2021-07-13 19:32:43,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:43,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:43,225 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:43,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2114 [2021-07-13 19:32:43,426 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:43,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:43,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2087127951, now seen corresponding path program 265 times [2021-07-13 19:32:43,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:43,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573174377] [2021-07-13 19:32:43,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:43,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:43,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573174377] [2021-07-13 19:32:43,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573174377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:43,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109160723] [2021-07-13 19:32:43,535 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 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 [2021-07-13 19:32:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:43,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:43,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:43,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109160723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:43,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:43,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:43,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761968424] [2021-07-13 19:32:43,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:43,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:43,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:43,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:43,731 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) [2021-07-13 19:32:44,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:44,068 INFO L93 Difference]: Finished difference Result 261 states and 571 transitions. [2021-07-13 19:32:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:32:44,069 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 [2021-07-13 19:32:44,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:44,069 INFO L225 Difference]: With dead ends: 261 [2021-07-13 19:32:44,069 INFO L226 Difference]: Without dead ends: 261 [2021-07-13 19:32:44,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 348.0ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:32:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-13 19:32:44,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 220. [2021-07-13 19:32:44,071 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) [2021-07-13 19:32:44,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 493 transitions. [2021-07-13 19:32:44,072 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 493 transitions. Word has length 19 [2021-07-13 19:32:44,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:44,072 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 493 transitions. [2021-07-13 19:32:44,072 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) [2021-07-13 19:32:44,072 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 493 transitions. [2021-07-13 19:32:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:44,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:44,072 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:44,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2119 [2021-07-13 19:32:44,288 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:44,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:44,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1920289110, now seen corresponding path program 266 times [2021-07-13 19:32:44,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:44,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749957613] [2021-07-13 19:32:44,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:44,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:44,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749957613] [2021-07-13 19:32:44,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749957613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:44,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767529431] [2021-07-13 19:32:44,395 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 [2021-07-13 19:32:44,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:44,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:44,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:44,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:44,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767529431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:44,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:44,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:44,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578324184] [2021-07-13 19:32:44,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:44,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:44,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:44,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:44,625 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) [2021-07-13 19:32:44,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:44,987 INFO L93 Difference]: Finished difference Result 256 states and 561 transitions. [2021-07-13 19:32:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:32:44,988 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 [2021-07-13 19:32:44,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:44,988 INFO L225 Difference]: With dead ends: 256 [2021-07-13 19:32:44,988 INFO L226 Difference]: Without dead ends: 256 [2021-07-13 19:32:44,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 452.9ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:32:44,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-07-13 19:32:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 218. [2021-07-13 19:32:44,990 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) [2021-07-13 19:32:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 489 transitions. [2021-07-13 19:32:44,991 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 489 transitions. Word has length 19 [2021-07-13 19:32:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:44,991 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 489 transitions. [2021-07-13 19:32:44,991 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) [2021-07-13 19:32:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 489 transitions. [2021-07-13 19:32:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:44,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:44,991 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:45,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2126,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:45,202 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:45,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:45,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1701493079, now seen corresponding path program 267 times [2021-07-13 19:32:45,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:45,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771785077] [2021-07-13 19:32:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:45,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:45,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771785077] [2021-07-13 19:32:45,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771785077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:45,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106153599] [2021-07-13 19:32:45,319 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 [2021-07-13 19:32:45,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:32:45,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:45,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:45,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:45,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106153599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:45,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:45,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:45,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530693632] [2021-07-13 19:32:45,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:45,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:45,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:45,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:45,576 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) [2021-07-13 19:32:46,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:46,170 INFO L93 Difference]: Finished difference Result 285 states and 602 transitions. [2021-07-13 19:32:46,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:32:46,170 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 [2021-07-13 19:32:46,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:46,171 INFO L225 Difference]: With dead ends: 285 [2021-07-13 19:32:46,171 INFO L226 Difference]: Without dead ends: 285 [2021-07-13 19:32:46,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 698.8ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:32:46,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-07-13 19:32:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2021-07-13 19:32:46,173 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) [2021-07-13 19:32:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 514 transitions. [2021-07-13 19:32:46,173 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 514 transitions. Word has length 19 [2021-07-13 19:32:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:46,173 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 514 transitions. [2021-07-13 19:32:46,173 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) [2021-07-13 19:32:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 514 transitions. [2021-07-13 19:32:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:46,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:46,174 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:46,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2134 [2021-07-13 19:32:46,374 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:46,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:46,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1413942844, now seen corresponding path program 268 times [2021-07-13 19:32:46,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:46,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726452347] [2021-07-13 19:32:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:46,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:46,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726452347] [2021-07-13 19:32:46,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726452347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:46,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701187597] [2021-07-13 19:32:46,485 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 [2021-07-13 19:32:46,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:46,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:46,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:46,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:46,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701187597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:46,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:46,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:46,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765246312] [2021-07-13 19:32:46,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:46,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:46,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:46,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:46,678 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) [2021-07-13 19:32:47,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:47,242 INFO L93 Difference]: Finished difference Result 337 states and 704 transitions. [2021-07-13 19:32:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:32:47,242 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 [2021-07-13 19:32:47,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:47,243 INFO L225 Difference]: With dead ends: 337 [2021-07-13 19:32:47,243 INFO L226 Difference]: Without dead ends: 337 [2021-07-13 19:32:47,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 531.9ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:32:47,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-13 19:32:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 232. [2021-07-13 19:32:47,245 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) [2021-07-13 19:32:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 519 transitions. [2021-07-13 19:32:47,246 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 519 transitions. Word has length 19 [2021-07-13 19:32:47,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:47,246 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 519 transitions. [2021-07-13 19:32:47,246 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) [2021-07-13 19:32:47,246 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 519 transitions. [2021-07-13 19:32:47,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:47,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:47,246 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:47,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2142,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:47,447 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:47,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:47,447 INFO L82 PathProgramCache]: Analyzing trace with hash 920989127, now seen corresponding path program 269 times [2021-07-13 19:32:47,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:47,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756316424] [2021-07-13 19:32:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:47,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:47,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756316424] [2021-07-13 19:32:47,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756316424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:47,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86202598] [2021-07-13 19:32:47,557 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 [2021-07-13 19:32:47,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:32:47,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:47,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:47,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:47,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86202598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:47,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:47,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:47,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222085573] [2021-07-13 19:32:47,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:47,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:47,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:47,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:47,819 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) [2021-07-13 19:32:48,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:48,110 INFO L93 Difference]: Finished difference Result 253 states and 555 transitions. [2021-07-13 19:32:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:32:48,110 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 [2021-07-13 19:32:48,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:48,110 INFO L225 Difference]: With dead ends: 253 [2021-07-13 19:32:48,110 INFO L226 Difference]: Without dead ends: 247 [2021-07-13 19:32:48,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:32:48,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-13 19:32:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 223. [2021-07-13 19:32:48,112 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) [2021-07-13 19:32:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 503 transitions. [2021-07-13 19:32:48,113 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 503 transitions. Word has length 19 [2021-07-13 19:32:48,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:48,113 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 503 transitions. [2021-07-13 19:32:48,113 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) [2021-07-13 19:32:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 503 transitions. [2021-07-13 19:32:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:48,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:48,113 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:48,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2149,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:48,314 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:48,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1111952564, now seen corresponding path program 270 times [2021-07-13 19:32:48,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:48,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923123722] [2021-07-13 19:32:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:48,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:48,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923123722] [2021-07-13 19:32:48,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923123722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:48,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108339689] [2021-07-13 19:32:48,435 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 [2021-07-13 19:32:48,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:32:48,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:48,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:48,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:48,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108339689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:48,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:48,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:48,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65728248] [2021-07-13 19:32:48,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:48,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:48,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:48,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:48,651 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) [2021-07-13 19:32:49,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:49,061 INFO L93 Difference]: Finished difference Result 279 states and 607 transitions. [2021-07-13 19:32:49,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:32:49,061 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 [2021-07-13 19:32:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:49,061 INFO L225 Difference]: With dead ends: 279 [2021-07-13 19:32:49,061 INFO L226 Difference]: Without dead ends: 279 [2021-07-13 19:32:49,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 426.1ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:32:49,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-07-13 19:32:49,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 221. [2021-07-13 19:32:49,063 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) [2021-07-13 19:32:49,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 496 transitions. [2021-07-13 19:32:49,064 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 496 transitions. Word has length 19 [2021-07-13 19:32:49,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:49,064 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 496 transitions. [2021-07-13 19:32:49,064 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) [2021-07-13 19:32:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 496 transitions. [2021-07-13 19:32:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:49,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:49,064 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:49,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2157 [2021-07-13 19:32:49,265 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:49,265 INFO L82 PathProgramCache]: Analyzing trace with hash -57431139, now seen corresponding path program 271 times [2021-07-13 19:32:49,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:49,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219352023] [2021-07-13 19:32:49,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:49,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:49,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219352023] [2021-07-13 19:32:49,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219352023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:49,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100978179] [2021-07-13 19:32:49,371 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 [2021-07-13 19:32:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:49,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:49,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:49,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100978179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:49,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:49,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:49,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953852788] [2021-07-13 19:32:49,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:49,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:49,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:49,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:49,571 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) [2021-07-13 19:32:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:49,862 INFO L93 Difference]: Finished difference Result 247 states and 546 transitions. [2021-07-13 19:32:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:32:49,863 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 [2021-07-13 19:32:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:49,863 INFO L225 Difference]: With dead ends: 247 [2021-07-13 19:32:49,863 INFO L226 Difference]: Without dead ends: 247 [2021-07-13 19:32:49,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:32:49,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-13 19:32:49,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-07-13 19:32:49,865 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) [2021-07-13 19:32:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 498 transitions. [2021-07-13 19:32:49,865 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 498 transitions. Word has length 19 [2021-07-13 19:32:49,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:49,865 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 498 transitions. [2021-07-13 19:32:49,866 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) [2021-07-13 19:32:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 498 transitions. [2021-07-13 19:32:49,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:49,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:49,866 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:50,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2162,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:50,066 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:50,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:50,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1101447845, now seen corresponding path program 272 times [2021-07-13 19:32:50,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:50,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275597455] [2021-07-13 19:32:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:50,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:50,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275597455] [2021-07-13 19:32:50,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275597455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:50,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108740155] [2021-07-13 19:32:50,157 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 [2021-07-13 19:32:50,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:50,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:50,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:32:50,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:50,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108740155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:50,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:50,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:50,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976925595] [2021-07-13 19:32:50,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:50,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:50,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:50,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:50,449 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) [2021-07-13 19:32:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:51,054 INFO L93 Difference]: Finished difference Result 261 states and 574 transitions. [2021-07-13 19:32:51,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:32:51,054 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 [2021-07-13 19:32:51,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:51,054 INFO L225 Difference]: With dead ends: 261 [2021-07-13 19:32:51,054 INFO L226 Difference]: Without dead ends: 261 [2021-07-13 19:32:51,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 725.6ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:32:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-13 19:32:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 223. [2021-07-13 19:32:51,056 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) [2021-07-13 19:32:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 500 transitions. [2021-07-13 19:32:51,057 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 500 transitions. Word has length 19 [2021-07-13 19:32:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:51,057 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 500 transitions. [2021-07-13 19:32:51,057 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) [2021-07-13 19:32:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 500 transitions. [2021-07-13 19:32:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:51,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:51,057 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:51,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2167 [2021-07-13 19:32:51,258 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:51,258 INFO L82 PathProgramCache]: Analyzing trace with hash 30452381, now seen corresponding path program 273 times [2021-07-13 19:32:51,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:51,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009051413] [2021-07-13 19:32:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:51,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:51,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009051413] [2021-07-13 19:32:51,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009051413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:51,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456654224] [2021-07-13 19:32:51,348 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 [2021-07-13 19:32:51,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:32:51,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:51,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 19:32:51,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:51,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456654224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:51,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:51,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:32:51,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151500695] [2021-07-13 19:32:51,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:32:51,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:51,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:32:51,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:32:51,745 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) [2021-07-13 19:32:52,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:52,436 INFO L93 Difference]: Finished difference Result 270 states and 592 transitions. [2021-07-13 19:32:52,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:32:52,436 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 [2021-07-13 19:32:52,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:52,436 INFO L225 Difference]: With dead ends: 270 [2021-07-13 19:32:52,436 INFO L226 Difference]: Without dead ends: 270 [2021-07-13 19:32:52,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 807.7ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:32:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-07-13 19:32:52,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 224. [2021-07-13 19:32:52,438 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) [2021-07-13 19:32:52,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 502 transitions. [2021-07-13 19:32:52,439 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 502 transitions. Word has length 19 [2021-07-13 19:32:52,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:52,439 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 502 transitions. [2021-07-13 19:32:52,439 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) [2021-07-13 19:32:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 502 transitions. [2021-07-13 19:32:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:52,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:52,439 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:52,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2171,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:52,640 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:52,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:52,640 INFO L82 PathProgramCache]: Analyzing trace with hash 827188133, now seen corresponding path program 274 times [2021-07-13 19:32:52,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:52,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955321022] [2021-07-13 19:32:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:52,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:52,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955321022] [2021-07-13 19:32:52,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955321022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:52,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164579609] [2021-07-13 19:32:52,732 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 [2021-07-13 19:32:52,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:52,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:52,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:52,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:52,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164579609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:52,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:52,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:52,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160386109] [2021-07-13 19:32:52,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:52,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:52,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:52,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:52,953 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) [2021-07-13 19:32:53,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:53,744 INFO L93 Difference]: Finished difference Result 294 states and 627 transitions. [2021-07-13 19:32:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:32:53,745 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 [2021-07-13 19:32:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:53,745 INFO L225 Difference]: With dead ends: 294 [2021-07-13 19:32:53,745 INFO L226 Difference]: Without dead ends: 294 [2021-07-13 19:32:53,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 776.4ms TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:32:53,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-13 19:32:53,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2021-07-13 19:32:53,747 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) [2021-07-13 19:32:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 506 transitions. [2021-07-13 19:32:53,748 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 506 transitions. Word has length 19 [2021-07-13 19:32:53,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:53,748 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 506 transitions. [2021-07-13 19:32:53,748 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) [2021-07-13 19:32:53,748 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 506 transitions. [2021-07-13 19:32:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:53,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:53,748 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:53,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2177 [2021-07-13 19:32:53,949 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:53,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1303499579, now seen corresponding path program 275 times [2021-07-13 19:32:53,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:53,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365585807] [2021-07-13 19:32:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:54,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:54,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365585807] [2021-07-13 19:32:54,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365585807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:54,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383188157] [2021-07-13 19:32:54,036 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 [2021-07-13 19:32:54,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:32:54,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:54,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:54,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:54,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383188157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:54,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:54,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:54,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143651447] [2021-07-13 19:32:54,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:54,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:54,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:54,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:54,256 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) [2021-07-13 19:32:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:54,806 INFO L93 Difference]: Finished difference Result 261 states and 570 transitions. [2021-07-13 19:32:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:32:54,806 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 [2021-07-13 19:32:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:54,806 INFO L225 Difference]: With dead ends: 261 [2021-07-13 19:32:54,806 INFO L226 Difference]: Without dead ends: 258 [2021-07-13 19:32:54,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 594.8ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:32:54,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-13 19:32:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 225. [2021-07-13 19:32:54,809 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) [2021-07-13 19:32:54,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 505 transitions. [2021-07-13 19:32:54,809 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 505 transitions. Word has length 19 [2021-07-13 19:32:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:54,809 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 505 transitions. [2021-07-13 19:32:54,809 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) [2021-07-13 19:32:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 505 transitions. [2021-07-13 19:32:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:54,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:54,809 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:55,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2184 [2021-07-13 19:32:55,010 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:55,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:55,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1954584226, now seen corresponding path program 276 times [2021-07-13 19:32:55,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:55,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162804079] [2021-07-13 19:32:55,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:55,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:55,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162804079] [2021-07-13 19:32:55,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162804079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:55,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734172976] [2021-07-13 19:32:55,099 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 [2021-07-13 19:32:55,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:32:55,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:55,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:55,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:55,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734172976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:55,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:55,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:32:55,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937985548] [2021-07-13 19:32:55,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:32:55,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:55,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:32:55,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:55,367 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) [2021-07-13 19:32:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:55,674 INFO L93 Difference]: Finished difference Result 245 states and 540 transitions. [2021-07-13 19:32:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:32:55,675 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 [2021-07-13 19:32:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:55,675 INFO L225 Difference]: With dead ends: 245 [2021-07-13 19:32:55,675 INFO L226 Difference]: Without dead ends: 243 [2021-07-13 19:32:55,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 411.5ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:32:55,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-13 19:32:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2021-07-13 19:32:55,677 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) [2021-07-13 19:32:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 496 transitions. [2021-07-13 19:32:55,677 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 496 transitions. Word has length 19 [2021-07-13 19:32:55,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:55,677 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 496 transitions. [2021-07-13 19:32:55,678 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) [2021-07-13 19:32:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 496 transitions. [2021-07-13 19:32:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:55,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:55,678 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:55,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2192,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:55,878 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:55,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:55,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1926062273, now seen corresponding path program 277 times [2021-07-13 19:32:55,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:55,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873307163] [2021-07-13 19:32:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:55,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:55,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873307163] [2021-07-13 19:32:55,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873307163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:55,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691319302] [2021-07-13 19:32:55,974 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 [2021-07-13 19:32:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:56,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:56,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691319302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:56,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:56,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:56,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9086978] [2021-07-13 19:32:56,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:56,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:56,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:56,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:56,168 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) [2021-07-13 19:32:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:56,330 INFO L93 Difference]: Finished difference Result 256 states and 562 transitions. [2021-07-13 19:32:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:32:56,330 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 [2021-07-13 19:32:56,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:56,330 INFO L225 Difference]: With dead ends: 256 [2021-07-13 19:32:56,330 INFO L226 Difference]: Without dead ends: 256 [2021-07-13 19:32:56,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:32:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-07-13 19:32:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 219. [2021-07-13 19:32:56,332 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) [2021-07-13 19:32:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 490 transitions. [2021-07-13 19:32:56,333 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 490 transitions. Word has length 19 [2021-07-13 19:32:56,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:56,333 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 490 transitions. [2021-07-13 19:32:56,333 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) [2021-07-13 19:32:56,333 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 490 transitions. [2021-07-13 19:32:56,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:56,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:56,333 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:56,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2200 [2021-07-13 19:32:56,549 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:56,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:56,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2094645311, now seen corresponding path program 278 times [2021-07-13 19:32:56,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:56,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041843260] [2021-07-13 19:32:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:56,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:56,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041843260] [2021-07-13 19:32:56,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041843260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:56,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681489513] [2021-07-13 19:32:56,645 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 [2021-07-13 19:32:56,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:32:56,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:56,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:56,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:56,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681489513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:56,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:56,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:56,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562562971] [2021-07-13 19:32:56,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:56,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:56,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:56,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:56,871 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) [2021-07-13 19:32:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:57,280 INFO L93 Difference]: Finished difference Result 263 states and 576 transitions. [2021-07-13 19:32:57,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:32:57,280 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 [2021-07-13 19:32:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:57,280 INFO L225 Difference]: With dead ends: 263 [2021-07-13 19:32:57,280 INFO L226 Difference]: Without dead ends: 263 [2021-07-13 19:32:57,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 445.4ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:32:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-13 19:32:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 216. [2021-07-13 19:32:57,282 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) [2021-07-13 19:32:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 484 transitions. [2021-07-13 19:32:57,283 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 484 transitions. Word has length 19 [2021-07-13 19:32:57,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:57,283 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 484 transitions. [2021-07-13 19:32:57,283 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) [2021-07-13 19:32:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 484 transitions. [2021-07-13 19:32:57,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:57,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:57,283 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:57,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2205,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:57,484 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:57,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:57,484 INFO L82 PathProgramCache]: Analyzing trace with hash -554628451, now seen corresponding path program 279 times [2021-07-13 19:32:57,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:57,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61683275] [2021-07-13 19:32:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:57,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:57,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61683275] [2021-07-13 19:32:57,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61683275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:57,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397001946] [2021-07-13 19:32:57,599 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 [2021-07-13 19:32:57,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:32:57,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:57,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:57,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:57,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397001946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:57,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:57,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:57,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770563952] [2021-07-13 19:32:57,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:57,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:57,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:57,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:57,860 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) [2021-07-13 19:32:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:58,091 INFO L93 Difference]: Finished difference Result 240 states and 525 transitions. [2021-07-13 19:32:58,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:32:58,091 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 [2021-07-13 19:32:58,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:58,091 INFO L225 Difference]: With dead ends: 240 [2021-07-13 19:32:58,091 INFO L226 Difference]: Without dead ends: 234 [2021-07-13 19:32:58,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 401.6ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:32:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-13 19:32:58,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 212. [2021-07-13 19:32:58,093 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) [2021-07-13 19:32:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 475 transitions. [2021-07-13 19:32:58,094 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 475 transitions. Word has length 19 [2021-07-13 19:32:58,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:58,094 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 475 transitions. [2021-07-13 19:32:58,094 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) [2021-07-13 19:32:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 475 transitions. [2021-07-13 19:32:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:58,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:58,094 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:58,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-07-13 19:32:58,295 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:58,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:58,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1289595419, now seen corresponding path program 280 times [2021-07-13 19:32:58,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:58,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124223848] [2021-07-13 19:32:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:58,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:58,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124223848] [2021-07-13 19:32:58,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124223848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:58,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059213643] [2021-07-13 19:32:58,386 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 [2021-07-13 19:32:58,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:32:58,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:58,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:58,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059213643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:58,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:58,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:58,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649158888] [2021-07-13 19:32:58,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:58,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:58,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:58,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:58,583 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) [2021-07-13 19:32:58,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:58,739 INFO L93 Difference]: Finished difference Result 245 states and 539 transitions. [2021-07-13 19:32:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:32:58,739 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 [2021-07-13 19:32:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:58,740 INFO L225 Difference]: With dead ends: 245 [2021-07-13 19:32:58,740 INFO L226 Difference]: Without dead ends: 245 [2021-07-13 19:32:58,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-13 19:32:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 213. [2021-07-13 19:32:58,742 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) [2021-07-13 19:32:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 477 transitions. [2021-07-13 19:32:58,742 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 477 transitions. Word has length 19 [2021-07-13 19:32:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:58,742 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 477 transitions. [2021-07-13 19:32:58,742 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) [2021-07-13 19:32:58,742 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 477 transitions. [2021-07-13 19:32:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:58,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:58,743 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:58,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2220,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:32:58,943 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:58,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:58,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1934376413, now seen corresponding path program 281 times [2021-07-13 19:32:58,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:58,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382089633] [2021-07-13 19:32:58,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:59,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:59,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382089633] [2021-07-13 19:32:59,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382089633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:59,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139603978] [2021-07-13 19:32:59,037 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 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 [2021-07-13 19:32:59,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:32:59,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:59,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:59,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:32:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:59,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139603978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:59,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:32:59,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:32:59,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648831754] [2021-07-13 19:32:59,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:32:59,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:32:59,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:32:59,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:32:59,252 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) [2021-07-13 19:32:59,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:32:59,622 INFO L93 Difference]: Finished difference Result 260 states and 569 transitions. [2021-07-13 19:32:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:32:59,622 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 [2021-07-13 19:32:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:32:59,622 INFO L225 Difference]: With dead ends: 260 [2021-07-13 19:32:59,622 INFO L226 Difference]: Without dead ends: 260 [2021-07-13 19:32:59,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 405.1ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:32:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-13 19:32:59,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 214. [2021-07-13 19:32:59,624 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) [2021-07-13 19:32:59,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 479 transitions. [2021-07-13 19:32:59,625 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 479 transitions. Word has length 19 [2021-07-13 19:32:59,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:32:59,625 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 479 transitions. [2021-07-13 19:32:59,625 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) [2021-07-13 19:32:59,625 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 479 transitions. [2021-07-13 19:32:59,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:32:59,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:32:59,625 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:32:59,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2225 [2021-07-13 19:32:59,826 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:32:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:32:59,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1563855131, now seen corresponding path program 282 times [2021-07-13 19:32:59,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:32:59,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931280460] [2021-07-13 19:32:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:32:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:32:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:32:59,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:32:59,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931280460] [2021-07-13 19:32:59,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931280460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:32:59,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058551107] [2021-07-13 19:32:59,916 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 [2021-07-13 19:32:59,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:32:59,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:32:59,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:32:59,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:00,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058551107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:00,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:00,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:00,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428795166] [2021-07-13 19:33:00,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:00,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:00,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:00,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:00,121 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) [2021-07-13 19:33:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:00,616 INFO L93 Difference]: Finished difference Result 283 states and 608 transitions. [2021-07-13 19:33:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:33:00,616 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 [2021-07-13 19:33:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:00,616 INFO L225 Difference]: With dead ends: 283 [2021-07-13 19:33:00,616 INFO L226 Difference]: Without dead ends: 283 [2021-07-13 19:33:00,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 541.1ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:33:00,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-13 19:33:00,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 215. [2021-07-13 19:33:00,619 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) [2021-07-13 19:33:00,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-07-13 19:33:00,619 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-07-13 19:33:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:00,619 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-07-13 19:33:00,619 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) [2021-07-13 19:33:00,619 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-07-13 19:33:00,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:00,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:00,619 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:00,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2230,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:00,820 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:00,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:00,820 INFO L82 PathProgramCache]: Analyzing trace with hash -436459038, now seen corresponding path program 283 times [2021-07-13 19:33:00,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:00,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568643845] [2021-07-13 19:33:00,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:00,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:00,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568643845] [2021-07-13 19:33:00,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568643845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:00,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838779555] [2021-07-13 19:33:00,912 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 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 [2021-07-13 19:33:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:00,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:00,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:01,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838779555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:01,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:01,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:01,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688766404] [2021-07-13 19:33:01,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:01,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:01,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:01,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:01,156 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) [2021-07-13 19:33:01,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:01,386 INFO L93 Difference]: Finished difference Result 260 states and 562 transitions. [2021-07-13 19:33:01,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:33:01,386 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 [2021-07-13 19:33:01,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:01,387 INFO L225 Difference]: With dead ends: 260 [2021-07-13 19:33:01,387 INFO L226 Difference]: Without dead ends: 260 [2021-07-13 19:33:01,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:33:01,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-13 19:33:01,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 215. [2021-07-13 19:33:01,389 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) [2021-07-13 19:33:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-07-13 19:33:01,389 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-07-13 19:33:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:01,389 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-07-13 19:33:01,389 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) [2021-07-13 19:33:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-07-13 19:33:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:01,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:01,390 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:01,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2237,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:01,590 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:01,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:01,590 INFO L82 PathProgramCache]: Analyzing trace with hash 451241475, now seen corresponding path program 284 times [2021-07-13 19:33:01,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:01,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449237273] [2021-07-13 19:33:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:01,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:01,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449237273] [2021-07-13 19:33:01,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449237273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:01,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163987641] [2021-07-13 19:33:01,707 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 [2021-07-13 19:33:01,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:01,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:01,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:01,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:01,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163987641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:01,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:01,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:01,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326817005] [2021-07-13 19:33:01,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:01,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:01,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:01,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:01,905 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) [2021-07-13 19:33:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:02,125 INFO L93 Difference]: Finished difference Result 238 states and 527 transitions. [2021-07-13 19:33:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:33:02,126 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 [2021-07-13 19:33:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:02,126 INFO L225 Difference]: With dead ends: 238 [2021-07-13 19:33:02,126 INFO L226 Difference]: Without dead ends: 238 [2021-07-13 19:33:02,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:33:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-13 19:33:02,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 216. [2021-07-13 19:33:02,128 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) [2021-07-13 19:33:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 485 transitions. [2021-07-13 19:33:02,129 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 485 transitions. Word has length 19 [2021-07-13 19:33:02,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:02,129 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 485 transitions. [2021-07-13 19:33:02,129 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) [2021-07-13 19:33:02,129 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 485 transitions. [2021-07-13 19:33:02,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:02,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:02,129 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:02,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2245 [2021-07-13 19:33:02,345 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:02,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:02,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1247977227, now seen corresponding path program 285 times [2021-07-13 19:33:02,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:02,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095680550] [2021-07-13 19:33:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:02,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:02,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095680550] [2021-07-13 19:33:02,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095680550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:02,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154146204] [2021-07-13 19:33:02,453 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 [2021-07-13 19:33:02,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:33:02,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:02,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:02,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:02,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154146204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:02,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:02,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:02,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47663825] [2021-07-13 19:33:02,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:02,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:02,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:02,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:02,660 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) [2021-07-13 19:33:03,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:03,115 INFO L93 Difference]: Finished difference Result 276 states and 591 transitions. [2021-07-13 19:33:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:33:03,115 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 [2021-07-13 19:33:03,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:03,116 INFO L225 Difference]: With dead ends: 276 [2021-07-13 19:33:03,116 INFO L226 Difference]: Without dead ends: 276 [2021-07-13 19:33:03,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 502.1ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:33:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-07-13 19:33:03,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 217. [2021-07-13 19:33:03,118 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) [2021-07-13 19:33:03,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 488 transitions. [2021-07-13 19:33:03,118 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 488 transitions. Word has length 19 [2021-07-13 19:33:03,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:03,118 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 488 transitions. [2021-07-13 19:33:03,118 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) [2021-07-13 19:33:03,118 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 488 transitions. [2021-07-13 19:33:03,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:03,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:03,119 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:03,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2250,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:03,319 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:03,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1724288673, now seen corresponding path program 286 times [2021-07-13 19:33:03,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:03,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639182174] [2021-07-13 19:33:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:03,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:03,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639182174] [2021-07-13 19:33:03,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639182174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:03,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512337656] [2021-07-13 19:33:03,428 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 [2021-07-13 19:33:03,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:03,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:03,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:03,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:03,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512337656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:03,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:03,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:03,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341170607] [2021-07-13 19:33:03,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:03,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:03,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:03,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:03,627 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) [2021-07-13 19:33:03,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:03,974 INFO L93 Difference]: Finished difference Result 243 states and 534 transitions. [2021-07-13 19:33:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:33:03,974 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 [2021-07-13 19:33:03,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:03,975 INFO L225 Difference]: With dead ends: 243 [2021-07-13 19:33:03,975 INFO L226 Difference]: Without dead ends: 240 [2021-07-13 19:33:03,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:33:03,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-13 19:33:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 217. [2021-07-13 19:33:03,977 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) [2021-07-13 19:33:03,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-07-13 19:33:03,977 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-07-13 19:33:03,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:03,977 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-07-13 19:33:03,977 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) [2021-07-13 19:33:03,977 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-07-13 19:33:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:03,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:03,978 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:04,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2257,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:04,178 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:04,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:04,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1919593976, now seen corresponding path program 287 times [2021-07-13 19:33:04,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:04,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602183310] [2021-07-13 19:33:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:04,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:04,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602183310] [2021-07-13 19:33:04,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602183310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:04,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682106444] [2021-07-13 19:33:04,291 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 [2021-07-13 19:33:04,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:33:04,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:04,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:04,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682106444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:04,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:04,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:04,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835673545] [2021-07-13 19:33:04,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:04,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:04,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:04,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:04,527 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) [2021-07-13 19:33:04,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:04,828 INFO L93 Difference]: Finished difference Result 247 states and 545 transitions. [2021-07-13 19:33:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:04,828 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 [2021-07-13 19:33:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:04,829 INFO L225 Difference]: With dead ends: 247 [2021-07-13 19:33:04,829 INFO L226 Difference]: Without dead ends: 247 [2021-07-13 19:33:04,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 406.9ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:33:04,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-13 19:33:04,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 215. [2021-07-13 19:33:04,831 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) [2021-07-13 19:33:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-07-13 19:33:04,831 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-07-13 19:33:04,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:04,831 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-07-13 19:33:04,831 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) [2021-07-13 19:33:04,831 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-07-13 19:33:04,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:04,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:04,831 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:05,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2265 [2021-07-13 19:33:05,032 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:05,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:05,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1754323493, now seen corresponding path program 288 times [2021-07-13 19:33:05,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:05,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915073114] [2021-07-13 19:33:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:05,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:05,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915073114] [2021-07-13 19:33:05,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915073114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:05,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985229277] [2021-07-13 19:33:05,146 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 [2021-07-13 19:33:05,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:33:05,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:05,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:05,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:05,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985229277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:05,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:05,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:05,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716720876] [2021-07-13 19:33:05,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:05,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:05,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:05,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:05,416 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) [2021-07-13 19:33:05,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:05,720 INFO L93 Difference]: Finished difference Result 255 states and 554 transitions. [2021-07-13 19:33:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:33:05,720 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 [2021-07-13 19:33:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:05,721 INFO L225 Difference]: With dead ends: 255 [2021-07-13 19:33:05,721 INFO L226 Difference]: Without dead ends: 255 [2021-07-13 19:33:05,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:33:05,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-13 19:33:05,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 217. [2021-07-13 19:33:05,723 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) [2021-07-13 19:33:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 488 transitions. [2021-07-13 19:33:05,723 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 488 transitions. Word has length 19 [2021-07-13 19:33:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:05,723 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 488 transitions. [2021-07-13 19:33:05,723 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) [2021-07-13 19:33:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 488 transitions. [2021-07-13 19:33:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:05,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:05,724 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:05,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2273,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:05,924 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:05,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:05,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2041873728, now seen corresponding path program 289 times [2021-07-13 19:33:05,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:05,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589350650] [2021-07-13 19:33:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:06,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:06,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589350650] [2021-07-13 19:33:06,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589350650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:06,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837267516] [2021-07-13 19:33:06,039 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 [2021-07-13 19:33:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:06,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:06,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:06,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837267516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:06,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:06,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:06,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574049767] [2021-07-13 19:33:06,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:06,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:06,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:06,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:06,236 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) [2021-07-13 19:33:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:06,609 INFO L93 Difference]: Finished difference Result 317 states and 668 transitions. [2021-07-13 19:33:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:33:06,610 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 [2021-07-13 19:33:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:06,610 INFO L225 Difference]: With dead ends: 317 [2021-07-13 19:33:06,610 INFO L226 Difference]: Without dead ends: 317 [2021-07-13 19:33:06,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 431.8ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:33:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-13 19:33:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 218. [2021-07-13 19:33:06,612 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) [2021-07-13 19:33:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 493 transitions. [2021-07-13 19:33:06,613 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 493 transitions. Word has length 19 [2021-07-13 19:33:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:06,613 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 493 transitions. [2021-07-13 19:33:06,613 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) [2021-07-13 19:33:06,613 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 493 transitions. [2021-07-13 19:33:06,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:06,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:06,613 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:06,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2281 [2021-07-13 19:33:06,814 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:06,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:06,814 INFO L82 PathProgramCache]: Analyzing trace with hash 81838403, now seen corresponding path program 290 times [2021-07-13 19:33:06,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:06,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832770069] [2021-07-13 19:33:06,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:06,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:06,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832770069] [2021-07-13 19:33:06,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832770069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:06,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698411316] [2021-07-13 19:33:06,925 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 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 [2021-07-13 19:33:06,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:06,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:06,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:06,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:07,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698411316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:07,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:07,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:07,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179911214] [2021-07-13 19:33:07,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:07,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:07,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:07,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:07,186 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) [2021-07-13 19:33:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:07,432 INFO L93 Difference]: Finished difference Result 242 states and 534 transitions. [2021-07-13 19:33:07,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:07,432 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 [2021-07-13 19:33:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:07,433 INFO L225 Difference]: With dead ends: 242 [2021-07-13 19:33:07,433 INFO L226 Difference]: Without dead ends: 236 [2021-07-13 19:33:07,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:33:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-13 19:33:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 218. [2021-07-13 19:33:07,435 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) [2021-07-13 19:33:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 492 transitions. [2021-07-13 19:33:07,435 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 492 transitions. Word has length 19 [2021-07-13 19:33:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:07,435 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 492 transitions. [2021-07-13 19:33:07,435 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) [2021-07-13 19:33:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 492 transitions. [2021-07-13 19:33:07,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:07,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:07,435 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:07,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2288 [2021-07-13 19:33:07,636 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:07,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:07,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1951103288, now seen corresponding path program 291 times [2021-07-13 19:33:07,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:07,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14342035] [2021-07-13 19:33:07,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:07,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:07,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14342035] [2021-07-13 19:33:07,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14342035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:07,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636350510] [2021-07-13 19:33:07,752 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 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 [2021-07-13 19:33:07,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:33:07,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:07,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:33:07,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:07,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636350510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:07,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:07,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:07,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097280663] [2021-07-13 19:33:07,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:07,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:07,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:07,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:07,956 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) [2021-07-13 19:33:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:08,252 INFO L93 Difference]: Finished difference Result 265 states and 581 transitions. [2021-07-13 19:33:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:33:08,252 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 [2021-07-13 19:33:08,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:08,252 INFO L225 Difference]: With dead ends: 265 [2021-07-13 19:33:08,253 INFO L226 Difference]: Without dead ends: 265 [2021-07-13 19:33:08,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 371.2ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:33:08,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-13 19:33:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 214. [2021-07-13 19:33:08,255 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) [2021-07-13 19:33:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-07-13 19:33:08,255 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-07-13 19:33:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:08,255 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-07-13 19:33:08,255 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) [2021-07-13 19:33:08,255 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-07-13 19:33:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:08,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:08,255 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:08,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2296,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:08,456 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:08,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:08,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1718698653, now seen corresponding path program 292 times [2021-07-13 19:33:08,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:08,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095593460] [2021-07-13 19:33:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:08,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:08,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095593460] [2021-07-13 19:33:08,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095593460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:08,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614100047] [2021-07-13 19:33:08,575 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 [2021-07-13 19:33:08,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:08,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:08,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:08,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:08,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614100047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:08,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:08,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:08,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177774167] [2021-07-13 19:33:08,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:08,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:08,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:08,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:08,775 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) [2021-07-13 19:33:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:08,960 INFO L93 Difference]: Finished difference Result 237 states and 525 transitions. [2021-07-13 19:33:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:08,961 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 [2021-07-13 19:33:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:08,961 INFO L225 Difference]: With dead ends: 237 [2021-07-13 19:33:08,961 INFO L226 Difference]: Without dead ends: 237 [2021-07-13 19:33:08,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:33:08,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-13 19:33:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 215. [2021-07-13 19:33:08,963 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) [2021-07-13 19:33:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-07-13 19:33:08,963 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-07-13 19:33:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:08,963 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-07-13 19:33:08,963 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) [2021-07-13 19:33:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-07-13 19:33:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:08,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:08,964 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:09,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2301,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:09,164 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:09,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:09,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1779532891, now seen corresponding path program 293 times [2021-07-13 19:33:09,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:09,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115940387] [2021-07-13 19:33:09,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:09,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:09,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115940387] [2021-07-13 19:33:09,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115940387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:09,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510975787] [2021-07-13 19:33:09,281 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 [2021-07-13 19:33:09,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:33:09,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:09,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:33:09,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:09,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510975787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:09,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:09,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:09,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867296575] [2021-07-13 19:33:09,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:09,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:09,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:09,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:09,547 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) [2021-07-13 19:33:09,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:09,812 INFO L93 Difference]: Finished difference Result 255 states and 558 transitions. [2021-07-13 19:33:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:33:09,812 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 [2021-07-13 19:33:09,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:09,812 INFO L225 Difference]: With dead ends: 255 [2021-07-13 19:33:09,812 INFO L226 Difference]: Without dead ends: 252 [2021-07-13 19:33:09,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 357.4ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:33:09,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-13 19:33:09,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 216. [2021-07-13 19:33:09,814 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) [2021-07-13 19:33:09,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 486 transitions. [2021-07-13 19:33:09,815 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 486 transitions. Word has length 19 [2021-07-13 19:33:09,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:09,815 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 486 transitions. [2021-07-13 19:33:09,815 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) [2021-07-13 19:33:09,815 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 486 transitions. [2021-07-13 19:33:09,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:09,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:09,815 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:10,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2306 [2021-07-13 19:33:10,032 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:10,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:10,032 INFO L82 PathProgramCache]: Analyzing trace with hash -652136798, now seen corresponding path program 294 times [2021-07-13 19:33:10,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:10,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128989717] [2021-07-13 19:33:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:10,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:10,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128989717] [2021-07-13 19:33:10,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128989717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:10,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122321720] [2021-07-13 19:33:10,144 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 [2021-07-13 19:33:10,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:33:10,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:10,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:10,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:10,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122321720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:10,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:10,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:10,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326373947] [2021-07-13 19:33:10,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:10,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:10,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:10,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:10,378 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) [2021-07-13 19:33:10,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:10,996 INFO L93 Difference]: Finished difference Result 359 states and 741 transitions. [2021-07-13 19:33:10,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:33:10,997 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 [2021-07-13 19:33:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:10,997 INFO L225 Difference]: With dead ends: 359 [2021-07-13 19:33:10,997 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 19:33:10,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 687.7ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:33:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 19:33:11,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 221. [2021-07-13 19:33:11,000 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) [2021-07-13 19:33:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 501 transitions. [2021-07-13 19:33:11,000 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 501 transitions. Word has length 19 [2021-07-13 19:33:11,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:11,000 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 501 transitions. [2021-07-13 19:33:11,000 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) [2021-07-13 19:33:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 501 transitions. [2021-07-13 19:33:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:11,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:11,001 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:11,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2314,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:11,201 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:11,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:11,201 INFO L82 PathProgramCache]: Analyzing trace with hash -145790532, now seen corresponding path program 295 times [2021-07-13 19:33:11,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:11,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380066438] [2021-07-13 19:33:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:11,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:11,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380066438] [2021-07-13 19:33:11,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380066438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:11,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512701262] [2021-07-13 19:33:11,315 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 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 [2021-07-13 19:33:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:11,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:11,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:11,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512701262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:11,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:11,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:11,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584307467] [2021-07-13 19:33:11,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:11,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:11,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:11,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:11,515 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) [2021-07-13 19:33:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:12,000 INFO L93 Difference]: Finished difference Result 310 states and 655 transitions. [2021-07-13 19:33:12,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:33:12,000 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 [2021-07-13 19:33:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:12,001 INFO L225 Difference]: With dead ends: 310 [2021-07-13 19:33:12,001 INFO L226 Difference]: Without dead ends: 310 [2021-07-13 19:33:12,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 511.5ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:33:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-07-13 19:33:12,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 220. [2021-07-13 19:33:12,003 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) [2021-07-13 19:33:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 497 transitions. [2021-07-13 19:33:12,003 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 497 transitions. Word has length 19 [2021-07-13 19:33:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:12,004 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 497 transitions. [2021-07-13 19:33:12,004 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) [2021-07-13 19:33:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 497 transitions. [2021-07-13 19:33:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:12,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:12,004 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:12,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2322 [2021-07-13 19:33:12,205 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:12,205 INFO L82 PathProgramCache]: Analyzing trace with hash -683646110, now seen corresponding path program 296 times [2021-07-13 19:33:12,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:12,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119892253] [2021-07-13 19:33:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:12,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:12,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119892253] [2021-07-13 19:33:12,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119892253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:12,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465372084] [2021-07-13 19:33:12,334 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 [2021-07-13 19:33:12,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:12,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:12,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:12,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:12,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465372084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:12,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:12,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:12,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932876941] [2021-07-13 19:33:12,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:12,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:12,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:12,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:12,536 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) [2021-07-13 19:33:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:12,833 INFO L93 Difference]: Finished difference Result 263 states and 578 transitions. [2021-07-13 19:33:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:33:12,833 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 [2021-07-13 19:33:12,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:12,833 INFO L225 Difference]: With dead ends: 263 [2021-07-13 19:33:12,833 INFO L226 Difference]: Without dead ends: 263 [2021-07-13 19:33:12,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:33:12,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-13 19:33:12,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 218. [2021-07-13 19:33:12,835 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) [2021-07-13 19:33:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-07-13 19:33:12,836 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-07-13 19:33:12,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:12,836 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-07-13 19:33:12,836 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) [2021-07-13 19:33:12,836 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-07-13 19:33:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:12,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:12,836 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:13,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2329 [2021-07-13 19:33:13,037 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:13,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1538645733, now seen corresponding path program 297 times [2021-07-13 19:33:13,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:13,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82313675] [2021-07-13 19:33:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:13,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:13,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82313675] [2021-07-13 19:33:13,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82313675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:13,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735705479] [2021-07-13 19:33:13,133 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 [2021-07-13 19:33:13,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:33:13,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:13,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:13,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:13,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735705479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:13,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:13,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:13,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819686899] [2021-07-13 19:33:13,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:13,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:13,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:13,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:13,412 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) [2021-07-13 19:33:13,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:13,718 INFO L93 Difference]: Finished difference Result 258 states and 561 transitions. [2021-07-13 19:33:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:33:13,718 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 [2021-07-13 19:33:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:13,719 INFO L225 Difference]: With dead ends: 258 [2021-07-13 19:33:13,719 INFO L226 Difference]: Without dead ends: 258 [2021-07-13 19:33:13,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 437.4ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:33:13,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-13 19:33:13,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 221. [2021-07-13 19:33:13,721 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) [2021-07-13 19:33:13,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 498 transitions. [2021-07-13 19:33:13,721 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 498 transitions. Word has length 19 [2021-07-13 19:33:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:13,721 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 498 transitions. [2021-07-13 19:33:13,721 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) [2021-07-13 19:33:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 498 transitions. [2021-07-13 19:33:13,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:13,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:13,722 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:13,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2334 [2021-07-13 19:33:13,922 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:13,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:13,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1826195968, now seen corresponding path program 298 times [2021-07-13 19:33:13,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:13,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491716370] [2021-07-13 19:33:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:14,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:14,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491716370] [2021-07-13 19:33:14,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491716370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:14,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998458629] [2021-07-13 19:33:14,015 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 [2021-07-13 19:33:14,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:14,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:14,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:14,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:14,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998458629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:14,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:14,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:14,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845743858] [2021-07-13 19:33:14,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:14,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:14,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:14,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:14,220 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) [2021-07-13 19:33:14,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:14,704 INFO L93 Difference]: Finished difference Result 298 states and 631 transitions. [2021-07-13 19:33:14,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:33:14,704 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 [2021-07-13 19:33:14,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:14,705 INFO L225 Difference]: With dead ends: 298 [2021-07-13 19:33:14,705 INFO L226 Difference]: Without dead ends: 298 [2021-07-13 19:33:14,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 530.3ms TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:33:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-07-13 19:33:14,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 223. [2021-07-13 19:33:14,707 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) [2021-07-13 19:33:14,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 506 transitions. [2021-07-13 19:33:14,707 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 506 transitions. Word has length 19 [2021-07-13 19:33:14,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:14,708 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 506 transitions. [2021-07-13 19:33:14,708 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) [2021-07-13 19:33:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 506 transitions. [2021-07-13 19:33:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:14,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:14,708 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:14,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2342 [2021-07-13 19:33:14,908 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:14,909 INFO L82 PathProgramCache]: Analyzing trace with hash -133839357, now seen corresponding path program 299 times [2021-07-13 19:33:14,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:14,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806411651] [2021-07-13 19:33:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:15,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:15,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806411651] [2021-07-13 19:33:15,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806411651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:15,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973601083] [2021-07-13 19:33:15,005 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 [2021-07-13 19:33:15,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:33:15,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:15,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:15,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:15,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973601083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:15,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:15,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:15,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219244540] [2021-07-13 19:33:15,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:15,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:15,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:15,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:15,282 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) [2021-07-13 19:33:15,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:15,566 INFO L93 Difference]: Finished difference Result 249 states and 550 transitions. [2021-07-13 19:33:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:33:15,566 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 [2021-07-13 19:33:15,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:15,567 INFO L225 Difference]: With dead ends: 249 [2021-07-13 19:33:15,567 INFO L226 Difference]: Without dead ends: 240 [2021-07-13 19:33:15,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 425.4ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:33:15,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-13 19:33:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 223. [2021-07-13 19:33:15,569 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) [2021-07-13 19:33:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 504 transitions. [2021-07-13 19:33:15,569 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 504 transitions. Word has length 19 [2021-07-13 19:33:15,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:15,569 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 504 transitions. [2021-07-13 19:33:15,569 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) [2021-07-13 19:33:15,569 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 504 transitions. [2021-07-13 19:33:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:15,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:15,570 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:15,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2349 [2021-07-13 19:33:15,770 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:15,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:15,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2128186248, now seen corresponding path program 300 times [2021-07-13 19:33:15,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:15,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640710248] [2021-07-13 19:33:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:15,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:15,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640710248] [2021-07-13 19:33:15,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640710248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:15,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227878675] [2021-07-13 19:33:15,886 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 [2021-07-13 19:33:15,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:33:15,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:15,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:15,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:16,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227878675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:16,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:16,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:16,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283151695] [2021-07-13 19:33:16,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:16,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:16,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:16,100 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) [2021-07-13 19:33:16,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:16,425 INFO L93 Difference]: Finished difference Result 255 states and 564 transitions. [2021-07-13 19:33:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:33:16,425 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 [2021-07-13 19:33:16,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:16,426 INFO L225 Difference]: With dead ends: 255 [2021-07-13 19:33:16,426 INFO L226 Difference]: Without dead ends: 255 [2021-07-13 19:33:16,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 433.5ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:33:16,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-13 19:33:16,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 222. [2021-07-13 19:33:16,428 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) [2021-07-13 19:33:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 502 transitions. [2021-07-13 19:33:16,428 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 502 transitions. Word has length 19 [2021-07-13 19:33:16,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:16,428 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 502 transitions. [2021-07-13 19:33:16,428 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) [2021-07-13 19:33:16,428 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 502 transitions. [2021-07-13 19:33:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:16,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:16,428 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:16,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2357,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:16,629 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:16,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:16,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1660434782, now seen corresponding path program 301 times [2021-07-13 19:33:16,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:16,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132076518] [2021-07-13 19:33:16,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:16,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:16,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132076518] [2021-07-13 19:33:16,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132076518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:16,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244535717] [2021-07-13 19:33:16,724 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 [2021-07-13 19:33:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:16,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:16,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:16,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244535717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:16,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:16,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:16,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916639772] [2021-07-13 19:33:16,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:16,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:16,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:16,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:16,933 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) [2021-07-13 19:33:17,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:17,043 INFO L93 Difference]: Finished difference Result 249 states and 550 transitions. [2021-07-13 19:33:17,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:33:17,043 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 [2021-07-13 19:33:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:17,044 INFO L225 Difference]: With dead ends: 249 [2021-07-13 19:33:17,044 INFO L226 Difference]: Without dead ends: 249 [2021-07-13 19:33:17,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:17,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-13 19:33:17,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 219. [2021-07-13 19:33:17,046 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) [2021-07-13 19:33:17,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-07-13 19:33:17,046 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-07-13 19:33:17,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:17,046 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-07-13 19:33:17,046 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) [2021-07-13 19:33:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-07-13 19:33:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:17,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:17,047 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:17,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2362,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:17,247 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:17,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1443064199, now seen corresponding path program 302 times [2021-07-13 19:33:17,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:17,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706157703] [2021-07-13 19:33:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:17,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:17,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706157703] [2021-07-13 19:33:17,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706157703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:17,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243832134] [2021-07-13 19:33:17,353 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 [2021-07-13 19:33:17,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:17,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:17,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:33:17,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:17,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243832134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:17,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:17,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:17,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118758907] [2021-07-13 19:33:17,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:17,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:17,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:17,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:17,593 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) [2021-07-13 19:33:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:17,902 INFO L93 Difference]: Finished difference Result 238 states and 530 transitions. [2021-07-13 19:33:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:33:17,902 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 [2021-07-13 19:33:17,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:17,903 INFO L225 Difference]: With dead ends: 238 [2021-07-13 19:33:17,903 INFO L226 Difference]: Without dead ends: 238 [2021-07-13 19:33:17,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:33:17,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-13 19:33:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 219. [2021-07-13 19:33:17,905 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) [2021-07-13 19:33:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-07-13 19:33:17,905 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-07-13 19:33:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:17,905 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-07-13 19:33:17,905 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) [2021-07-13 19:33:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-07-13 19:33:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:17,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:17,906 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:18,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2367,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:18,106 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:18,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:18,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1693024113, now seen corresponding path program 303 times [2021-07-13 19:33:18,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:18,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908654533] [2021-07-13 19:33:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:18,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:18,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908654533] [2021-07-13 19:33:18,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908654533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:18,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499096834] [2021-07-13 19:33:18,198 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 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 [2021-07-13 19:33:18,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:33:18,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:18,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:18,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:18,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499096834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:18,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:18,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:18,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846619520] [2021-07-13 19:33:18,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:18,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:18,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:18,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:18,415 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) [2021-07-13 19:33:18,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:18,867 INFO L93 Difference]: Finished difference Result 250 states and 554 transitions. [2021-07-13 19:33:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:18,867 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 [2021-07-13 19:33:18,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:18,867 INFO L225 Difference]: With dead ends: 250 [2021-07-13 19:33:18,867 INFO L226 Difference]: Without dead ends: 250 [2021-07-13 19:33:18,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 524.0ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:33:18,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-07-13 19:33:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 219. [2021-07-13 19:33:18,869 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) [2021-07-13 19:33:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-07-13 19:33:18,870 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-07-13 19:33:18,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:18,870 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-07-13 19:33:18,870 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) [2021-07-13 19:33:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-07-13 19:33:18,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:18,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:18,870 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:19,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2371,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:19,071 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:19,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:19,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1530947719, now seen corresponding path program 304 times [2021-07-13 19:33:19,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:19,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182106099] [2021-07-13 19:33:19,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:19,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:19,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182106099] [2021-07-13 19:33:19,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182106099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:19,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433916672] [2021-07-13 19:33:19,162 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 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 [2021-07-13 19:33:19,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:19,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:19,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:19,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:19,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433916672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:19,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:19,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:19,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774957717] [2021-07-13 19:33:19,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:19,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:19,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:19,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:19,382 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) [2021-07-13 19:33:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:19,920 INFO L93 Difference]: Finished difference Result 255 states and 563 transitions. [2021-07-13 19:33:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:33:19,920 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 [2021-07-13 19:33:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:19,920 INFO L225 Difference]: With dead ends: 255 [2021-07-13 19:33:19,920 INFO L226 Difference]: Without dead ends: 255 [2021-07-13 19:33:19,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 574.0ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:33:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-13 19:33:19,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 219. [2021-07-13 19:33:19,922 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) [2021-07-13 19:33:19,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-07-13 19:33:19,923 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-07-13 19:33:19,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:19,923 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-07-13 19:33:19,923 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) [2021-07-13 19:33:19,923 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-07-13 19:33:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:19,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:19,923 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:20,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2376 [2021-07-13 19:33:20,131 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:20,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1967283825, now seen corresponding path program 305 times [2021-07-13 19:33:20,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:20,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580813638] [2021-07-13 19:33:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:20,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:20,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580813638] [2021-07-13 19:33:20,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580813638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:20,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121653836] [2021-07-13 19:33:20,224 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 [2021-07-13 19:33:20,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:33:20,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:20,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:20,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:20,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121653836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:20,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:20,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:20,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915023531] [2021-07-13 19:33:20,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:20,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:20,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:20,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:20,445 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) [2021-07-13 19:33:21,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:21,235 INFO L93 Difference]: Finished difference Result 289 states and 617 transitions. [2021-07-13 19:33:21,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:33:21,235 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 [2021-07-13 19:33:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:21,235 INFO L225 Difference]: With dead ends: 289 [2021-07-13 19:33:21,236 INFO L226 Difference]: Without dead ends: 289 [2021-07-13 19:33:21,236 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 [2021-07-13 19:33:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-07-13 19:33:21,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 220. [2021-07-13 19:33:21,238 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) [2021-07-13 19:33:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 496 transitions. [2021-07-13 19:33:21,238 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 496 transitions. Word has length 19 [2021-07-13 19:33:21,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:21,238 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 496 transitions. [2021-07-13 19:33:21,238 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) [2021-07-13 19:33:21,238 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 496 transitions. [2021-07-13 19:33:21,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:21,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:21,239 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:21,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2381,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:21,456 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:21,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:21,456 INFO L82 PathProgramCache]: Analyzing trace with hash -839887732, now seen corresponding path program 306 times [2021-07-13 19:33:21,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:21,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690358820] [2021-07-13 19:33:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:21,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:21,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690358820] [2021-07-13 19:33:21,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690358820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:21,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609647186] [2021-07-13 19:33:21,546 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 [2021-07-13 19:33:21,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:33:21,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:21,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:21,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:21,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609647186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:21,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:21,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:21,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500702394] [2021-07-13 19:33:21,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:21,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:21,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:21,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:21,818 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) [2021-07-13 19:33:22,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:22,107 INFO L93 Difference]: Finished difference Result 246 states and 545 transitions. [2021-07-13 19:33:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:33:22,107 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 [2021-07-13 19:33:22,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:22,108 INFO L225 Difference]: With dead ends: 246 [2021-07-13 19:33:22,108 INFO L226 Difference]: Without dead ends: 244 [2021-07-13 19:33:22,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 424.4ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:33:22,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-13 19:33:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 220. [2021-07-13 19:33:22,110 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) [2021-07-13 19:33:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-13 19:33:22,110 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-13 19:33:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:22,110 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-13 19:33:22,110 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) [2021-07-13 19:33:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-13 19:33:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:22,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:22,111 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:22,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2388 [2021-07-13 19:33:22,311 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:22,311 INFO L82 PathProgramCache]: Analyzing trace with hash -425566935, now seen corresponding path program 307 times [2021-07-13 19:33:22,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:22,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271074639] [2021-07-13 19:33:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:22,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:22,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271074639] [2021-07-13 19:33:22,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271074639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:22,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463037570] [2021-07-13 19:33:22,409 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 [2021-07-13 19:33:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:22,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463037570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:22,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:22,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:22,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530957398] [2021-07-13 19:33:22,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:22,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:22,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:22,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:22,601 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) [2021-07-13 19:33:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:22,780 INFO L93 Difference]: Finished difference Result 242 states and 539 transitions. [2021-07-13 19:33:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:33:22,780 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 [2021-07-13 19:33:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:22,781 INFO L225 Difference]: With dead ends: 242 [2021-07-13 19:33:22,781 INFO L226 Difference]: Without dead ends: 242 [2021-07-13 19:33:22,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-13 19:33:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 220. [2021-07-13 19:33:22,783 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) [2021-07-13 19:33:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-13 19:33:22,783 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-13 19:33:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:22,783 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-13 19:33:22,783 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) [2021-07-13 19:33:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-13 19:33:22,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:22,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:22,783 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:22,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:22,984 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:22,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:22,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1496562399, now seen corresponding path program 308 times [2021-07-13 19:33:22,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:22,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093126959] [2021-07-13 19:33:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:23,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:23,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093126959] [2021-07-13 19:33:23,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093126959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:23,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997727034] [2021-07-13 19:33:23,077 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 [2021-07-13 19:33:23,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:23,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:23,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:23,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:23,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997727034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:23,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:23,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:23,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368582910] [2021-07-13 19:33:23,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:23,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:23,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:23,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:23,270 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) [2021-07-13 19:33:23,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:23,716 INFO L93 Difference]: Finished difference Result 256 states and 566 transitions. [2021-07-13 19:33:23,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:23,717 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 [2021-07-13 19:33:23,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:23,717 INFO L225 Difference]: With dead ends: 256 [2021-07-13 19:33:23,717 INFO L226 Difference]: Without dead ends: 256 [2021-07-13 19:33:23,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:33:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-07-13 19:33:23,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 220. [2021-07-13 19:33:23,719 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) [2021-07-13 19:33:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-07-13 19:33:23,720 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-07-13 19:33:23,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:23,720 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-07-13 19:33:23,720 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) [2021-07-13 19:33:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-07-13 19:33:23,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:23,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:23,720 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:23,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2401 [2021-07-13 19:33:23,921 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:23,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:23,921 INFO L82 PathProgramCache]: Analyzing trace with hash 670319846, now seen corresponding path program 309 times [2021-07-13 19:33:23,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:23,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239231906] [2021-07-13 19:33:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:24,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:24,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239231906] [2021-07-13 19:33:24,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239231906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:24,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385194422] [2021-07-13 19:33:24,017 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 [2021-07-13 19:33:24,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:33:24,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:24,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:24,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:24,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385194422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:24,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:24,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:24,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706191502] [2021-07-13 19:33:24,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:24,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:24,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:24,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:24,256 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) [2021-07-13 19:33:24,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:24,586 INFO L93 Difference]: Finished difference Result 272 states and 582 transitions. [2021-07-13 19:33:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:33:24,587 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 [2021-07-13 19:33:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:24,587 INFO L225 Difference]: With dead ends: 272 [2021-07-13 19:33:24,587 INFO L226 Difference]: Without dead ends: 264 [2021-07-13 19:33:24,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:33:24,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-13 19:33:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 224. [2021-07-13 19:33:24,589 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) [2021-07-13 19:33:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 506 transitions. [2021-07-13 19:33:24,590 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 506 transitions. Word has length 19 [2021-07-13 19:33:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:24,590 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 506 transitions. [2021-07-13 19:33:24,590 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) [2021-07-13 19:33:24,590 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 506 transitions. [2021-07-13 19:33:24,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:24,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:24,590 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:24,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:24,791 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:24,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:24,791 INFO L82 PathProgramCache]: Analyzing trace with hash -699826647, now seen corresponding path program 310 times [2021-07-13 19:33:24,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:24,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203599380] [2021-07-13 19:33:24,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:24,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:24,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203599380] [2021-07-13 19:33:24,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203599380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:24,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551357518] [2021-07-13 19:33:24,883 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 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 [2021-07-13 19:33:24,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:24,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:24,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:24,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:25,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551357518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:25,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:25,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:25,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325264367] [2021-07-13 19:33:25,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:25,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:25,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:25,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:25,085 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) [2021-07-13 19:33:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:25,574 INFO L93 Difference]: Finished difference Result 265 states and 584 transitions. [2021-07-13 19:33:25,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:33:25,574 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 [2021-07-13 19:33:25,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:25,575 INFO L225 Difference]: With dead ends: 265 [2021-07-13 19:33:25,575 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:33:25,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 530.5ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:33:25,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:33:25,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 224. [2021-07-13 19:33:25,577 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) [2021-07-13 19:33:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 505 transitions. [2021-07-13 19:33:25,577 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 505 transitions. Word has length 19 [2021-07-13 19:33:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:25,577 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 505 transitions. [2021-07-13 19:33:25,577 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) [2021-07-13 19:33:25,577 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 505 transitions. [2021-07-13 19:33:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:25,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:25,578 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:25,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2413,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:25,778 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:25,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:25,778 INFO L82 PathProgramCache]: Analyzing trace with hash 427569446, now seen corresponding path program 311 times [2021-07-13 19:33:25,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:25,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825067280] [2021-07-13 19:33:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:25,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:25,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825067280] [2021-07-13 19:33:25,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825067280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:25,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903045599] [2021-07-13 19:33:25,870 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 [2021-07-13 19:33:25,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:33:25,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:25,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:33:25,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:26,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903045599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:26,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:26,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:26,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596276566] [2021-07-13 19:33:26,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:26,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:26,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:26,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:26,108 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) [2021-07-13 19:33:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:26,318 INFO L93 Difference]: Finished difference Result 242 states and 539 transitions. [2021-07-13 19:33:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:33:26,319 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 [2021-07-13 19:33:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:26,319 INFO L225 Difference]: With dead ends: 242 [2021-07-13 19:33:26,319 INFO L226 Difference]: Without dead ends: 242 [2021-07-13 19:33:26,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:33:26,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-13 19:33:26,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 218. [2021-07-13 19:33:26,321 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) [2021-07-13 19:33:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-07-13 19:33:26,322 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-07-13 19:33:26,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:26,322 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-07-13 19:33:26,322 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) [2021-07-13 19:33:26,322 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-07-13 19:33:26,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:26,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:26,322 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:26,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2420 [2021-07-13 19:33:26,523 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:26,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:26,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1315269959, now seen corresponding path program 312 times [2021-07-13 19:33:26,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:26,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242404841] [2021-07-13 19:33:26,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:26,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:26,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242404841] [2021-07-13 19:33:26,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242404841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:26,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162911877] [2021-07-13 19:33:26,639 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 [2021-07-13 19:33:26,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:33:26,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:26,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:26,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:26,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162911877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:26,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:26,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:26,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785720540] [2021-07-13 19:33:26,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:26,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:26,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:26,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:26,830 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) [2021-07-13 19:33:27,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:27,039 INFO L93 Difference]: Finished difference Result 243 states and 540 transitions. [2021-07-13 19:33:27,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:33:27,039 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 [2021-07-13 19:33:27,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:27,039 INFO L225 Difference]: With dead ends: 243 [2021-07-13 19:33:27,039 INFO L226 Difference]: Without dead ends: 243 [2021-07-13 19:33:27,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:33:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-13 19:33:27,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 218. [2021-07-13 19:33:27,041 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) [2021-07-13 19:33:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-07-13 19:33:27,042 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-07-13 19:33:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:27,042 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-07-13 19:33:27,042 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) [2021-07-13 19:33:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-07-13 19:33:27,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:27,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:27,042 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:27,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2428,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:27,243 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:27,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:27,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2112005711, now seen corresponding path program 313 times [2021-07-13 19:33:27,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:27,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059859519] [2021-07-13 19:33:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:27,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:27,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059859519] [2021-07-13 19:33:27,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059859519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:27,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530332667] [2021-07-13 19:33:27,355 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 [2021-07-13 19:33:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:27,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:27,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:27,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530332667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:27,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:27,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:27,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805988263] [2021-07-13 19:33:27,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:27,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:27,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:27,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:27,546 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) [2021-07-13 19:33:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:27,830 INFO L93 Difference]: Finished difference Result 249 states and 552 transitions. [2021-07-13 19:33:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:27,830 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 [2021-07-13 19:33:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:27,831 INFO L225 Difference]: With dead ends: 249 [2021-07-13 19:33:27,831 INFO L226 Difference]: Without dead ends: 249 [2021-07-13 19:33:27,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:33:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-13 19:33:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 218. [2021-07-13 19:33:27,833 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) [2021-07-13 19:33:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-07-13 19:33:27,833 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-07-13 19:33:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:27,833 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-07-13 19:33:27,833 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) [2021-07-13 19:33:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-07-13 19:33:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:27,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:27,834 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:28,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2433 [2021-07-13 19:33:28,034 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:28,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1895411350, now seen corresponding path program 314 times [2021-07-13 19:33:28,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:28,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637766994] [2021-07-13 19:33:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:28,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:28,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637766994] [2021-07-13 19:33:28,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637766994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:28,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913027384] [2021-07-13 19:33:28,152 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 [2021-07-13 19:33:28,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:28,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:28,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:28,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:28,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913027384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:28,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:28,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:28,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217819852] [2021-07-13 19:33:28,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:28,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:28,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:28,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:28,371 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) [2021-07-13 19:33:28,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:28,537 INFO L93 Difference]: Finished difference Result 238 states and 530 transitions. [2021-07-13 19:33:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:33:28,537 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 [2021-07-13 19:33:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:28,537 INFO L225 Difference]: With dead ends: 238 [2021-07-13 19:33:28,537 INFO L226 Difference]: Without dead ends: 238 [2021-07-13 19:33:28,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:33:28,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-13 19:33:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 215. [2021-07-13 19:33:28,539 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) [2021-07-13 19:33:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-07-13 19:33:28,540 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-07-13 19:33:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:28,540 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-07-13 19:33:28,540 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) [2021-07-13 19:33:28,540 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-07-13 19:33:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:28,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:28,540 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:28,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2440,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:28,741 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:28,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:28,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1676615319, now seen corresponding path program 315 times [2021-07-13 19:33:28,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:28,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096443300] [2021-07-13 19:33:28,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:28,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:28,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096443300] [2021-07-13 19:33:28,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096443300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:28,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41397693] [2021-07-13 19:33:28,861 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 [2021-07-13 19:33:28,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:33:28,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:28,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:28,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:29,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41397693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:29,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:29,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:29,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753559403] [2021-07-13 19:33:29,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:29,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:29,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:29,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:29,109 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) [2021-07-13 19:33:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:29,396 INFO L93 Difference]: Finished difference Result 249 states and 541 transitions. [2021-07-13 19:33:29,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:33:29,396 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 [2021-07-13 19:33:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:29,397 INFO L225 Difference]: With dead ends: 249 [2021-07-13 19:33:29,397 INFO L226 Difference]: Without dead ends: 249 [2021-07-13 19:33:29,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 415.9ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:33:29,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-13 19:33:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 226. [2021-07-13 19:33:29,399 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) [2021-07-13 19:33:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 503 transitions. [2021-07-13 19:33:29,399 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 503 transitions. Word has length 19 [2021-07-13 19:33:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:29,399 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 503 transitions. [2021-07-13 19:33:29,399 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) [2021-07-13 19:33:29,399 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 503 transitions. [2021-07-13 19:33:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:29,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:29,400 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:29,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2448,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:29,600 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:29,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:29,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1389065084, now seen corresponding path program 316 times [2021-07-13 19:33:29,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:29,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125521516] [2021-07-13 19:33:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:29,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:29,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125521516] [2021-07-13 19:33:29,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125521516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:29,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212426428] [2021-07-13 19:33:29,715 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 [2021-07-13 19:33:29,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:29,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:29,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:29,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:29,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212426428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:29,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:29,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:29,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826367207] [2021-07-13 19:33:29,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:29,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:29,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:29,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:29,901 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) [2021-07-13 19:33:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:30,235 INFO L93 Difference]: Finished difference Result 311 states and 659 transitions. [2021-07-13 19:33:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:33:30,235 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 [2021-07-13 19:33:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:30,235 INFO L225 Difference]: With dead ends: 311 [2021-07-13 19:33:30,236 INFO L226 Difference]: Without dead ends: 311 [2021-07-13 19:33:30,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:33:30,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-13 19:33:30,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 227. [2021-07-13 19:33:30,238 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) [2021-07-13 19:33:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 508 transitions. [2021-07-13 19:33:30,238 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 508 transitions. Word has length 19 [2021-07-13 19:33:30,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:30,238 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 508 transitions. [2021-07-13 19:33:30,238 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) [2021-07-13 19:33:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 508 transitions. [2021-07-13 19:33:30,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:30,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:30,239 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:30,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2456 [2021-07-13 19:33:30,439 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:30,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:30,439 INFO L82 PathProgramCache]: Analyzing trace with hash 945866887, now seen corresponding path program 317 times [2021-07-13 19:33:30,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:30,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502586223] [2021-07-13 19:33:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:30,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:30,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502586223] [2021-07-13 19:33:30,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502586223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:30,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131181110] [2021-07-13 19:33:30,555 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 [2021-07-13 19:33:30,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:33:30,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:30,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:30,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:30,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131181110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:30,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:30,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:30,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439525442] [2021-07-13 19:33:30,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:30,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:30,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:30,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:30,817 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) [2021-07-13 19:33:30,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:30,999 INFO L93 Difference]: Finished difference Result 236 states and 524 transitions. [2021-07-13 19:33:30,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:33:30,999 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 [2021-07-13 19:33:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:31,000 INFO L225 Difference]: With dead ends: 236 [2021-07-13 19:33:31,000 INFO L226 Difference]: Without dead ends: 230 [2021-07-13 19:33:31,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 345.4ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:33:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-13 19:33:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 218. [2021-07-13 19:33:31,002 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) [2021-07-13 19:33:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 492 transitions. [2021-07-13 19:33:31,002 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 492 transitions. Word has length 19 [2021-07-13 19:33:31,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:31,002 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 492 transitions. [2021-07-13 19:33:31,002 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) [2021-07-13 19:33:31,002 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 492 transitions. [2021-07-13 19:33:31,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:31,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:31,003 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:31,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2463 [2021-07-13 19:33:31,203 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:31,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:31,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1087074804, now seen corresponding path program 318 times [2021-07-13 19:33:31,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:31,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365589159] [2021-07-13 19:33:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:31,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:31,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365589159] [2021-07-13 19:33:31,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365589159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:31,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274325912] [2021-07-13 19:33:31,322 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 [2021-07-13 19:33:31,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:33:31,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:31,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:31,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:31,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274325912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:31,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:31,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:31,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843756130] [2021-07-13 19:33:31,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:31,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:31,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:31,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:31,511 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) [2021-07-13 19:33:31,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:31,676 INFO L93 Difference]: Finished difference Result 252 states and 558 transitions. [2021-07-13 19:33:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:33:31,676 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 [2021-07-13 19:33:31,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:31,677 INFO L225 Difference]: With dead ends: 252 [2021-07-13 19:33:31,677 INFO L226 Difference]: Without dead ends: 252 [2021-07-13 19:33:31,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 264.6ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:33:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-13 19:33:31,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 213. [2021-07-13 19:33:31,679 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) [2021-07-13 19:33:31,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 479 transitions. [2021-07-13 19:33:31,679 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 479 transitions. Word has length 19 [2021-07-13 19:33:31,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:31,679 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 479 transitions. [2021-07-13 19:33:31,679 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) [2021-07-13 19:33:31,679 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 479 transitions. [2021-07-13 19:33:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:31,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:31,680 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:31,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2471 [2021-07-13 19:33:31,880 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash 210899919, now seen corresponding path program 319 times [2021-07-13 19:33:31,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:31,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550875893] [2021-07-13 19:33:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:31,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:31,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550875893] [2021-07-13 19:33:31,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550875893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:31,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561177101] [2021-07-13 19:33:31,981 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 [2021-07-13 19:33:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:32,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:33:32,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:32,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561177101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:32,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:32,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:32,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277679185] [2021-07-13 19:33:32,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:32,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:32,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:32,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:32,267 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) [2021-07-13 19:33:32,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:32,438 INFO L93 Difference]: Finished difference Result 236 states and 525 transitions. [2021-07-13 19:33:32,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:33:32,438 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 [2021-07-13 19:33:32,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:32,439 INFO L225 Difference]: With dead ends: 236 [2021-07-13 19:33:32,439 INFO L226 Difference]: Without dead ends: 236 [2021-07-13 19:33:32,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 299.2ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:32,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-13 19:33:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 214. [2021-07-13 19:33:32,441 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) [2021-07-13 19:33:32,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-07-13 19:33:32,441 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-07-13 19:33:32,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:32,441 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-07-13 19:33:32,441 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) [2021-07-13 19:33:32,441 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-07-13 19:33:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:32,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:32,441 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:32,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2476 [2021-07-13 19:33:32,642 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:32,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:32,642 INFO L82 PathProgramCache]: Analyzing trace with hash -860095545, now seen corresponding path program 320 times [2021-07-13 19:33:32,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:32,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087545518] [2021-07-13 19:33:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:32,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:32,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087545518] [2021-07-13 19:33:32,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087545518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:32,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835117930] [2021-07-13 19:33:32,739 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 [2021-07-13 19:33:32,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:32,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:32,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:32,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:32,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835117930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:32,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:32,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:32,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368969982] [2021-07-13 19:33:32,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:32,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:32,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:32,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:32,937 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) [2021-07-13 19:33:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:33,291 INFO L93 Difference]: Finished difference Result 252 states and 557 transitions. [2021-07-13 19:33:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:33:33,291 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 [2021-07-13 19:33:33,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:33,291 INFO L225 Difference]: With dead ends: 252 [2021-07-13 19:33:33,291 INFO L226 Difference]: Without dead ends: 252 [2021-07-13 19:33:33,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 429.3ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:33:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-13 19:33:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 215. [2021-07-13 19:33:33,293 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) [2021-07-13 19:33:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-07-13 19:33:33,294 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-07-13 19:33:33,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:33,294 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-07-13 19:33:33,294 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) [2021-07-13 19:33:33,294 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-07-13 19:33:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:33,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:33,294 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:33,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2480,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:33,495 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:33,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:33,495 INFO L82 PathProgramCache]: Analyzing trace with hash -63359793, now seen corresponding path program 321 times [2021-07-13 19:33:33,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:33,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452208209] [2021-07-13 19:33:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:33,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:33,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452208209] [2021-07-13 19:33:33,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452208209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:33,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855476811] [2021-07-13 19:33:33,591 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 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 [2021-07-13 19:33:33,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:33:33,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:33,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:33,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855476811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:33,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:33,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:33,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337255000] [2021-07-13 19:33:33,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:33,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:33,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:33,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:33,795 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) [2021-07-13 19:33:34,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:34,254 INFO L93 Difference]: Finished difference Result 263 states and 576 transitions. [2021-07-13 19:33:34,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:33:34,255 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 [2021-07-13 19:33:34,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:34,255 INFO L225 Difference]: With dead ends: 263 [2021-07-13 19:33:34,255 INFO L226 Difference]: Without dead ends: 260 [2021-07-13 19:33:34,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 522.6ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:33:34,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-13 19:33:34,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 216. [2021-07-13 19:33:34,257 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) [2021-07-13 19:33:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 486 transitions. [2021-07-13 19:33:34,257 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 486 transitions. Word has length 19 [2021-07-13 19:33:34,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:34,257 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 486 transitions. [2021-07-13 19:33:34,257 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) [2021-07-13 19:33:34,258 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 486 transitions. [2021-07-13 19:33:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:34,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:34,258 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:34,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2485 [2021-07-13 19:33:34,458 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:34,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:34,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1064036300, now seen corresponding path program 322 times [2021-07-13 19:33:34,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:34,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566290005] [2021-07-13 19:33:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:34,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:34,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566290005] [2021-07-13 19:33:34,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566290005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:34,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096610041] [2021-07-13 19:33:34,553 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 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 [2021-07-13 19:33:34,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:34,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:34,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:34,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:34,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096610041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:34,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:34,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:34,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814268805] [2021-07-13 19:33:34,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:34,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:34,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:34,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:34,793 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) [2021-07-13 19:33:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:35,206 INFO L93 Difference]: Finished difference Result 265 states and 576 transitions. [2021-07-13 19:33:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:33:35,206 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 [2021-07-13 19:33:35,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:35,207 INFO L225 Difference]: With dead ends: 265 [2021-07-13 19:33:35,207 INFO L226 Difference]: Without dead ends: 265 [2021-07-13 19:33:35,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 496.6ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:33:35,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-13 19:33:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 214. [2021-07-13 19:33:35,209 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) [2021-07-13 19:33:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-07-13 19:33:35,209 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-07-13 19:33:35,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:35,209 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-07-13 19:33:35,209 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) [2021-07-13 19:33:35,209 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-07-13 19:33:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:35,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:35,210 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:35,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2492,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:35,410 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:35,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:35,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1951736813, now seen corresponding path program 323 times [2021-07-13 19:33:35,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:35,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274201052] [2021-07-13 19:33:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:35,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:35,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274201052] [2021-07-13 19:33:35,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274201052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:35,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146934846] [2021-07-13 19:33:35,529 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 [2021-07-13 19:33:35,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:33:35,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:35,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:35,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:35,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146934846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:35,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:35,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:35,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069461527] [2021-07-13 19:33:35,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:35,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:35,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:35,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:35,726 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) [2021-07-13 19:33:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:35,938 INFO L93 Difference]: Finished difference Result 239 states and 531 transitions. [2021-07-13 19:33:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:33:35,938 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 [2021-07-13 19:33:35,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:35,939 INFO L225 Difference]: With dead ends: 239 [2021-07-13 19:33:35,939 INFO L226 Difference]: Without dead ends: 239 [2021-07-13 19:33:35,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 300.9ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:33:35,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-07-13 19:33:35,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 214. [2021-07-13 19:33:35,941 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) [2021-07-13 19:33:35,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-07-13 19:33:35,941 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-07-13 19:33:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:35,941 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-07-13 19:33:35,941 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) [2021-07-13 19:33:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-07-13 19:33:35,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:35,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:35,941 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:36,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2500 [2021-07-13 19:33:36,142 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:36,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:36,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1546494731, now seen corresponding path program 324 times [2021-07-13 19:33:36,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:36,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420644676] [2021-07-13 19:33:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:36,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:36,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420644676] [2021-07-13 19:33:36,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420644676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:36,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945433340] [2021-07-13 19:33:36,255 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 [2021-07-13 19:33:36,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:33:36,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:36,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:33:36,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:36,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945433340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:36,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:36,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:36,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558490948] [2021-07-13 19:33:36,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:36,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:36,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:36,470 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) [2021-07-13 19:33:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:36,818 INFO L93 Difference]: Finished difference Result 251 states and 555 transitions. [2021-07-13 19:33:36,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:36,819 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 [2021-07-13 19:33:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:36,819 INFO L225 Difference]: With dead ends: 251 [2021-07-13 19:33:36,819 INFO L226 Difference]: Without dead ends: 251 [2021-07-13 19:33:36,819 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 [2021-07-13 19:33:36,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-13 19:33:36,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 214. [2021-07-13 19:33:36,821 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) [2021-07-13 19:33:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-07-13 19:33:36,821 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-07-13 19:33:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:36,821 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-07-13 19:33:36,821 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) [2021-07-13 19:33:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-07-13 19:33:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:36,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:36,822 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:37,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2505,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:37,022 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:37,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:37,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1258944496, now seen corresponding path program 325 times [2021-07-13 19:33:37,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:37,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272156697] [2021-07-13 19:33:37,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:37,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:37,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272156697] [2021-07-13 19:33:37,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272156697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:37,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316688840] [2021-07-13 19:33:37,137 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 [2021-07-13 19:33:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:37,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:37,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:37,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316688840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:37,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:37,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:37,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947687315] [2021-07-13 19:33:37,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:37,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:37,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:37,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:37,363 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) [2021-07-13 19:33:37,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:37,597 INFO L93 Difference]: Finished difference Result 234 states and 520 transitions. [2021-07-13 19:33:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:33:37,597 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 [2021-07-13 19:33:37,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:37,598 INFO L225 Difference]: With dead ends: 234 [2021-07-13 19:33:37,598 INFO L226 Difference]: Without dead ends: 234 [2021-07-13 19:33:37,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 392.9ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:33:37,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-13 19:33:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 211. [2021-07-13 19:33:37,599 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) [2021-07-13 19:33:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-07-13 19:33:37,600 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-07-13 19:33:37,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:37,600 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-07-13 19:33:37,600 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) [2021-07-13 19:33:37,600 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-07-13 19:33:37,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:37,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:37,600 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:37,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2513 [2021-07-13 19:33:37,801 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:37,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:37,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1040148465, now seen corresponding path program 326 times [2021-07-13 19:33:37,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:37,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346556379] [2021-07-13 19:33:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:37,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:37,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346556379] [2021-07-13 19:33:37,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346556379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:37,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834054452] [2021-07-13 19:33:37,915 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 [2021-07-13 19:33:37,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:37,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:37,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:37,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:38,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834054452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:38,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:38,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:38,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477213982] [2021-07-13 19:33:38,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:38,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:38,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:38,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:38,170 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) [2021-07-13 19:33:38,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:38,372 INFO L93 Difference]: Finished difference Result 245 states and 534 transitions. [2021-07-13 19:33:38,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:38,373 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 [2021-07-13 19:33:38,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:38,373 INFO L225 Difference]: With dead ends: 245 [2021-07-13 19:33:38,373 INFO L226 Difference]: Without dead ends: 245 [2021-07-13 19:33:38,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:33:38,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-13 19:33:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 213. [2021-07-13 19:33:38,375 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) [2021-07-13 19:33:38,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 478 transitions. [2021-07-13 19:33:38,375 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 478 transitions. Word has length 19 [2021-07-13 19:33:38,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:38,375 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 478 transitions. [2021-07-13 19:33:38,376 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) [2021-07-13 19:33:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 478 transitions. [2021-07-13 19:33:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:38,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:38,376 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:38,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2521 [2021-07-13 19:33:38,576 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:38,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:38,577 INFO L82 PathProgramCache]: Analyzing trace with hash -752598230, now seen corresponding path program 327 times [2021-07-13 19:33:38,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:38,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964032379] [2021-07-13 19:33:38,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:38,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:38,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964032379] [2021-07-13 19:33:38,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964032379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:38,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191646187] [2021-07-13 19:33:38,692 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 [2021-07-13 19:33:38,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:33:38,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:38,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:38,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:38,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191646187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:38,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:38,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:38,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657222520] [2021-07-13 19:33:38,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:38,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:38,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:38,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:38,888 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) [2021-07-13 19:33:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:39,168 INFO L93 Difference]: Finished difference Result 304 states and 644 transitions. [2021-07-13 19:33:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:33:39,168 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 [2021-07-13 19:33:39,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:39,169 INFO L225 Difference]: With dead ends: 304 [2021-07-13 19:33:39,169 INFO L226 Difference]: Without dead ends: 304 [2021-07-13 19:33:39,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 347.9ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:33:39,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-07-13 19:33:39,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 214. [2021-07-13 19:33:39,171 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) [2021-07-13 19:33:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 483 transitions. [2021-07-13 19:33:39,171 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 483 transitions. Word has length 19 [2021-07-13 19:33:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:39,171 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 483 transitions. [2021-07-13 19:33:39,171 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) [2021-07-13 19:33:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 483 transitions. [2021-07-13 19:33:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:39,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:39,172 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:39,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:39,372 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:39,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:39,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1582333741, now seen corresponding path program 328 times [2021-07-13 19:33:39,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:39,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935976642] [2021-07-13 19:33:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:39,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:39,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935976642] [2021-07-13 19:33:39,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935976642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:39,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005218773] [2021-07-13 19:33:39,481 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 [2021-07-13 19:33:39,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:39,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:39,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:39,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:39,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005218773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:39,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:39,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:39,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983431395] [2021-07-13 19:33:39,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:39,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:39,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:39,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:39,747 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) [2021-07-13 19:33:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:39,905 INFO L93 Difference]: Finished difference Result 232 states and 514 transitions. [2021-07-13 19:33:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:33:39,906 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 [2021-07-13 19:33:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:39,906 INFO L225 Difference]: With dead ends: 232 [2021-07-13 19:33:39,906 INFO L226 Difference]: Without dead ends: 226 [2021-07-13 19:33:39,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 346.3ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:33:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-13 19:33:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 214. [2021-07-13 19:33:39,908 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) [2021-07-13 19:33:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 482 transitions. [2021-07-13 19:33:39,908 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 482 transitions. Word has length 19 [2021-07-13 19:33:39,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:39,908 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 482 transitions. [2021-07-13 19:33:39,908 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) [2021-07-13 19:33:39,908 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 482 transitions. [2021-07-13 19:33:39,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:39,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:39,909 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:40,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2536 [2021-07-13 19:33:40,109 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:40,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:40,110 INFO L82 PathProgramCache]: Analyzing trace with hash -450607950, now seen corresponding path program 329 times [2021-07-13 19:33:40,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:40,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835121762] [2021-07-13 19:33:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:40,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:40,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835121762] [2021-07-13 19:33:40,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835121762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:40,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755305495] [2021-07-13 19:33:40,229 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 [2021-07-13 19:33:40,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:33:40,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:40,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:40,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:40,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755305495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:40,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:40,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:40,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538501796] [2021-07-13 19:33:40,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:40,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:40,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:40,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:40,423 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) [2021-07-13 19:33:40,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:40,605 INFO L93 Difference]: Finished difference Result 248 states and 548 transitions. [2021-07-13 19:33:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:40,605 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 [2021-07-13 19:33:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:40,605 INFO L225 Difference]: With dead ends: 248 [2021-07-13 19:33:40,605 INFO L226 Difference]: Without dead ends: 248 [2021-07-13 19:33:40,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:33:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-13 19:33:40,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 210. [2021-07-13 19:33:40,607 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) [2021-07-13 19:33:40,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-07-13 19:33:40,608 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-07-13 19:33:40,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:40,608 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-07-13 19:33:40,608 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) [2021-07-13 19:33:40,608 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-07-13 19:33:40,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:40,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:40,608 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:40,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2544 [2021-07-13 19:33:40,824 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1075773305, now seen corresponding path program 330 times [2021-07-13 19:33:40,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:40,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191627517] [2021-07-13 19:33:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:40,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:40,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191627517] [2021-07-13 19:33:40,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191627517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:40,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202089851] [2021-07-13 19:33:40,946 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 [2021-07-13 19:33:40,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:33:40,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:40,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:40,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:41,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202089851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:41,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:41,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:41,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851193772] [2021-07-13 19:33:41,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:41,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:41,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:41,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:41,148 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) [2021-07-13 19:33:41,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:41,342 INFO L93 Difference]: Finished difference Result 242 states and 535 transitions. [2021-07-13 19:33:41,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:41,342 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 [2021-07-13 19:33:41,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:41,343 INFO L225 Difference]: With dead ends: 242 [2021-07-13 19:33:41,343 INFO L226 Difference]: Without dead ends: 242 [2021-07-13 19:33:41,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:33:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-13 19:33:41,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 211. [2021-07-13 19:33:41,345 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) [2021-07-13 19:33:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-07-13 19:33:41,345 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-07-13 19:33:41,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:41,345 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-07-13 19:33:41,345 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) [2021-07-13 19:33:41,345 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-07-13 19:33:41,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:41,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:41,346 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:41,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2549 [2021-07-13 19:33:41,546 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:41,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:41,546 INFO L82 PathProgramCache]: Analyzing trace with hash -279037553, now seen corresponding path program 331 times [2021-07-13 19:33:41,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:41,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131597952] [2021-07-13 19:33:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:41,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:41,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131597952] [2021-07-13 19:33:41,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131597952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:41,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9908396] [2021-07-13 19:33:41,661 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 [2021-07-13 19:33:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:41,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:41,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:41,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9908396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:41,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:41,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:41,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441966241] [2021-07-13 19:33:41,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:41,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:41,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:41,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:41,859 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) [2021-07-13 19:33:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:42,138 INFO L93 Difference]: Finished difference Result 258 states and 564 transitions. [2021-07-13 19:33:42,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:33:42,138 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 [2021-07-13 19:33:42,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:42,138 INFO L225 Difference]: With dead ends: 258 [2021-07-13 19:33:42,138 INFO L226 Difference]: Without dead ends: 255 [2021-07-13 19:33:42,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 347.9ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:33:42,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-13 19:33:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 212. [2021-07-13 19:33:42,140 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) [2021-07-13 19:33:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 476 transitions. [2021-07-13 19:33:42,141 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 476 transitions. Word has length 19 [2021-07-13 19:33:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:42,141 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 476 transitions. [2021-07-13 19:33:42,141 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) [2021-07-13 19:33:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 476 transitions. [2021-07-13 19:33:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:42,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:42,141 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:42,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2554 [2021-07-13 19:33:42,342 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:42,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:42,342 INFO L82 PathProgramCache]: Analyzing trace with hash 848358540, now seen corresponding path program 332 times [2021-07-13 19:33:42,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:42,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501431575] [2021-07-13 19:33:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:42,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:42,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501431575] [2021-07-13 19:33:42,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501431575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:42,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159419942] [2021-07-13 19:33:42,453 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 [2021-07-13 19:33:42,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:42,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:42,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:42,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:42,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159419942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:42,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:42,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:42,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587950869] [2021-07-13 19:33:42,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:42,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:42,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:42,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:42,684 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) [2021-07-13 19:33:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:43,331 INFO L93 Difference]: Finished difference Result 349 states and 723 transitions. [2021-07-13 19:33:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:33:43,332 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 [2021-07-13 19:33:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:43,332 INFO L225 Difference]: With dead ends: 349 [2021-07-13 19:33:43,332 INFO L226 Difference]: Without dead ends: 349 [2021-07-13 19:33:43,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 734.3ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:33:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-07-13 19:33:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 216. [2021-07-13 19:33:43,334 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) [2021-07-13 19:33:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 491 transitions. [2021-07-13 19:33:43,335 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 491 transitions. Word has length 19 [2021-07-13 19:33:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:43,335 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 491 transitions. [2021-07-13 19:33:43,335 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) [2021-07-13 19:33:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 491 transitions. [2021-07-13 19:33:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:43,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:43,335 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:43,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2561,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:43,536 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:43,536 INFO L82 PathProgramCache]: Analyzing trace with hash 227308713, now seen corresponding path program 333 times [2021-07-13 19:33:43,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:43,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005522071] [2021-07-13 19:33:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:43,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:43,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005522071] [2021-07-13 19:33:43,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005522071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:43,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867537174] [2021-07-13 19:33:43,657 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 [2021-07-13 19:33:43,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:33:43,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:43,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:43,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:43,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867537174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:43,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:43,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:43,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053978298] [2021-07-13 19:33:43,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:43,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:43,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:43,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:43,917 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) [2021-07-13 19:33:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:44,288 INFO L93 Difference]: Finished difference Result 239 states and 532 transitions. [2021-07-13 19:33:44,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:33:44,288 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 [2021-07-13 19:33:44,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:44,288 INFO L225 Difference]: With dead ends: 239 [2021-07-13 19:33:44,288 INFO L226 Difference]: Without dead ends: 233 [2021-07-13 19:33:44,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 503.0ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:33:44,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-07-13 19:33:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2021-07-13 19:33:44,290 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) [2021-07-13 19:33:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 490 transitions. [2021-07-13 19:33:44,291 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 490 transitions. Word has length 19 [2021-07-13 19:33:44,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:44,291 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 490 transitions. [2021-07-13 19:33:44,291 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) [2021-07-13 19:33:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 490 transitions. [2021-07-13 19:33:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:44,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:44,291 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:44,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2569,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:44,492 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:44,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:44,492 INFO L82 PathProgramCache]: Analyzing trace with hash 514858948, now seen corresponding path program 334 times [2021-07-13 19:33:44,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:44,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829592138] [2021-07-13 19:33:44,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:44,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:44,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829592138] [2021-07-13 19:33:44,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829592138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:44,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749610500] [2021-07-13 19:33:44,604 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 [2021-07-13 19:33:44,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:44,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:44,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:44,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:44,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749610500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:44,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:44,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:44,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791722253] [2021-07-13 19:33:44,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:44,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:44,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:44,800 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) [2021-07-13 19:33:45,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:45,209 INFO L93 Difference]: Finished difference Result 293 states and 629 transitions. [2021-07-13 19:33:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:33:45,210 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 [2021-07-13 19:33:45,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:45,210 INFO L225 Difference]: With dead ends: 293 [2021-07-13 19:33:45,210 INFO L226 Difference]: Without dead ends: 293 [2021-07-13 19:33:45,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 470.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:33:45,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-07-13 19:33:45,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 213. [2021-07-13 19:33:45,213 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) [2021-07-13 19:33:45,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-07-13 19:33:45,213 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-07-13 19:33:45,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:45,213 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-07-13 19:33:45,213 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) [2021-07-13 19:33:45,213 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-07-13 19:33:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:45,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:45,213 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:45,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2577 [2021-07-13 19:33:45,414 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:45,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:45,414 INFO L82 PathProgramCache]: Analyzing trace with hash 816849228, now seen corresponding path program 335 times [2021-07-13 19:33:45,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:45,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122679758] [2021-07-13 19:33:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:45,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:45,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122679758] [2021-07-13 19:33:45,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122679758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:45,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260081176] [2021-07-13 19:33:45,538 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 [2021-07-13 19:33:45,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:33:45,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:45,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:45,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:45,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260081176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:45,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:45,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:45,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802851755] [2021-07-13 19:33:45,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:45,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:45,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:45,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:45,734 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) [2021-07-13 19:33:45,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:45,983 INFO L93 Difference]: Finished difference Result 250 states and 552 transitions. [2021-07-13 19:33:45,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:33:45,983 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 [2021-07-13 19:33:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:45,983 INFO L225 Difference]: With dead ends: 250 [2021-07-13 19:33:45,983 INFO L226 Difference]: Without dead ends: 250 [2021-07-13 19:33:45,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 330.7ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:33:45,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-07-13 19:33:45,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 210. [2021-07-13 19:33:45,985 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) [2021-07-13 19:33:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-07-13 19:33:45,986 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-07-13 19:33:45,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:45,986 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-07-13 19:33:45,986 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) [2021-07-13 19:33:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-07-13 19:33:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:45,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:45,986 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:46,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2584,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:46,187 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:46,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:46,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1255826225, now seen corresponding path program 336 times [2021-07-13 19:33:46,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:46,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227605824] [2021-07-13 19:33:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:46,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:46,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227605824] [2021-07-13 19:33:46,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227605824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:46,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379706531] [2021-07-13 19:33:46,283 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 [2021-07-13 19:33:46,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:33:46,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:46,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:46,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:46,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379706531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:46,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:46,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:46,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358365315] [2021-07-13 19:33:46,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:46,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:46,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:46,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:46,562 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) [2021-07-13 19:33:46,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:46,922 INFO L93 Difference]: Finished difference Result 251 states and 546 transitions. [2021-07-13 19:33:46,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:33:46,922 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 [2021-07-13 19:33:46,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:46,923 INFO L225 Difference]: With dead ends: 251 [2021-07-13 19:33:46,923 INFO L226 Difference]: Without dead ends: 251 [2021-07-13 19:33:46,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 484.0ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:33:46,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-13 19:33:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 213. [2021-07-13 19:33:46,925 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) [2021-07-13 19:33:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 479 transitions. [2021-07-13 19:33:46,925 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 479 transitions. Word has length 19 [2021-07-13 19:33:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:46,925 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 479 transitions. [2021-07-13 19:33:46,925 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) [2021-07-13 19:33:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 479 transitions. [2021-07-13 19:33:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:46,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:46,926 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:47,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2589 [2021-07-13 19:33:47,133 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:47,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:47,133 INFO L82 PathProgramCache]: Analyzing trace with hash -968275990, now seen corresponding path program 337 times [2021-07-13 19:33:47,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:47,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236314162] [2021-07-13 19:33:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:47,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:47,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236314162] [2021-07-13 19:33:47,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236314162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:47,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697771115] [2021-07-13 19:33:47,226 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 [2021-07-13 19:33:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:47,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:47,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:47,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697771115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:47,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:47,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:47,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144355950] [2021-07-13 19:33:47,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:47,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:47,429 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) [2021-07-13 19:33:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:48,037 INFO L93 Difference]: Finished difference Result 303 states and 647 transitions. [2021-07-13 19:33:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:33:48,037 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 [2021-07-13 19:33:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:48,038 INFO L225 Difference]: With dead ends: 303 [2021-07-13 19:33:48,038 INFO L226 Difference]: Without dead ends: 303 [2021-07-13 19:33:48,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 570.0ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:33:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-07-13 19:33:48,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 215. [2021-07-13 19:33:48,040 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) [2021-07-13 19:33:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 487 transitions. [2021-07-13 19:33:48,040 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 487 transitions. Word has length 19 [2021-07-13 19:33:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:48,040 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 487 transitions. [2021-07-13 19:33:48,041 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) [2021-07-13 19:33:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 487 transitions. [2021-07-13 19:33:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:48,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:48,041 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:48,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2597 [2021-07-13 19:33:48,241 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:48,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:48,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1366655981, now seen corresponding path program 338 times [2021-07-13 19:33:48,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:48,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032109189] [2021-07-13 19:33:48,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:48,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:48,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032109189] [2021-07-13 19:33:48,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032109189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:48,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461094375] [2021-07-13 19:33:48,336 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 [2021-07-13 19:33:48,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:48,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:48,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:48,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:48,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461094375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:48,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:48,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:48,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773418382] [2021-07-13 19:33:48,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:48,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:48,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:48,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:48,613 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) [2021-07-13 19:33:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:48,961 INFO L93 Difference]: Finished difference Result 239 states and 529 transitions. [2021-07-13 19:33:48,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:33:48,961 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 [2021-07-13 19:33:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:48,961 INFO L225 Difference]: With dead ends: 239 [2021-07-13 19:33:48,961 INFO L226 Difference]: Without dead ends: 230 [2021-07-13 19:33:48,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 487.3ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:33:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-13 19:33:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 215. [2021-07-13 19:33:48,963 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) [2021-07-13 19:33:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 485 transitions. [2021-07-13 19:33:48,963 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 485 transitions. Word has length 19 [2021-07-13 19:33:48,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:48,963 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 485 transitions. [2021-07-13 19:33:48,963 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) [2021-07-13 19:33:48,963 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 485 transitions. [2021-07-13 19:33:48,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:48,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:48,964 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:49,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2604,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:49,164 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:49,165 INFO L82 PathProgramCache]: Analyzing trace with hash -666285710, now seen corresponding path program 339 times [2021-07-13 19:33:49,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:49,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060976225] [2021-07-13 19:33:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:49,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:49,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060976225] [2021-07-13 19:33:49,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060976225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:49,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420889334] [2021-07-13 19:33:49,266 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 [2021-07-13 19:33:49,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:33:49,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:49,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:49,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:49,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420889334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:49,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:49,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:49,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187367760] [2021-07-13 19:33:49,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:49,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:49,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:49,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:49,474 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) [2021-07-13 19:33:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:49,912 INFO L93 Difference]: Finished difference Result 258 states and 569 transitions. [2021-07-13 19:33:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:33:49,912 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 [2021-07-13 19:33:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:49,912 INFO L225 Difference]: With dead ends: 258 [2021-07-13 19:33:49,912 INFO L226 Difference]: Without dead ends: 258 [2021-07-13 19:33:49,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 477.4ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:33:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-13 19:33:49,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 214. [2021-07-13 19:33:49,914 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) [2021-07-13 19:33:49,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 483 transitions. [2021-07-13 19:33:49,915 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 483 transitions. Word has length 19 [2021-07-13 19:33:49,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:49,915 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 483 transitions. [2021-07-13 19:33:49,915 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) [2021-07-13 19:33:49,915 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 483 transitions. [2021-07-13 19:33:49,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:49,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:49,915 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:50,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2612 [2021-07-13 19:33:50,116 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:50,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:50,116 INFO L82 PathProgramCache]: Analyzing trace with hash -159939444, now seen corresponding path program 340 times [2021-07-13 19:33:50,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:50,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228107872] [2021-07-13 19:33:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:50,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:50,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228107872] [2021-07-13 19:33:50,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228107872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:50,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772478416] [2021-07-13 19:33:50,219 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 [2021-07-13 19:33:50,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:50,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:50,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:50,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:50,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772478416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:50,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:50,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:50,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661662983] [2021-07-13 19:33:50,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:50,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:50,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:50,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:50,413 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) [2021-07-13 19:33:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:50,646 INFO L93 Difference]: Finished difference Result 246 states and 543 transitions. [2021-07-13 19:33:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:50,647 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 [2021-07-13 19:33:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:50,647 INFO L225 Difference]: With dead ends: 246 [2021-07-13 19:33:50,647 INFO L226 Difference]: Without dead ends: 246 [2021-07-13 19:33:50,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:33:50,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-13 19:33:50,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 210. [2021-07-13 19:33:50,649 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) [2021-07-13 19:33:50,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-07-13 19:33:50,649 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-07-13 19:33:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:50,649 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-07-13 19:33:50,649 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) [2021-07-13 19:33:50,649 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-07-13 19:33:50,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:50,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:50,650 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:50,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2617,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:50,866 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:50,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:50,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1533464087, now seen corresponding path program 341 times [2021-07-13 19:33:50,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:50,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490221960] [2021-07-13 19:33:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:50,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:50,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490221960] [2021-07-13 19:33:50,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490221960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:50,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90298847] [2021-07-13 19:33:50,962 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 [2021-07-13 19:33:50,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:33:50,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:50,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:50,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:51,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90298847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:51,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:51,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:51,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940115071] [2021-07-13 19:33:51,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:51,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:51,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:51,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:51,170 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) [2021-07-13 19:33:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:51,318 INFO L93 Difference]: Finished difference Result 232 states and 515 transitions. [2021-07-13 19:33:51,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:51,318 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 [2021-07-13 19:33:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:51,319 INFO L225 Difference]: With dead ends: 232 [2021-07-13 19:33:51,319 INFO L226 Difference]: Without dead ends: 232 [2021-07-13 19:33:51,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:51,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-13 19:33:51,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 210. [2021-07-13 19:33:51,321 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) [2021-07-13 19:33:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-07-13 19:33:51,321 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-07-13 19:33:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:51,321 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-07-13 19:33:51,321 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) [2021-07-13 19:33:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-07-13 19:33:51,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:51,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:51,322 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:51,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2622,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:51,522 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:51,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:51,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1690507745, now seen corresponding path program 342 times [2021-07-13 19:33:51,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:51,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422585072] [2021-07-13 19:33:51,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:51,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:51,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422585072] [2021-07-13 19:33:51,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422585072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:51,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444432221] [2021-07-13 19:33:51,619 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 [2021-07-13 19:33:51,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:33:51,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:51,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:33:51,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:51,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444432221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:51,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:51,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:51,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100493764] [2021-07-13 19:33:51,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:51,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:51,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:51,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:51,832 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) [2021-07-13 19:33:52,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:52,207 INFO L93 Difference]: Finished difference Result 247 states and 545 transitions. [2021-07-13 19:33:52,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:52,208 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 [2021-07-13 19:33:52,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:52,208 INFO L225 Difference]: With dead ends: 247 [2021-07-13 19:33:52,208 INFO L226 Difference]: Without dead ends: 247 [2021-07-13 19:33:52,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 437.0ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:33:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-13 19:33:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 210. [2021-07-13 19:33:52,210 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) [2021-07-13 19:33:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-07-13 19:33:52,210 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-07-13 19:33:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:52,210 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-07-13 19:33:52,211 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) [2021-07-13 19:33:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-07-13 19:33:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:52,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:52,211 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:52,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2627,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:52,411 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:52,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:52,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1807723799, now seen corresponding path program 343 times [2021-07-13 19:33:52,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:52,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557023734] [2021-07-13 19:33:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:52,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:52,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557023734] [2021-07-13 19:33:52,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557023734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:52,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913178200] [2021-07-13 19:33:52,512 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 [2021-07-13 19:33:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:52,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:52,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:52,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913178200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:52,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:52,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:52,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72393220] [2021-07-13 19:33:52,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:52,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:52,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:52,717 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) [2021-07-13 19:33:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:53,138 INFO L93 Difference]: Finished difference Result 262 states and 570 transitions. [2021-07-13 19:33:53,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:33:53,138 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 [2021-07-13 19:33:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:53,139 INFO L225 Difference]: With dead ends: 262 [2021-07-13 19:33:53,139 INFO L226 Difference]: Without dead ends: 259 [2021-07-13 19:33:53,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 460.2ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:33:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-07-13 19:33:53,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 210. [2021-07-13 19:33:53,141 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) [2021-07-13 19:33:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-07-13 19:33:53,141 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-07-13 19:33:53,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:53,141 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-07-13 19:33:53,141 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) [2021-07-13 19:33:53,141 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-07-13 19:33:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:53,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:53,142 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:53,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2632,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:53,342 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:53,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:53,342 INFO L82 PathProgramCache]: Analyzing trace with hash -680327706, now seen corresponding path program 344 times [2021-07-13 19:33:53,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:53,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604045416] [2021-07-13 19:33:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:53,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:53,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604045416] [2021-07-13 19:33:53,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604045416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:53,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480472255] [2021-07-13 19:33:53,437 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 [2021-07-13 19:33:53,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:53,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:53,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:53,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480472255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:53,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:53,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:53,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060273524] [2021-07-13 19:33:53,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:53,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:53,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:53,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:53,689 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) [2021-07-13 19:33:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:53,928 INFO L93 Difference]: Finished difference Result 238 states and 522 transitions. [2021-07-13 19:33:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:33:53,928 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 [2021-07-13 19:33:53,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:53,929 INFO L225 Difference]: With dead ends: 238 [2021-07-13 19:33:53,929 INFO L226 Difference]: Without dead ends: 236 [2021-07-13 19:33:53,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:33:53,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-13 19:33:53,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 206. [2021-07-13 19:33:53,931 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) [2021-07-13 19:33:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-07-13 19:33:53,931 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-07-13 19:33:53,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:53,931 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-07-13 19:33:53,931 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) [2021-07-13 19:33:53,931 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-07-13 19:33:53,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:53,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:53,931 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:54,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2639 [2021-07-13 19:33:54,132 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:54,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:54,132 INFO L82 PathProgramCache]: Analyzing trace with hash 207372807, now seen corresponding path program 345 times [2021-07-13 19:33:54,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:54,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558195136] [2021-07-13 19:33:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:54,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:54,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558195136] [2021-07-13 19:33:54,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558195136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:54,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173433337] [2021-07-13 19:33:54,256 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 [2021-07-13 19:33:54,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:33:54,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:54,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:54,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:54,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173433337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:54,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:54,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:54,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051113222] [2021-07-13 19:33:54,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:54,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:54,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:54,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:54,459 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) [2021-07-13 19:33:54,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:54,666 INFO L93 Difference]: Finished difference Result 235 states and 517 transitions. [2021-07-13 19:33:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:54,666 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 [2021-07-13 19:33:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:54,667 INFO L225 Difference]: With dead ends: 235 [2021-07-13 19:33:54,667 INFO L226 Difference]: Without dead ends: 235 [2021-07-13 19:33:54,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 294.6ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:33:54,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-13 19:33:54,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-07-13 19:33:54,669 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) [2021-07-13 19:33:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-07-13 19:33:54,669 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-07-13 19:33:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:54,669 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-07-13 19:33:54,669 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) [2021-07-13 19:33:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-07-13 19:33:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:54,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:54,669 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:54,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2647,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:54,870 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:54,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:54,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1004108559, now seen corresponding path program 346 times [2021-07-13 19:33:54,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:54,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716669058] [2021-07-13 19:33:54,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:54,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:54,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716669058] [2021-07-13 19:33:54,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716669058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:54,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598833927] [2021-07-13 19:33:54,988 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 [2021-07-13 19:33:55,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:33:55,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:55,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:55,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:55,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598833927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:55,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:55,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:55,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372196218] [2021-07-13 19:33:55,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:55,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:55,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:55,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:55,187 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) [2021-07-13 19:33:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:55,552 INFO L93 Difference]: Finished difference Result 258 states and 560 transitions. [2021-07-13 19:33:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:33:55,552 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 [2021-07-13 19:33:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:55,553 INFO L225 Difference]: With dead ends: 258 [2021-07-13 19:33:55,553 INFO L226 Difference]: Without dead ends: 255 [2021-07-13 19:33:55,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:33:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-13 19:33:55,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 209. [2021-07-13 19:33:55,555 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) [2021-07-13 19:33:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-07-13 19:33:55,555 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-07-13 19:33:55,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:55,555 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-07-13 19:33:55,555 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) [2021-07-13 19:33:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-07-13 19:33:55,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:55,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:55,555 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:55,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2652 [2021-07-13 19:33:55,756 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:55,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:55,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2131504652, now seen corresponding path program 347 times [2021-07-13 19:33:55,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:55,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612862589] [2021-07-13 19:33:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:55,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:55,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612862589] [2021-07-13 19:33:55,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612862589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:55,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683326016] [2021-07-13 19:33:55,881 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 [2021-07-13 19:33:55,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:33:55,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:55,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:55,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:56,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683326016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:56,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:56,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:56,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636551428] [2021-07-13 19:33:56,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:56,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:56,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:56,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:56,115 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) [2021-07-13 19:33:56,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:56,819 INFO L93 Difference]: Finished difference Result 343 states and 704 transitions. [2021-07-13 19:33:56,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:33:56,820 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 [2021-07-13 19:33:56,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:56,820 INFO L225 Difference]: With dead ends: 343 [2021-07-13 19:33:56,820 INFO L226 Difference]: Without dead ends: 341 [2021-07-13 19:33:56,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 791.9ms TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:33:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-07-13 19:33:56,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 213. [2021-07-13 19:33:56,822 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) [2021-07-13 19:33:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-07-13 19:33:56,823 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-07-13 19:33:56,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:56,823 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-07-13 19:33:56,823 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) [2021-07-13 19:33:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-07-13 19:33:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:56,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:56,823 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:57,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2659,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:57,024 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:57,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1510454825, now seen corresponding path program 348 times [2021-07-13 19:33:57,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:57,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300360960] [2021-07-13 19:33:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:57,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:57,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300360960] [2021-07-13 19:33:57,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300360960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:57,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165682099] [2021-07-13 19:33:57,143 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 [2021-07-13 19:33:57,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:33:57,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:57,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:57,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:57,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165682099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:57,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:57,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:57,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849525126] [2021-07-13 19:33:57,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:57,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:57,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:57,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:57,404 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) [2021-07-13 19:33:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:57,601 INFO L93 Difference]: Finished difference Result 234 states and 522 transitions. [2021-07-13 19:33:57,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:33:57,601 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 [2021-07-13 19:33:57,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:57,602 INFO L225 Difference]: With dead ends: 234 [2021-07-13 19:33:57,602 INFO L226 Difference]: Without dead ends: 234 [2021-07-13 19:33:57,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:33:57,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-13 19:33:57,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 213. [2021-07-13 19:33:57,604 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) [2021-07-13 19:33:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-07-13 19:33:57,604 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-07-13 19:33:57,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:57,604 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-07-13 19:33:57,604 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) [2021-07-13 19:33:57,604 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-07-13 19:33:57,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:57,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:57,604 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:57,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2667,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:57,805 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:57,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1798005060, now seen corresponding path program 349 times [2021-07-13 19:33:57,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:57,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147732424] [2021-07-13 19:33:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:57,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:57,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147732424] [2021-07-13 19:33:57,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147732424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:57,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070783626] [2021-07-13 19:33:57,922 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 [2021-07-13 19:33:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:57,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:33:57,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:58,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070783626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:58,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:58,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:58,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734567715] [2021-07-13 19:33:58,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:58,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:58,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:58,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:58,196 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) [2021-07-13 19:33:58,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:58,569 INFO L93 Difference]: Finished difference Result 277 states and 597 transitions. [2021-07-13 19:33:58,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:33:58,569 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 [2021-07-13 19:33:58,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:58,569 INFO L225 Difference]: With dead ends: 277 [2021-07-13 19:33:58,569 INFO L226 Difference]: Without dead ends: 277 [2021-07-13 19:33:58,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 530.8ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:33:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-13 19:33:58,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 210. [2021-07-13 19:33:58,571 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) [2021-07-13 19:33:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-07-13 19:33:58,572 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-07-13 19:33:58,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:58,572 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-07-13 19:33:58,572 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) [2021-07-13 19:33:58,572 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-07-13 19:33:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:58,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:58,572 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:58,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2675 [2021-07-13 19:33:58,773 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:58,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:58,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2099995340, now seen corresponding path program 350 times [2021-07-13 19:33:58,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:58,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13261610] [2021-07-13 19:33:58,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:58,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:58,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13261610] [2021-07-13 19:33:58,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13261610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:58,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209233191] [2021-07-13 19:33:58,888 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 [2021-07-13 19:33:58,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:58,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:58,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:33:58,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:59,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209233191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:59,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:59,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:33:59,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436614599] [2021-07-13 19:33:59,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:33:59,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:59,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:33:59,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:33:59,087 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) [2021-07-13 19:33:59,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:59,261 INFO L93 Difference]: Finished difference Result 248 states and 543 transitions. [2021-07-13 19:33:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:33:59,261 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 [2021-07-13 19:33:59,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:59,262 INFO L225 Difference]: With dead ends: 248 [2021-07-13 19:33:59,262 INFO L226 Difference]: Without dead ends: 248 [2021-07-13 19:33:59,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:33:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-13 19:33:59,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 205. [2021-07-13 19:33:59,264 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) [2021-07-13 19:33:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 457 transitions. [2021-07-13 19:33:59,264 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 457 transitions. Word has length 19 [2021-07-13 19:33:59,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:59,264 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 457 transitions. [2021-07-13 19:33:59,264 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) [2021-07-13 19:33:59,264 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 457 transitions. [2021-07-13 19:33:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:59,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:59,264 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:59,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2681,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:33:59,465 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:59,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1474829985, now seen corresponding path program 351 times [2021-07-13 19:33:59,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:59,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34050261] [2021-07-13 19:33:59,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:59,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:59,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34050261] [2021-07-13 19:33:59,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34050261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:59,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771496295] [2021-07-13 19:33:59,582 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 [2021-07-13 19:33:59,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:33:59,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:59,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:33:59,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:59,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771496295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:59,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:59,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:33:59,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092270423] [2021-07-13 19:33:59,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:33:59,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:59,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:33:59,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:59,792 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) [2021-07-13 19:33:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:59,975 INFO L93 Difference]: Finished difference Result 235 states and 517 transitions. [2021-07-13 19:33:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:33:59,975 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 [2021-07-13 19:33:59,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:59,976 INFO L225 Difference]: With dead ends: 235 [2021-07-13 19:33:59,976 INFO L226 Difference]: Without dead ends: 235 [2021-07-13 19:33:59,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:33:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-13 19:33:59,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-07-13 19:33:59,978 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) [2021-07-13 19:33:59,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-07-13 19:33:59,978 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-07-13 19:33:59,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:59,978 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-07-13 19:33:59,978 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) [2021-07-13 19:33:59,978 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-07-13 19:33:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:33:59,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:59,978 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:00,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2686,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:00,179 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:00,179 INFO L82 PathProgramCache]: Analyzing trace with hash -2023401559, now seen corresponding path program 352 times [2021-07-13 19:34:00,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:00,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932243036] [2021-07-13 19:34:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:00,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:00,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932243036] [2021-07-13 19:34:00,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932243036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:00,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993462591] [2021-07-13 19:34:00,299 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 [2021-07-13 19:34:00,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:00,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:00,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:00,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:00,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993462591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:00,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:00,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:00,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271734591] [2021-07-13 19:34:00,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:00,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:00,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:00,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:00,491 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) [2021-07-13 19:34:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:00,642 INFO L93 Difference]: Finished difference Result 255 states and 554 transitions. [2021-07-13 19:34:00,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:34:00,643 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 [2021-07-13 19:34:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:00,643 INFO L225 Difference]: With dead ends: 255 [2021-07-13 19:34:00,643 INFO L226 Difference]: Without dead ends: 252 [2021-07-13 19:34:00,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-13 19:34:00,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 209. [2021-07-13 19:34:00,645 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) [2021-07-13 19:34:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-07-13 19:34:00,645 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-07-13 19:34:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:00,646 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-07-13 19:34:00,646 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) [2021-07-13 19:34:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-07-13 19:34:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:00,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:00,646 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:00,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2691,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:00,847 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:00,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:00,847 INFO L82 PathProgramCache]: Analyzing trace with hash -896005466, now seen corresponding path program 353 times [2021-07-13 19:34:00,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:00,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472203337] [2021-07-13 19:34:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:00,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:00,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472203337] [2021-07-13 19:34:00,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472203337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:00,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279505261] [2021-07-13 19:34:00,980 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 [2021-07-13 19:34:01,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:34:01,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:01,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:01,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:01,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279505261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:01,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:01,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:01,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260127497] [2021-07-13 19:34:01,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:01,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:01,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:01,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:01,210 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) [2021-07-13 19:34:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:01,361 INFO L93 Difference]: Finished difference Result 231 states and 507 transitions. [2021-07-13 19:34:01,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:34:01,361 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 [2021-07-13 19:34:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:01,362 INFO L225 Difference]: With dead ends: 231 [2021-07-13 19:34:01,362 INFO L226 Difference]: Without dead ends: 229 [2021-07-13 19:34:01,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-07-13 19:34:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 207. [2021-07-13 19:34:01,363 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) [2021-07-13 19:34:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-07-13 19:34:01,364 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-07-13 19:34:01,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:01,364 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-07-13 19:34:01,364 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) [2021-07-13 19:34:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-07-13 19:34:01,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:01,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:01,364 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:01,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2698,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:01,565 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:01,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1517055293, now seen corresponding path program 354 times [2021-07-13 19:34:01,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:01,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061953372] [2021-07-13 19:34:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:01,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:01,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061953372] [2021-07-13 19:34:01,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061953372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:01,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714515462] [2021-07-13 19:34:01,687 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 [2021-07-13 19:34:01,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:34:01,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:01,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:01,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:01,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714515462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:01,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:01,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:01,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869108024] [2021-07-13 19:34:01,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:01,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:01,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:01,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:01,944 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) [2021-07-13 19:34:02,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:02,230 INFO L93 Difference]: Finished difference Result 225 states and 497 transitions. [2021-07-13 19:34:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:34:02,230 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 [2021-07-13 19:34:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:02,231 INFO L225 Difference]: With dead ends: 225 [2021-07-13 19:34:02,231 INFO L226 Difference]: Without dead ends: 225 [2021-07-13 19:34:02,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:34:02,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-13 19:34:02,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 209. [2021-07-13 19:34:02,233 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) [2021-07-13 19:34:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-07-13 19:34:02,233 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-07-13 19:34:02,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:02,233 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-07-13 19:34:02,233 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) [2021-07-13 19:34:02,233 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-07-13 19:34:02,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:02,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:02,234 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:02,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2706,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:02,434 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:02,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:02,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1229505058, now seen corresponding path program 355 times [2021-07-13 19:34:02,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:02,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976181607] [2021-07-13 19:34:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:02,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:02,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976181607] [2021-07-13 19:34:02,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976181607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:02,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565509945] [2021-07-13 19:34:02,554 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 [2021-07-13 19:34:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:02,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:02,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:02,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565509945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:02,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:02,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:02,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344471486] [2021-07-13 19:34:02,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:02,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:02,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:02,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:02,753 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) [2021-07-13 19:34:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:03,104 INFO L93 Difference]: Finished difference Result 267 states and 577 transitions. [2021-07-13 19:34:03,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:03,104 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 [2021-07-13 19:34:03,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:03,105 INFO L225 Difference]: With dead ends: 267 [2021-07-13 19:34:03,105 INFO L226 Difference]: Without dead ends: 267 [2021-07-13 19:34:03,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 441.6ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:03,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-07-13 19:34:03,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 210. [2021-07-13 19:34:03,107 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) [2021-07-13 19:34:03,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-07-13 19:34:03,107 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-07-13 19:34:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:03,107 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-07-13 19:34:03,107 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) [2021-07-13 19:34:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-07-13 19:34:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:03,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:03,108 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:03,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:03,308 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:03,308 INFO L82 PathProgramCache]: Analyzing trace with hash -927514778, now seen corresponding path program 356 times [2021-07-13 19:34:03,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:03,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069070522] [2021-07-13 19:34:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:03,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:03,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069070522] [2021-07-13 19:34:03,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069070522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:03,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975786496] [2021-07-13 19:34:03,427 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 [2021-07-13 19:34:03,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:03,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:03,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:03,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:03,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975786496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:03,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:03,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:03,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984869898] [2021-07-13 19:34:03,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:03,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:03,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:03,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:03,628 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) [2021-07-13 19:34:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:03,844 INFO L93 Difference]: Finished difference Result 241 states and 529 transitions. [2021-07-13 19:34:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:34:03,844 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 [2021-07-13 19:34:03,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:03,845 INFO L225 Difference]: With dead ends: 241 [2021-07-13 19:34:03,845 INFO L226 Difference]: Without dead ends: 241 [2021-07-13 19:34:03,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 325.8ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-13 19:34:03,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2021-07-13 19:34:03,847 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) [2021-07-13 19:34:03,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-07-13 19:34:03,847 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-07-13 19:34:03,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:03,847 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-07-13 19:34:03,847 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) [2021-07-13 19:34:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-07-13 19:34:03,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:03,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:03,848 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:04,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2721 [2021-07-13 19:34:04,048 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:04,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:04,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1294777065, now seen corresponding path program 357 times [2021-07-13 19:34:04,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:04,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516766457] [2021-07-13 19:34:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:04,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:04,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516766457] [2021-07-13 19:34:04,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516766457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:04,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476010339] [2021-07-13 19:34:04,144 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 [2021-07-13 19:34:04,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:34:04,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:04,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:04,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:04,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476010339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:04,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:04,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:04,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253343504] [2021-07-13 19:34:04,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:04,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:04,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:04,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:04,416 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) [2021-07-13 19:34:04,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:04,735 INFO L93 Difference]: Finished difference Result 237 states and 521 transitions. [2021-07-13 19:34:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:04,735 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 [2021-07-13 19:34:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:04,736 INFO L225 Difference]: With dead ends: 237 [2021-07-13 19:34:04,736 INFO L226 Difference]: Without dead ends: 237 [2021-07-13 19:34:04,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 422.7ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:34:04,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-13 19:34:04,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 209. [2021-07-13 19:34:04,738 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) [2021-07-13 19:34:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-07-13 19:34:04,738 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-07-13 19:34:04,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:04,738 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-07-13 19:34:04,738 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) [2021-07-13 19:34:04,738 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-07-13 19:34:04,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:04,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:04,738 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:04,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2726,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:04,939 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:04,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1582327300, now seen corresponding path program 358 times [2021-07-13 19:34:04,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:04,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762750638] [2021-07-13 19:34:04,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:05,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:05,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762750638] [2021-07-13 19:34:05,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762750638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:05,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74401569] [2021-07-13 19:34:05,034 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 [2021-07-13 19:34:05,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:05,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:05,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:34:05,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:05,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74401569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:05,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:05,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:05,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063178710] [2021-07-13 19:34:05,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:05,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:05,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:05,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:05,261 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) [2021-07-13 19:34:05,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:05,723 INFO L93 Difference]: Finished difference Result 278 states and 599 transitions. [2021-07-13 19:34:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:05,723 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 [2021-07-13 19:34:05,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:05,724 INFO L225 Difference]: With dead ends: 278 [2021-07-13 19:34:05,724 INFO L226 Difference]: Without dead ends: 278 [2021-07-13 19:34:05,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 560.2ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:05,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-07-13 19:34:05,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 211. [2021-07-13 19:34:05,726 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) [2021-07-13 19:34:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-07-13 19:34:05,726 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-07-13 19:34:05,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:05,726 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-07-13 19:34:05,727 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) [2021-07-13 19:34:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-07-13 19:34:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:05,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:05,727 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:05,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2734 [2021-07-13 19:34:05,927 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:05,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1884317580, now seen corresponding path program 359 times [2021-07-13 19:34:05,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:05,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108977241] [2021-07-13 19:34:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:06,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:06,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108977241] [2021-07-13 19:34:06,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108977241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:06,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789613800] [2021-07-13 19:34:06,028 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 [2021-07-13 19:34:06,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:34:06,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:06,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:06,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:06,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789613800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:06,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:06,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:06,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166488689] [2021-07-13 19:34:06,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:06,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:06,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:06,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:06,243 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) [2021-07-13 19:34:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:06,606 INFO L93 Difference]: Finished difference Result 254 states and 557 transitions. [2021-07-13 19:34:06,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:06,606 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 [2021-07-13 19:34:06,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:06,607 INFO L225 Difference]: With dead ends: 254 [2021-07-13 19:34:06,607 INFO L226 Difference]: Without dead ends: 254 [2021-07-13 19:34:06,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 473.4ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:34:06,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-13 19:34:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 210. [2021-07-13 19:34:06,609 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) [2021-07-13 19:34:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-07-13 19:34:06,609 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-07-13 19:34:06,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:06,609 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-07-13 19:34:06,609 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) [2021-07-13 19:34:06,609 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-07-13 19:34:06,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:06,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:06,609 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:06,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2740,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:06,810 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:06,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1904303450, now seen corresponding path program 360 times [2021-07-13 19:34:06,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:06,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71629675] [2021-07-13 19:34:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:06,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:06,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71629675] [2021-07-13 19:34:06,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71629675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:06,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522390013] [2021-07-13 19:34:06,904 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 [2021-07-13 19:34:06,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:34:06,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:06,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:06,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:07,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522390013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:07,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:07,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:07,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60622358] [2021-07-13 19:34:07,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:07,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:07,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:07,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:07,104 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) [2021-07-13 19:34:07,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:07,291 INFO L93 Difference]: Finished difference Result 242 states and 531 transitions. [2021-07-13 19:34:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:34:07,291 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 [2021-07-13 19:34:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:07,291 INFO L225 Difference]: With dead ends: 242 [2021-07-13 19:34:07,292 INFO L226 Difference]: Without dead ends: 242 [2021-07-13 19:34:07,292 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 [2021-07-13 19:34:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-13 19:34:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2021-07-13 19:34:07,294 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) [2021-07-13 19:34:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-07-13 19:34:07,294 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-07-13 19:34:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:07,294 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-07-13 19:34:07,294 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) [2021-07-13 19:34:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-07-13 19:34:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:07,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:07,294 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:07,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2745 [2021-07-13 19:34:07,495 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:07,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2111296839, now seen corresponding path program 361 times [2021-07-13 19:34:07,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:07,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868511388] [2021-07-13 19:34:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:07,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:07,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868511388] [2021-07-13 19:34:07,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868511388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:07,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107147101] [2021-07-13 19:34:07,618 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 [2021-07-13 19:34:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:07,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:07,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:07,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107147101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:07,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:07,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:07,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176877636] [2021-07-13 19:34:07,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:07,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:07,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:07,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:07,813 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) [2021-07-13 19:34:07,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:07,941 INFO L93 Difference]: Finished difference Result 236 states and 519 transitions. [2021-07-13 19:34:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:34:07,941 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 [2021-07-13 19:34:07,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:07,942 INFO L225 Difference]: With dead ends: 236 [2021-07-13 19:34:07,942 INFO L226 Difference]: Without dead ends: 236 [2021-07-13 19:34:07,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-13 19:34:07,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 209. [2021-07-13 19:34:07,944 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) [2021-07-13 19:34:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-07-13 19:34:07,944 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-07-13 19:34:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:07,944 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-07-13 19:34:07,944 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) [2021-07-13 19:34:07,944 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-07-13 19:34:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:07,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:07,945 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:08,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2750 [2021-07-13 19:34:08,145 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:08,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1386934705, now seen corresponding path program 362 times [2021-07-13 19:34:08,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:08,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909202411] [2021-07-13 19:34:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:08,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:08,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909202411] [2021-07-13 19:34:08,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909202411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:08,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881053972] [2021-07-13 19:34:08,270 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 [2021-07-13 19:34:08,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:08,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:08,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:08,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:08,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881053972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:08,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:08,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:08,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224094508] [2021-07-13 19:34:08,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:08,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:08,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:08,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:08,461 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) [2021-07-13 19:34:08,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:08,620 INFO L93 Difference]: Finished difference Result 256 states and 556 transitions. [2021-07-13 19:34:08,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:08,621 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 [2021-07-13 19:34:08,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:08,621 INFO L225 Difference]: With dead ends: 256 [2021-07-13 19:34:08,621 INFO L226 Difference]: Without dead ends: 253 [2021-07-13 19:34:08,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:08,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-07-13 19:34:08,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2021-07-13 19:34:08,623 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) [2021-07-13 19:34:08,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 468 transitions. [2021-07-13 19:34:08,623 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 468 transitions. Word has length 19 [2021-07-13 19:34:08,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:08,623 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 468 transitions. [2021-07-13 19:34:08,624 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) [2021-07-13 19:34:08,624 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 468 transitions. [2021-07-13 19:34:08,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:08,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:08,624 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:08,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2755,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:08,824 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:08,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:08,825 INFO L82 PathProgramCache]: Analyzing trace with hash -259538612, now seen corresponding path program 363 times [2021-07-13 19:34:08,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:08,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935593824] [2021-07-13 19:34:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:08,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:08,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935593824] [2021-07-13 19:34:08,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935593824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:08,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993819008] [2021-07-13 19:34:08,940 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 [2021-07-13 19:34:08,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:34:08,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:08,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:08,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:09,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993819008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:09,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:09,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:09,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817701344] [2021-07-13 19:34:09,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:09,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:09,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:09,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:09,165 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) [2021-07-13 19:34:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:09,334 INFO L93 Difference]: Finished difference Result 232 states and 509 transitions. [2021-07-13 19:34:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:09,334 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 [2021-07-13 19:34:09,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:09,335 INFO L225 Difference]: With dead ends: 232 [2021-07-13 19:34:09,335 INFO L226 Difference]: Without dead ends: 230 [2021-07-13 19:34:09,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-13 19:34:09,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 208. [2021-07-13 19:34:09,336 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) [2021-07-13 19:34:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-07-13 19:34:09,337 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-07-13 19:34:09,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:09,337 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-07-13 19:34:09,337 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) [2021-07-13 19:34:09,337 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-07-13 19:34:09,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:09,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:09,337 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:09,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2762 [2021-07-13 19:34:09,538 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:09,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:09,538 INFO L82 PathProgramCache]: Analyzing trace with hash -880588439, now seen corresponding path program 364 times [2021-07-13 19:34:09,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:09,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812595617] [2021-07-13 19:34:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:09,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:09,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812595617] [2021-07-13 19:34:09,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812595617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:09,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609149909] [2021-07-13 19:34:09,656 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 [2021-07-13 19:34:09,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:09,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:09,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:09,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609149909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:09,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:09,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:09,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122748526] [2021-07-13 19:34:09,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:09,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:09,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:09,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:09,905 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) [2021-07-13 19:34:10,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:10,090 INFO L93 Difference]: Finished difference Result 227 states and 501 transitions. [2021-07-13 19:34:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:34:10,090 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 [2021-07-13 19:34:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:10,091 INFO L225 Difference]: With dead ends: 227 [2021-07-13 19:34:10,091 INFO L226 Difference]: Without dead ends: 227 [2021-07-13 19:34:10,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:10,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-13 19:34:10,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 210. [2021-07-13 19:34:10,093 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) [2021-07-13 19:34:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-07-13 19:34:10,093 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-07-13 19:34:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:10,093 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-07-13 19:34:10,093 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) [2021-07-13 19:34:10,093 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-07-13 19:34:10,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:10,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:10,094 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:10,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2770,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:10,305 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:10,305 INFO L82 PathProgramCache]: Analyzing trace with hash -593038204, now seen corresponding path program 365 times [2021-07-13 19:34:10,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:10,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448094267] [2021-07-13 19:34:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:10,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:10,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448094267] [2021-07-13 19:34:10,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448094267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:10,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746516362] [2021-07-13 19:34:10,428 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 [2021-07-13 19:34:10,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:34:10,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:10,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:10,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:10,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746516362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:10,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:10,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:10,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082797556] [2021-07-13 19:34:10,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:10,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:10,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:10,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:10,629 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) [2021-07-13 19:34:10,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:10,977 INFO L93 Difference]: Finished difference Result 261 states and 565 transitions. [2021-07-13 19:34:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:10,977 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 [2021-07-13 19:34:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:10,977 INFO L225 Difference]: With dead ends: 261 [2021-07-13 19:34:10,977 INFO L226 Difference]: Without dead ends: 261 [2021-07-13 19:34:10,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 415.0ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:34:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-13 19:34:10,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 211. [2021-07-13 19:34:10,980 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) [2021-07-13 19:34:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 472 transitions. [2021-07-13 19:34:10,980 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 472 transitions. Word has length 19 [2021-07-13 19:34:10,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:10,980 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 472 transitions. [2021-07-13 19:34:10,980 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) [2021-07-13 19:34:10,980 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 472 transitions. [2021-07-13 19:34:10,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:10,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:10,980 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:11,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2778 [2021-07-13 19:34:11,181 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:11,181 INFO L82 PathProgramCache]: Analyzing trace with hash -291047924, now seen corresponding path program 366 times [2021-07-13 19:34:11,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:11,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488289771] [2021-07-13 19:34:11,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:11,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:11,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488289771] [2021-07-13 19:34:11,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488289771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:11,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63535831] [2021-07-13 19:34:11,300 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 [2021-07-13 19:34:11,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:34:11,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:11,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:11,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:11,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63535831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:11,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:11,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:11,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713906106] [2021-07-13 19:34:11,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:11,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:11,495 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) [2021-07-13 19:34:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:11,735 INFO L93 Difference]: Finished difference Result 241 states and 529 transitions. [2021-07-13 19:34:11,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:11,736 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 [2021-07-13 19:34:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:11,736 INFO L225 Difference]: With dead ends: 241 [2021-07-13 19:34:11,736 INFO L226 Difference]: Without dead ends: 241 [2021-07-13 19:34:11,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 338.0ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:34:11,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-13 19:34:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 207. [2021-07-13 19:34:11,738 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) [2021-07-13 19:34:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-07-13 19:34:11,738 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-07-13 19:34:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:11,738 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-07-13 19:34:11,738 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) [2021-07-13 19:34:11,738 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-07-13 19:34:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:11,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:11,739 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:11,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2785,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:11,939 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:11,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:11,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1931243919, now seen corresponding path program 367 times [2021-07-13 19:34:11,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:11,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534803787] [2021-07-13 19:34:11,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:12,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:12,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534803787] [2021-07-13 19:34:12,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534803787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:12,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203721917] [2021-07-13 19:34:12,033 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 [2021-07-13 19:34:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:12,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:12,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:12,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203721917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:12,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:12,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:12,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490172146] [2021-07-13 19:34:12,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:12,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:12,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:12,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:12,299 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) [2021-07-13 19:34:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:12,526 INFO L93 Difference]: Finished difference Result 227 states and 501 transitions. [2021-07-13 19:34:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:34:12,527 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 [2021-07-13 19:34:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:12,527 INFO L225 Difference]: With dead ends: 227 [2021-07-13 19:34:12,527 INFO L226 Difference]: Without dead ends: 227 [2021-07-13 19:34:12,527 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 [2021-07-13 19:34:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-13 19:34:12,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 210. [2021-07-13 19:34:12,529 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) [2021-07-13 19:34:12,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-07-13 19:34:12,529 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-07-13 19:34:12,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:12,529 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-07-13 19:34:12,529 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) [2021-07-13 19:34:12,529 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-07-13 19:34:12,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:12,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:12,530 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:12,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2790,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:12,730 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:12,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:12,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2076173142, now seen corresponding path program 368 times [2021-07-13 19:34:12,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:12,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138963720] [2021-07-13 19:34:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:12,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:12,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138963720] [2021-07-13 19:34:12,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138963720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:12,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087915738] [2021-07-13 19:34:12,826 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 [2021-07-13 19:34:12,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:12,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:12,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:12,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:13,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087915738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:13,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:13,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:13,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050934226] [2021-07-13 19:34:13,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:13,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:13,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:13,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:13,029 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) [2021-07-13 19:34:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:13,549 INFO L93 Difference]: Finished difference Result 280 states and 603 transitions. [2021-07-13 19:34:13,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:13,549 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 [2021-07-13 19:34:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:13,550 INFO L225 Difference]: With dead ends: 280 [2021-07-13 19:34:13,550 INFO L226 Difference]: Without dead ends: 280 [2021-07-13 19:34:13,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 543.8ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-13 19:34:13,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 212. [2021-07-13 19:34:13,552 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) [2021-07-13 19:34:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 475 transitions. [2021-07-13 19:34:13,552 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 475 transitions. Word has length 19 [2021-07-13 19:34:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:13,552 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 475 transitions. [2021-07-13 19:34:13,552 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) [2021-07-13 19:34:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 475 transitions. [2021-07-13 19:34:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:13,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:13,553 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:13,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2798,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:13,781 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:13,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1774182862, now seen corresponding path program 369 times [2021-07-13 19:34:13,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:13,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033908144] [2021-07-13 19:34:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:13,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:13,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033908144] [2021-07-13 19:34:13,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033908144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:13,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508885923] [2021-07-13 19:34:13,883 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 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 [2021-07-13 19:34:13,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:34:13,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:13,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:13,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508885923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:14,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:14,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:14,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961943629] [2021-07-13 19:34:14,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:14,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:14,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:14,091 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) [2021-07-13 19:34:14,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:14,507 INFO L93 Difference]: Finished difference Result 252 states and 553 transitions. [2021-07-13 19:34:14,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:14,507 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 [2021-07-13 19:34:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:14,507 INFO L225 Difference]: With dead ends: 252 [2021-07-13 19:34:14,507 INFO L226 Difference]: Without dead ends: 252 [2021-07-13 19:34:14,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 520.3ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-13 19:34:14,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 211. [2021-07-13 19:34:14,509 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) [2021-07-13 19:34:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-07-13 19:34:14,510 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-07-13 19:34:14,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:14,510 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-07-13 19:34:14,510 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) [2021-07-13 19:34:14,510 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-07-13 19:34:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:14,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:14,510 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:14,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2805,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:14,711 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:14,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:14,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1267836596, now seen corresponding path program 370 times [2021-07-13 19:34:14,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:14,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93443938] [2021-07-13 19:34:14,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:14,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:14,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93443938] [2021-07-13 19:34:14,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93443938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:14,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042353790] [2021-07-13 19:34:14,809 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 [2021-07-13 19:34:14,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:14,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:14,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:14,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:14,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042353790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:14,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:14,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:14,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116804394] [2021-07-13 19:34:14,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:14,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:14,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:14,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:14,998 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) [2021-07-13 19:34:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:15,220 INFO L93 Difference]: Finished difference Result 243 states and 533 transitions. [2021-07-13 19:34:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:34:15,220 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 [2021-07-13 19:34:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:15,221 INFO L225 Difference]: With dead ends: 243 [2021-07-13 19:34:15,221 INFO L226 Difference]: Without dead ends: 243 [2021-07-13 19:34:15,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 260.7ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:15,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-13 19:34:15,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 206. [2021-07-13 19:34:15,223 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) [2021-07-13 19:34:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-07-13 19:34:15,223 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-07-13 19:34:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:15,223 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-07-13 19:34:15,223 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) [2021-07-13 19:34:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-07-13 19:34:15,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:15,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:15,224 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:15,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2810 [2021-07-13 19:34:15,433 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:15,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1096266199, now seen corresponding path program 371 times [2021-07-13 19:34:15,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:15,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494558595] [2021-07-13 19:34:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:15,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:15,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494558595] [2021-07-13 19:34:15,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494558595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:15,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972861392] [2021-07-13 19:34:15,521 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 [2021-07-13 19:34:15,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:34:15,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:15,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:15,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:15,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972861392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:15,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:15,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:34:15,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585589323] [2021-07-13 19:34:15,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:34:15,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:15,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:34:15,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:15,816 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) [2021-07-13 19:34:16,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:16,181 INFO L93 Difference]: Finished difference Result 228 states and 503 transitions. [2021-07-13 19:34:16,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:34:16,181 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 [2021-07-13 19:34:16,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:16,182 INFO L225 Difference]: With dead ends: 228 [2021-07-13 19:34:16,182 INFO L226 Difference]: Without dead ends: 228 [2021-07-13 19:34:16,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 484.4ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:34:16,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-13 19:34:16,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 210. [2021-07-13 19:34:16,184 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) [2021-07-13 19:34:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-07-13 19:34:16,184 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-07-13 19:34:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:16,184 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-07-13 19:34:16,184 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) [2021-07-13 19:34:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-07-13 19:34:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:16,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:16,184 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:16,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2815,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:16,385 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:16,385 INFO L82 PathProgramCache]: Analyzing trace with hash -808715964, now seen corresponding path program 372 times [2021-07-13 19:34:16,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:16,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728166426] [2021-07-13 19:34:16,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:16,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:16,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728166426] [2021-07-13 19:34:16,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728166426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:16,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138864667] [2021-07-13 19:34:16,475 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 [2021-07-13 19:34:16,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:34:16,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:16,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:16,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:16,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138864667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:16,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:16,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:34:16,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706849922] [2021-07-13 19:34:16,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:34:16,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:16,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:34:16,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:16,697 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) [2021-07-13 19:34:17,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:17,399 INFO L93 Difference]: Finished difference Result 276 states and 595 transitions. [2021-07-13 19:34:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:34:17,399 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 [2021-07-13 19:34:17,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:17,400 INFO L225 Difference]: With dead ends: 276 [2021-07-13 19:34:17,400 INFO L226 Difference]: Without dead ends: 276 [2021-07-13 19:34:17,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 736.2ms TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:34:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-07-13 19:34:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 213. [2021-07-13 19:34:17,402 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) [2021-07-13 19:34:17,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 478 transitions. [2021-07-13 19:34:17,402 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 478 transitions. Word has length 19 [2021-07-13 19:34:17,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:17,402 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 478 transitions. [2021-07-13 19:34:17,402 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) [2021-07-13 19:34:17,403 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 478 transitions. [2021-07-13 19:34:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:17,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:17,403 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:17,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2823 [2021-07-13 19:34:17,603 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:17,604 INFO L82 PathProgramCache]: Analyzing trace with hash -506725684, now seen corresponding path program 373 times [2021-07-13 19:34:17,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:17,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470124836] [2021-07-13 19:34:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:17,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:17,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470124836] [2021-07-13 19:34:17,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470124836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:17,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524391811] [2021-07-13 19:34:17,693 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 [2021-07-13 19:34:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:17,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:17,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:17,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524391811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:17,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:17,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:34:17,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402908446] [2021-07-13 19:34:17,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:34:17,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:17,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:34:17,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:17,912 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) [2021-07-13 19:34:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:18,515 INFO L93 Difference]: Finished difference Result 265 states and 579 transitions. [2021-07-13 19:34:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:34:18,516 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 [2021-07-13 19:34:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:18,516 INFO L225 Difference]: With dead ends: 265 [2021-07-13 19:34:18,516 INFO L226 Difference]: Without dead ends: 265 [2021-07-13 19:34:18,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 654.3ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:34:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-13 19:34:18,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2021-07-13 19:34:18,518 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) [2021-07-13 19:34:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 476 transitions. [2021-07-13 19:34:18,518 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 476 transitions. Word has length 19 [2021-07-13 19:34:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:18,519 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 476 transitions. [2021-07-13 19:34:18,519 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) [2021-07-13 19:34:18,519 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 476 transitions. [2021-07-13 19:34:18,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:18,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:18,519 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:18,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2830 [2021-07-13 19:34:18,735 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:18,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:18,735 INFO L82 PathProgramCache]: Analyzing trace with hash -379418, now seen corresponding path program 374 times [2021-07-13 19:34:18,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:18,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084038078] [2021-07-13 19:34:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:18,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:18,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084038078] [2021-07-13 19:34:18,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084038078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:18,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625747140] [2021-07-13 19:34:18,825 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 [2021-07-13 19:34:18,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:18,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:18,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:19,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625747140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:19,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:19,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:34:19,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747262493] [2021-07-13 19:34:19,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:34:19,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:19,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:34:19,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:19,043 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) [2021-07-13 19:34:19,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:19,582 INFO L93 Difference]: Finished difference Result 259 states and 568 transitions. [2021-07-13 19:34:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:19,582 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 [2021-07-13 19:34:19,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:19,583 INFO L225 Difference]: With dead ends: 259 [2021-07-13 19:34:19,583 INFO L226 Difference]: Without dead ends: 259 [2021-07-13 19:34:19,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 610.6ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:34:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-07-13 19:34:19,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 211. [2021-07-13 19:34:19,585 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) [2021-07-13 19:34:19,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 474 transitions. [2021-07-13 19:34:19,585 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 474 transitions. Word has length 19 [2021-07-13 19:34:19,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:19,585 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 474 transitions. [2021-07-13 19:34:19,585 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) [2021-07-13 19:34:19,585 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 474 transitions. [2021-07-13 19:34:19,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:19,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:19,586 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:19,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2835,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:19,786 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:19,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1483514356, now seen corresponding path program 375 times [2021-07-13 19:34:19,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:19,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656795279] [2021-07-13 19:34:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:19,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:19,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656795279] [2021-07-13 19:34:19,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656795279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:19,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519390298] [2021-07-13 19:34:19,872 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 [2021-07-13 19:34:19,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:34:19,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:19,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:34:19,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:20,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519390298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:20,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:20,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:34:20,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839966247] [2021-07-13 19:34:20,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:34:20,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:20,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:34:20,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:20,074 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) [2021-07-13 19:34:20,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:20,399 INFO L93 Difference]: Finished difference Result 239 states and 525 transitions. [2021-07-13 19:34:20,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:34:20,399 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 [2021-07-13 19:34:20,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:20,400 INFO L225 Difference]: With dead ends: 239 [2021-07-13 19:34:20,400 INFO L226 Difference]: Without dead ends: 239 [2021-07-13 19:34:20,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 362.8ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:34:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-07-13 19:34:20,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 208. [2021-07-13 19:34:20,402 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) [2021-07-13 19:34:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-07-13 19:34:20,402 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-07-13 19:34:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:20,402 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-07-13 19:34:20,402 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) [2021-07-13 19:34:20,402 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-07-13 19:34:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:20,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:20,403 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:20,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2840 [2021-07-13 19:34:20,619 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:20,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:20,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1717344001, now seen corresponding path program 376 times [2021-07-13 19:34:20,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:20,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704431644] [2021-07-13 19:34:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:20,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:20,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704431644] [2021-07-13 19:34:20,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704431644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:20,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666052602] [2021-07-13 19:34:20,701 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 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 [2021-07-13 19:34:20,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:20,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:20,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:20,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:20,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666052602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:20,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:20,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:34:20,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939427688] [2021-07-13 19:34:20,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:34:20,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:20,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:34:20,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:20,889 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) [2021-07-13 19:34:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:21,106 INFO L93 Difference]: Finished difference Result 220 states and 488 transitions. [2021-07-13 19:34:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:34:21,107 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 [2021-07-13 19:34:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:21,107 INFO L225 Difference]: With dead ends: 220 [2021-07-13 19:34:21,107 INFO L226 Difference]: Without dead ends: 220 [2021-07-13 19:34:21,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:34:21,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-13 19:34:21,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2021-07-13 19:34:21,109 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) [2021-07-13 19:34:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-07-13 19:34:21,109 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-07-13 19:34:21,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:21,109 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-07-13 19:34:21,109 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) [2021-07-13 19:34:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-07-13 19:34:21,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:21,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:21,110 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:21,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2845,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:21,325 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:21,325 INFO L82 PathProgramCache]: Analyzing trace with hash -558465017, now seen corresponding path program 377 times [2021-07-13 19:34:21,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:21,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097089208] [2021-07-13 19:34:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:21,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:21,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097089208] [2021-07-13 19:34:21,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097089208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:21,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570010007] [2021-07-13 19:34:21,403 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 [2021-07-13 19:34:21,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:34:21,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:21,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:21,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:21,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570010007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:21,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:21,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:34:21,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399930525] [2021-07-13 19:34:21,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:34:21,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:21,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:34:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:21,607 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) [2021-07-13 19:34:22,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:22,047 INFO L93 Difference]: Finished difference Result 236 states and 520 transitions. [2021-07-13 19:34:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:22,048 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 [2021-07-13 19:34:22,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:22,048 INFO L225 Difference]: With dead ends: 236 [2021-07-13 19:34:22,048 INFO L226 Difference]: Without dead ends: 236 [2021-07-13 19:34:22,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 471.1ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:34:22,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-13 19:34:22,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-07-13 19:34:22,050 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) [2021-07-13 19:34:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-07-13 19:34:22,051 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-07-13 19:34:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:22,051 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-07-13 19:34:22,051 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) [2021-07-13 19:34:22,051 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-07-13 19:34:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:22,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:22,051 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:22,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2850 [2021-07-13 19:34:22,253 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:22,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1629460481, now seen corresponding path program 378 times [2021-07-13 19:34:22,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:22,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276034538] [2021-07-13 19:34:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:22,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:22,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276034538] [2021-07-13 19:34:22,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276034538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:22,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124500327] [2021-07-13 19:34:22,334 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 [2021-07-13 19:34:22,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:34:22,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:22,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:22,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124500327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:22,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:22,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:34:22,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533781079] [2021-07-13 19:34:22,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:34:22,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:22,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:34:22,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:22,535 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) [2021-07-13 19:34:23,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:23,024 INFO L93 Difference]: Finished difference Result 244 states and 534 transitions. [2021-07-13 19:34:23,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:34:23,024 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 [2021-07-13 19:34:23,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:23,025 INFO L225 Difference]: With dead ends: 244 [2021-07-13 19:34:23,025 INFO L226 Difference]: Without dead ends: 244 [2021-07-13 19:34:23,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 509.3ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:34:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-13 19:34:23,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 209. [2021-07-13 19:34:23,027 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) [2021-07-13 19:34:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-07-13 19:34:23,027 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-07-13 19:34:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:23,027 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-07-13 19:34:23,027 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) [2021-07-13 19:34:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-07-13 19:34:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:23,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:23,028 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:23,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2855,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:23,228 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:23,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:23,229 INFO L82 PathProgramCache]: Analyzing trace with hash -832724729, now seen corresponding path program 379 times [2021-07-13 19:34:23,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:23,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687147627] [2021-07-13 19:34:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:23,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:23,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687147627] [2021-07-13 19:34:23,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687147627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:23,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392939855] [2021-07-13 19:34:23,307 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 [2021-07-13 19:34:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:23,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:23,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:23,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392939855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:23,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:23,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:34:23,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820790725] [2021-07-13 19:34:23,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:34:23,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:23,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:34:23,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:23,505 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) [2021-07-13 19:34:24,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:24,339 INFO L93 Difference]: Finished difference Result 277 states and 586 transitions. [2021-07-13 19:34:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:34:24,339 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 [2021-07-13 19:34:24,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:24,340 INFO L225 Difference]: With dead ends: 277 [2021-07-13 19:34:24,340 INFO L226 Difference]: Without dead ends: 277 [2021-07-13 19:34:24,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 844.3ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:34:24,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-13 19:34:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 210. [2021-07-13 19:34:24,342 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) [2021-07-13 19:34:24,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-07-13 19:34:24,342 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-07-13 19:34:24,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:24,342 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-07-13 19:34:24,342 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) [2021-07-13 19:34:24,342 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-07-13 19:34:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:24,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:24,343 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:24,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2860 [2021-07-13 19:34:24,559 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:24,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:24,559 INFO L82 PathProgramCache]: Analyzing trace with hash 294671364, now seen corresponding path program 380 times [2021-07-13 19:34:24,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:24,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472754248] [2021-07-13 19:34:24,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:24,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:24,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472754248] [2021-07-13 19:34:24,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472754248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:24,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649669143] [2021-07-13 19:34:24,641 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 [2021-07-13 19:34:24,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:24,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:24,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:24,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:24,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649669143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:24,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:24,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:34:24,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782518886] [2021-07-13 19:34:24,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:34:24,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:34:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:24,891 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) [2021-07-13 19:34:25,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:25,211 INFO L93 Difference]: Finished difference Result 227 states and 500 transitions. [2021-07-13 19:34:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:34:25,211 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 [2021-07-13 19:34:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:25,211 INFO L225 Difference]: With dead ends: 227 [2021-07-13 19:34:25,211 INFO L226 Difference]: Without dead ends: 225 [2021-07-13 19:34:25,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 416.1ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:34:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-13 19:34:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 206. [2021-07-13 19:34:25,213 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) [2021-07-13 19:34:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 460 transitions. [2021-07-13 19:34:25,214 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 460 transitions. Word has length 19 [2021-07-13 19:34:25,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:25,214 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 460 transitions. [2021-07-13 19:34:25,214 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) [2021-07-13 19:34:25,214 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 460 transitions. [2021-07-13 19:34:25,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:25,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:25,214 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:25,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2867 [2021-07-13 19:34:25,414 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:25,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:25,415 INFO L82 PathProgramCache]: Analyzing trace with hash 708992161, now seen corresponding path program 381 times [2021-07-13 19:34:25,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:25,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405011802] [2021-07-13 19:34:25,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:25,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:25,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405011802] [2021-07-13 19:34:25,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405011802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:25,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724856360] [2021-07-13 19:34:25,507 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 [2021-07-13 19:34:25,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:34:25,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:25,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:25,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:25,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724856360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:25,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:25,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:25,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302931263] [2021-07-13 19:34:25,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:25,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:25,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:25,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:25,693 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) [2021-07-13 19:34:25,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:25,869 INFO L93 Difference]: Finished difference Result 229 states and 505 transitions. [2021-07-13 19:34:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:34:25,869 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 [2021-07-13 19:34:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:25,870 INFO L225 Difference]: With dead ends: 229 [2021-07-13 19:34:25,870 INFO L226 Difference]: Without dead ends: 229 [2021-07-13 19:34:25,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:25,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-07-13 19:34:25,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 206. [2021-07-13 19:34:25,872 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) [2021-07-13 19:34:25,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 460 transitions. [2021-07-13 19:34:25,872 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 460 transitions. Word has length 19 [2021-07-13 19:34:25,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:25,872 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 460 transitions. [2021-07-13 19:34:25,872 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) [2021-07-13 19:34:25,872 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 460 transitions. [2021-07-13 19:34:25,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:25,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:25,873 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:26,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:26,073 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:26,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:26,073 INFO L82 PathProgramCache]: Analyzing trace with hash -837134980, now seen corresponding path program 382 times [2021-07-13 19:34:26,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:26,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915297196] [2021-07-13 19:34:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:26,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:26,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915297196] [2021-07-13 19:34:26,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915297196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:26,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623691144] [2021-07-13 19:34:26,163 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 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 [2021-07-13 19:34:26,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:26,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:26,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:26,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:26,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623691144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:26,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:26,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:26,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496495317] [2021-07-13 19:34:26,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:26,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:26,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:26,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:26,392 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) [2021-07-13 19:34:26,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:26,584 INFO L93 Difference]: Finished difference Result 212 states and 467 transitions. [2021-07-13 19:34:26,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:34:26,584 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 [2021-07-13 19:34:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:26,584 INFO L225 Difference]: With dead ends: 212 [2021-07-13 19:34:26,585 INFO L226 Difference]: Without dead ends: 206 [2021-07-13 19:34:26,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:34:26,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-07-13 19:34:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-07-13 19:34:26,586 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) [2021-07-13 19:34:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-07-13 19:34:26,587 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-07-13 19:34:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:26,587 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-07-13 19:34:26,587 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) [2021-07-13 19:34:26,587 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-07-13 19:34:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:26,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:26,587 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:26,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2880,383 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:26,787 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:26,788 INFO L82 PathProgramCache]: Analyzing trace with hash -362003303, now seen corresponding path program 383 times [2021-07-13 19:34:26,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:26,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796103637] [2021-07-13 19:34:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:26,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:26,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796103637] [2021-07-13 19:34:26,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796103637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:26,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586532424] [2021-07-13 19:34:26,880 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 [2021-07-13 19:34:26,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:34:26,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:26,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:26,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:27,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586532424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:27,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:27,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:27,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400727777] [2021-07-13 19:34:27,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:27,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:27,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:27,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:27,084 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) [2021-07-13 19:34:27,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:27,516 INFO L93 Difference]: Finished difference Result 239 states and 525 transitions. [2021-07-13 19:34:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:27,516 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 [2021-07-13 19:34:27,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:27,517 INFO L225 Difference]: With dead ends: 239 [2021-07-13 19:34:27,517 INFO L226 Difference]: Without dead ends: 239 [2021-07-13 19:34:27,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:27,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-07-13 19:34:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 207. [2021-07-13 19:34:27,518 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) [2021-07-13 19:34:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-07-13 19:34:27,519 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-07-13 19:34:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:27,519 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-07-13 19:34:27,519 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) [2021-07-13 19:34:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-07-13 19:34:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:27,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:27,519 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:27,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2887,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:27,720 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:27,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1562128542, now seen corresponding path program 384 times [2021-07-13 19:34:27,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:27,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692723164] [2021-07-13 19:34:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:27,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:27,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692723164] [2021-07-13 19:34:27,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692723164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:27,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927127870] [2021-07-13 19:34:27,812 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 [2021-07-13 19:34:27,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:34:27,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:27,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:28,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927127870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:28,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:28,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:28,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237538558] [2021-07-13 19:34:28,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:28,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:28,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:28,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:28,052 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) [2021-07-13 19:34:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:28,263 INFO L93 Difference]: Finished difference Result 220 states and 487 transitions. [2021-07-13 19:34:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:34:28,263 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 [2021-07-13 19:34:28,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:28,263 INFO L225 Difference]: With dead ends: 220 [2021-07-13 19:34:28,263 INFO L226 Difference]: Without dead ends: 220 [2021-07-13 19:34:28,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:28,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-13 19:34:28,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2021-07-13 19:34:28,265 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) [2021-07-13 19:34:28,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-07-13 19:34:28,265 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-07-13 19:34:28,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:28,266 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-07-13 19:34:28,266 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) [2021-07-13 19:34:28,266 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-07-13 19:34:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:28,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:28,266 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:28,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-07-13 19:34:28,466 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:28,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:28,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1845138241, now seen corresponding path program 385 times [2021-07-13 19:34:28,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:28,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181859504] [2021-07-13 19:34:28,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:28,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:28,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181859504] [2021-07-13 19:34:28,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181859504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:28,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742910749] [2021-07-13 19:34:28,587 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 [2021-07-13 19:34:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:28,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:34:28,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:28,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742910749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:28,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:28,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:28,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548231311] [2021-07-13 19:34:28,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:28,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:28,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:28,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:28,815 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) [2021-07-13 19:34:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:29,052 INFO L93 Difference]: Finished difference Result 229 states and 505 transitions. [2021-07-13 19:34:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:29,053 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 [2021-07-13 19:34:29,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:29,053 INFO L225 Difference]: With dead ends: 229 [2021-07-13 19:34:29,053 INFO L226 Difference]: Without dead ends: 229 [2021-07-13 19:34:29,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:34:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-07-13 19:34:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 208. [2021-07-13 19:34:29,055 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) [2021-07-13 19:34:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-07-13 19:34:29,055 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-07-13 19:34:29,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:29,055 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-07-13 19:34:29,055 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) [2021-07-13 19:34:29,055 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-07-13 19:34:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:29,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:29,056 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:29,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2900,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:29,256 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:29,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:29,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1048402489, now seen corresponding path program 386 times [2021-07-13 19:34:29,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:29,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986194925] [2021-07-13 19:34:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:29,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:29,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986194925] [2021-07-13 19:34:29,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986194925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:29,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000573905] [2021-07-13 19:34:29,367 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 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 [2021-07-13 19:34:29,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:29,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:29,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:29,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000573905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:29,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:29,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:29,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577810226] [2021-07-13 19:34:29,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:29,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:29,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:29,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:29,549 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) [2021-07-13 19:34:29,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:29,826 INFO L93 Difference]: Finished difference Result 236 states and 519 transitions. [2021-07-13 19:34:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:34:29,826 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 [2021-07-13 19:34:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:29,826 INFO L225 Difference]: With dead ends: 236 [2021-07-13 19:34:29,826 INFO L226 Difference]: Without dead ends: 236 [2021-07-13 19:34:29,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 374.7ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:34:29,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-13 19:34:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-07-13 19:34:29,828 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) [2021-07-13 19:34:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-07-13 19:34:29,829 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-07-13 19:34:29,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:29,829 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-07-13 19:34:29,829 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) [2021-07-13 19:34:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-07-13 19:34:29,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:29,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:29,829 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:30,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2908 [2021-07-13 19:34:30,029 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:30,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:30,030 INFO L82 PathProgramCache]: Analyzing trace with hash -760852254, now seen corresponding path program 387 times [2021-07-13 19:34:30,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:30,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267990009] [2021-07-13 19:34:30,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:30,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:30,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267990009] [2021-07-13 19:34:30,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267990009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:30,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330386742] [2021-07-13 19:34:30,140 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 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 [2021-07-13 19:34:30,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:34:30,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:30,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:30,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:30,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330386742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:30,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:30,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:30,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970983535] [2021-07-13 19:34:30,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:30,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:30,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:30,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:30,359 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) [2021-07-13 19:34:30,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:30,492 INFO L93 Difference]: Finished difference Result 219 states and 483 transitions. [2021-07-13 19:34:30,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:34:30,493 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 [2021-07-13 19:34:30,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:30,493 INFO L225 Difference]: With dead ends: 219 [2021-07-13 19:34:30,493 INFO L226 Difference]: Without dead ends: 219 [2021-07-13 19:34:30,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-13 19:34:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 205. [2021-07-13 19:34:30,495 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) [2021-07-13 19:34:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 455 transitions. [2021-07-13 19:34:30,495 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 455 transitions. Word has length 19 [2021-07-13 19:34:30,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:30,495 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 455 transitions. [2021-07-13 19:34:30,495 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) [2021-07-13 19:34:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 455 transitions. [2021-07-13 19:34:30,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:30,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:30,496 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:30,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2915,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:30,696 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:30,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:30,696 INFO L82 PathProgramCache]: Analyzing trace with hash 585339870, now seen corresponding path program 388 times [2021-07-13 19:34:30,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:30,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702844127] [2021-07-13 19:34:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:30,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:30,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702844127] [2021-07-13 19:34:30,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702844127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:30,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595597811] [2021-07-13 19:34:30,808 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 [2021-07-13 19:34:30,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:30,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:30,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:30,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:30,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595597811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:30,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:30,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:30,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560751155] [2021-07-13 19:34:30,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:30,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:30,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:30,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:30,996 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) [2021-07-13 19:34:31,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:31,311 INFO L93 Difference]: Finished difference Result 297 states and 613 transitions. [2021-07-13 19:34:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:34:31,311 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 [2021-07-13 19:34:31,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:31,312 INFO L225 Difference]: With dead ends: 297 [2021-07-13 19:34:31,312 INFO L226 Difference]: Without dead ends: 297 [2021-07-13 19:34:31,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 333.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:34:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-07-13 19:34:31,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 207. [2021-07-13 19:34:31,314 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) [2021-07-13 19:34:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 462 transitions. [2021-07-13 19:34:31,314 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 462 transitions. Word has length 19 [2021-07-13 19:34:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:31,314 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 462 transitions. [2021-07-13 19:34:31,314 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) [2021-07-13 19:34:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 462 transitions. [2021-07-13 19:34:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:31,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:31,315 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:31,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2923,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:31,515 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:31,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:31,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2080425983, now seen corresponding path program 389 times [2021-07-13 19:34:31,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:31,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918199851] [2021-07-13 19:34:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:31,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:31,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918199851] [2021-07-13 19:34:31,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918199851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:31,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397259058] [2021-07-13 19:34:31,631 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 [2021-07-13 19:34:31,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:34:31,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:31,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:31,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:31,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397259058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:31,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:31,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:31,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143032293] [2021-07-13 19:34:31,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:31,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:31,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:31,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:31,883 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) [2021-07-13 19:34:32,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:32,096 INFO L93 Difference]: Finished difference Result 237 states and 509 transitions. [2021-07-13 19:34:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:32,096 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 [2021-07-13 19:34:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:32,097 INFO L225 Difference]: With dead ends: 237 [2021-07-13 19:34:32,097 INFO L226 Difference]: Without dead ends: 231 [2021-07-13 19:34:32,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 346.6ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:32,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-13 19:34:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 215. [2021-07-13 19:34:32,099 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) [2021-07-13 19:34:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 477 transitions. [2021-07-13 19:34:32,099 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 477 transitions. Word has length 19 [2021-07-13 19:34:32,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:32,099 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 477 transitions. [2021-07-13 19:34:32,099 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) [2021-07-13 19:34:32,099 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 477 transitions. [2021-07-13 19:34:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:32,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:32,099 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:32,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2930 [2021-07-13 19:34:32,300 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:32,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:32,300 INFO L82 PathProgramCache]: Analyzing trace with hash 47484292, now seen corresponding path program 390 times [2021-07-13 19:34:32,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:32,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988674724] [2021-07-13 19:34:32,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:32,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:32,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988674724] [2021-07-13 19:34:32,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988674724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:32,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370891831] [2021-07-13 19:34:32,415 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 [2021-07-13 19:34:32,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:34:32,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:32,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:32,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:32,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370891831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:32,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:32,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:32,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57836426] [2021-07-13 19:34:32,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:32,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:32,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:32,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:32,603 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) [2021-07-13 19:34:32,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:32,744 INFO L93 Difference]: Finished difference Result 241 states and 526 transitions. [2021-07-13 19:34:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:34:32,745 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 [2021-07-13 19:34:32,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:32,745 INFO L225 Difference]: With dead ends: 241 [2021-07-13 19:34:32,745 INFO L226 Difference]: Without dead ends: 241 [2021-07-13 19:34:32,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:32,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-13 19:34:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 213. [2021-07-13 19:34:32,747 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) [2021-07-13 19:34:32,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-07-13 19:34:32,747 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-07-13 19:34:32,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:32,747 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-07-13 19:34:32,747 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) [2021-07-13 19:34:32,748 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-07-13 19:34:32,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:32,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:32,748 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:32,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2938,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:32,948 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:32,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:32,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1345459015, now seen corresponding path program 391 times [2021-07-13 19:34:32,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:32,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866481471] [2021-07-13 19:34:32,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:33,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:33,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866481471] [2021-07-13 19:34:33,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866481471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:33,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867877879] [2021-07-13 19:34:33,040 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 [2021-07-13 19:34:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:33,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:33,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:33,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867877879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:33,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:33,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:33,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562343619] [2021-07-13 19:34:33,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:33,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:33,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:33,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:33,244 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) [2021-07-13 19:34:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:33,448 INFO L93 Difference]: Finished difference Result 234 states and 512 transitions. [2021-07-13 19:34:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:34:33,448 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 [2021-07-13 19:34:33,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:33,448 INFO L225 Difference]: With dead ends: 234 [2021-07-13 19:34:33,448 INFO L226 Difference]: Without dead ends: 234 [2021-07-13 19:34:33,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-13 19:34:33,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 213. [2021-07-13 19:34:33,450 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) [2021-07-13 19:34:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-07-13 19:34:33,451 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-07-13 19:34:33,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:33,451 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-07-13 19:34:33,451 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) [2021-07-13 19:34:33,451 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-07-13 19:34:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:33,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:33,451 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:33,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2943 [2021-07-13 19:34:33,652 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:33,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:33,652 INFO L82 PathProgramCache]: Analyzing trace with hash 274463551, now seen corresponding path program 392 times [2021-07-13 19:34:33,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:33,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422846202] [2021-07-13 19:34:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:33,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:33,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422846202] [2021-07-13 19:34:33,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422846202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:33,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954158608] [2021-07-13 19:34:33,746 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 [2021-07-13 19:34:33,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:33,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:33,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:33,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:33,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954158608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:33,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:33,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:33,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778625175] [2021-07-13 19:34:33,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:33,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:33,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:33,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:33,947 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) [2021-07-13 19:34:34,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:34,330 INFO L93 Difference]: Finished difference Result 246 states and 536 transitions. [2021-07-13 19:34:34,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:34,331 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 [2021-07-13 19:34:34,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:34,331 INFO L225 Difference]: With dead ends: 246 [2021-07-13 19:34:34,331 INFO L226 Difference]: Without dead ends: 246 [2021-07-13 19:34:34,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 461.3ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:34:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-13 19:34:34,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 214. [2021-07-13 19:34:34,333 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) [2021-07-13 19:34:34,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 472 transitions. [2021-07-13 19:34:34,337 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 472 transitions. Word has length 19 [2021-07-13 19:34:34,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:34,337 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 472 transitions. [2021-07-13 19:34:34,337 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) [2021-07-13 19:34:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 472 transitions. [2021-07-13 19:34:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:34,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:34,338 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:34,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2948,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:34,538 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash -2096371900, now seen corresponding path program 393 times [2021-07-13 19:34:34,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:34,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300217176] [2021-07-13 19:34:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:34,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:34,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300217176] [2021-07-13 19:34:34,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300217176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:34,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587511285] [2021-07-13 19:34:34,631 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 [2021-07-13 19:34:34,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:34:34,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:34,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:34:34,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:34,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587511285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:34,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:34,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:34,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613872456] [2021-07-13 19:34:34,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:34,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:34,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:34,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:34,880 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) [2021-07-13 19:34:35,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:35,114 INFO L93 Difference]: Finished difference Result 227 states and 498 transitions. [2021-07-13 19:34:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:34:35,115 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 [2021-07-13 19:34:35,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:35,115 INFO L225 Difference]: With dead ends: 227 [2021-07-13 19:34:35,115 INFO L226 Difference]: Without dead ends: 227 [2021-07-13 19:34:35,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:34:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-13 19:34:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2021-07-13 19:34:35,117 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) [2021-07-13 19:34:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-07-13 19:34:35,117 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-07-13 19:34:35,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:35,117 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-07-13 19:34:35,117 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) [2021-07-13 19:34:35,117 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-07-13 19:34:35,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:35,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:35,118 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:35,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2953 [2021-07-13 19:34:35,318 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:35,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:35,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1208671387, now seen corresponding path program 394 times [2021-07-13 19:34:35,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:35,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606396624] [2021-07-13 19:34:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:35,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:35,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606396624] [2021-07-13 19:34:35,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606396624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:35,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378122990] [2021-07-13 19:34:35,437 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 [2021-07-13 19:34:35,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:35,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:35,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:35,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:35,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378122990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:35,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:35,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:35,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556365272] [2021-07-13 19:34:35,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:35,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:35,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:35,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:35,636 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) [2021-07-13 19:34:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:35,828 INFO L93 Difference]: Finished difference Result 235 states and 514 transitions. [2021-07-13 19:34:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:34:35,828 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 [2021-07-13 19:34:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:35,828 INFO L225 Difference]: With dead ends: 235 [2021-07-13 19:34:35,829 INFO L226 Difference]: Without dead ends: 235 [2021-07-13 19:34:35,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-13 19:34:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 213. [2021-07-13 19:34:35,830 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) [2021-07-13 19:34:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-07-13 19:34:35,831 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-07-13 19:34:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:35,831 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-07-13 19:34:35,831 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) [2021-07-13 19:34:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-07-13 19:34:35,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:35,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:35,831 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:36,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2962,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:36,032 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:36,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:36,032 INFO L82 PathProgramCache]: Analyzing trace with hash -411935635, now seen corresponding path program 395 times [2021-07-13 19:34:36,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:36,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106854667] [2021-07-13 19:34:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:36,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:36,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106854667] [2021-07-13 19:34:36,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106854667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:36,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236988149] [2021-07-13 19:34:36,145 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 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 [2021-07-13 19:34:36,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:34:36,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:36,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:36,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:36,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236988149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:36,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:36,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:36,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428348323] [2021-07-13 19:34:36,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:36,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:36,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:36,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:36,338 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) [2021-07-13 19:34:36,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:36,663 INFO L93 Difference]: Finished difference Result 248 states and 540 transitions. [2021-07-13 19:34:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:34:36,664 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 [2021-07-13 19:34:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:36,664 INFO L225 Difference]: With dead ends: 248 [2021-07-13 19:34:36,664 INFO L226 Difference]: Without dead ends: 248 [2021-07-13 19:34:36,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 423.3ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:34:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-13 19:34:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 214. [2021-07-13 19:34:36,666 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) [2021-07-13 19:34:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 472 transitions. [2021-07-13 19:34:36,666 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 472 transitions. Word has length 19 [2021-07-13 19:34:36,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:36,666 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 472 transitions. [2021-07-13 19:34:36,666 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) [2021-07-13 19:34:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 472 transitions. [2021-07-13 19:34:36,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:36,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:36,667 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:36,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2967,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:36,867 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:36,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:36,867 INFO L82 PathProgramCache]: Analyzing trace with hash -124385400, now seen corresponding path program 396 times [2021-07-13 19:34:36,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:36,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967077525] [2021-07-13 19:34:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:36,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:36,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967077525] [2021-07-13 19:34:36,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967077525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:36,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414752845] [2021-07-13 19:34:36,981 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 [2021-07-13 19:34:37,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:34:37,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:37,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:37,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414752845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:37,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:37,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:37,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908165602] [2021-07-13 19:34:37,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:37,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:37,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:37,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:37,207 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) [2021-07-13 19:34:37,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:37,450 INFO L93 Difference]: Finished difference Result 228 states and 502 transitions. [2021-07-13 19:34:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:34:37,450 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 [2021-07-13 19:34:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:37,450 INFO L225 Difference]: With dead ends: 228 [2021-07-13 19:34:37,450 INFO L226 Difference]: Without dead ends: 228 [2021-07-13 19:34:37,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:34:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-13 19:34:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 212. [2021-07-13 19:34:37,452 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) [2021-07-13 19:34:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-07-13 19:34:37,452 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-07-13 19:34:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:37,453 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-07-13 19:34:37,453 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) [2021-07-13 19:34:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-07-13 19:34:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:37,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:37,453 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:37,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-07-13 19:34:37,653 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:37,654 INFO L82 PathProgramCache]: Analyzing trace with hash -745435227, now seen corresponding path program 397 times [2021-07-13 19:34:37,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:37,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722254798] [2021-07-13 19:34:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:37,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:37,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722254798] [2021-07-13 19:34:37,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722254798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:37,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001049237] [2021-07-13 19:34:37,766 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 [2021-07-13 19:34:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:37,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:37,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:38,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001049237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:38,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:38,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:38,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221614576] [2021-07-13 19:34:38,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:38,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:38,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:38,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:38,021 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) [2021-07-13 19:34:38,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:38,251 INFO L93 Difference]: Finished difference Result 240 states and 513 transitions. [2021-07-13 19:34:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:34:38,252 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 [2021-07-13 19:34:38,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:38,252 INFO L225 Difference]: With dead ends: 240 [2021-07-13 19:34:38,252 INFO L226 Difference]: Without dead ends: 240 [2021-07-13 19:34:38,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 396.4ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-13 19:34:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 213. [2021-07-13 19:34:38,254 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) [2021-07-13 19:34:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 467 transitions. [2021-07-13 19:34:38,254 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 467 transitions. Word has length 19 [2021-07-13 19:34:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:38,254 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 467 transitions. [2021-07-13 19:34:38,254 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) [2021-07-13 19:34:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 467 transitions. [2021-07-13 19:34:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:38,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:38,255 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:38,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-07-13 19:34:38,455 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:38,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1221806724, now seen corresponding path program 398 times [2021-07-13 19:34:38,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:38,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824935810] [2021-07-13 19:34:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:38,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:38,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824935810] [2021-07-13 19:34:38,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824935810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:38,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528165877] [2021-07-13 19:34:38,584 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 [2021-07-13 19:34:38,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:38,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:38,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:38,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:38,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528165877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:38,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:38,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:38,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499660706] [2021-07-13 19:34:38,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:38,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:38,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:38,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:38,772 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) [2021-07-13 19:34:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:38,961 INFO L93 Difference]: Finished difference Result 280 states and 590 transitions. [2021-07-13 19:34:38,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:38,961 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 [2021-07-13 19:34:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:38,962 INFO L225 Difference]: With dead ends: 280 [2021-07-13 19:34:38,962 INFO L226 Difference]: Without dead ends: 280 [2021-07-13 19:34:38,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:38,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-13 19:34:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 215. [2021-07-13 19:34:38,964 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) [2021-07-13 19:34:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 474 transitions. [2021-07-13 19:34:38,964 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 474 transitions. Word has length 19 [2021-07-13 19:34:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:38,964 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 474 transitions. [2021-07-13 19:34:38,964 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) [2021-07-13 19:34:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 474 transitions. [2021-07-13 19:34:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:38,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:38,964 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:39,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2990,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:39,165 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:39,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:39,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1578074459, now seen corresponding path program 399 times [2021-07-13 19:34:39,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:39,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135642918] [2021-07-13 19:34:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:39,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:39,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135642918] [2021-07-13 19:34:39,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135642918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:39,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243792474] [2021-07-13 19:34:39,276 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 [2021-07-13 19:34:39,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:34:39,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:39,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:39,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:39,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243792474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:39,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:39,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:39,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770852098] [2021-07-13 19:34:39,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:39,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:39,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:39,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:39,533 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) [2021-07-13 19:34:39,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:39,680 INFO L93 Difference]: Finished difference Result 225 states and 490 transitions. [2021-07-13 19:34:39,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:34:39,681 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 [2021-07-13 19:34:39,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:39,681 INFO L225 Difference]: With dead ends: 225 [2021-07-13 19:34:39,681 INFO L226 Difference]: Without dead ends: 219 [2021-07-13 19:34:39,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 323.6ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:39,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-13 19:34:39,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 212. [2021-07-13 19:34:39,683 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) [2021-07-13 19:34:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-07-13 19:34:39,683 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-07-13 19:34:39,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:39,683 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-07-13 19:34:39,683 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) [2021-07-13 19:34:39,683 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-07-13 19:34:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:39,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:39,684 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:39,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2997 [2021-07-13 19:34:39,884 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:39,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:39,884 INFO L82 PathProgramCache]: Analyzing trace with hash 683951146, now seen corresponding path program 400 times [2021-07-13 19:34:39,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:39,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818174611] [2021-07-13 19:34:39,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:39,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:39,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818174611] [2021-07-13 19:34:39,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818174611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:39,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496852539] [2021-07-13 19:34:39,999 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 [2021-07-13 19:34:40,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:40,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:40,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:40,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:40,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496852539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:40,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:40,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:40,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803913359] [2021-07-13 19:34:40,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:40,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:40,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:40,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:40,201 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) [2021-07-13 19:34:40,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:40,365 INFO L93 Difference]: Finished difference Result 238 states and 517 transitions. [2021-07-13 19:34:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:34:40,366 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 [2021-07-13 19:34:40,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:40,366 INFO L225 Difference]: With dead ends: 238 [2021-07-13 19:34:40,366 INFO L226 Difference]: Without dead ends: 238 [2021-07-13 19:34:40,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:40,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-13 19:34:40,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 208. [2021-07-13 19:34:40,368 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) [2021-07-13 19:34:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 457 transitions. [2021-07-13 19:34:40,369 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 457 transitions. Word has length 19 [2021-07-13 19:34:40,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:40,369 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 457 transitions. [2021-07-13 19:34:40,369 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) [2021-07-13 19:34:40,369 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 457 transitions. [2021-07-13 19:34:40,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:40,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:40,369 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:40,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3005,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:40,570 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:40,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:40,570 INFO L82 PathProgramCache]: Analyzing trace with hash 58785791, now seen corresponding path program 401 times [2021-07-13 19:34:40,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:40,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602852745] [2021-07-13 19:34:40,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:40,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:40,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602852745] [2021-07-13 19:34:40,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602852745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:40,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525710672] [2021-07-13 19:34:40,689 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 [2021-07-13 19:34:40,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:34:40,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:40,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:34:40,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:40,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525710672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:40,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:40,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:40,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297536596] [2021-07-13 19:34:40,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:40,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:40,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:40,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:40,928 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) [2021-07-13 19:34:41,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:41,145 INFO L93 Difference]: Finished difference Result 236 states and 513 transitions. [2021-07-13 19:34:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:34:41,145 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 [2021-07-13 19:34:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:41,146 INFO L225 Difference]: With dead ends: 236 [2021-07-13 19:34:41,146 INFO L226 Difference]: Without dead ends: 236 [2021-07-13 19:34:41,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-13 19:34:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-07-13 19:34:41,148 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) [2021-07-13 19:34:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 457 transitions. [2021-07-13 19:34:41,148 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 457 transitions. Word has length 19 [2021-07-13 19:34:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:41,148 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 457 transitions. [2021-07-13 19:34:41,148 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) [2021-07-13 19:34:41,148 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 457 transitions. [2021-07-13 19:34:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:41,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:41,148 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:41,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3010 [2021-07-13 19:34:41,349 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:41,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1982917636, now seen corresponding path program 402 times [2021-07-13 19:34:41,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:41,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852851568] [2021-07-13 19:34:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:41,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:41,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852851568] [2021-07-13 19:34:41,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852851568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:41,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328717789] [2021-07-13 19:34:41,468 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 [2021-07-13 19:34:41,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:34:41,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:41,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:34:41,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:41,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328717789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:41,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:41,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:34:41,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113415297] [2021-07-13 19:34:41,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:34:41,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:41,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:34:41,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:41,696 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) [2021-07-13 19:34:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:42,221 INFO L93 Difference]: Finished difference Result 317 states and 654 transitions. [2021-07-13 19:34:42,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:34:42,222 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 [2021-07-13 19:34:42,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:42,222 INFO L225 Difference]: With dead ends: 317 [2021-07-13 19:34:42,222 INFO L226 Difference]: Without dead ends: 317 [2021-07-13 19:34:42,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 626.3ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:34:42,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-13 19:34:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 210. [2021-07-13 19:34:42,224 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) [2021-07-13 19:34:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 466 transitions. [2021-07-13 19:34:42,225 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 466 transitions. Word has length 19 [2021-07-13 19:34:42,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:42,225 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 466 transitions. [2021-07-13 19:34:42,225 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) [2021-07-13 19:34:42,225 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 466 transitions. [2021-07-13 19:34:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:42,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:42,225 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:42,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:42,426 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:42,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:42,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1154672572, now seen corresponding path program 403 times [2021-07-13 19:34:42,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:42,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597249701] [2021-07-13 19:34:42,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:42,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:42,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597249701] [2021-07-13 19:34:42,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597249701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:42,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838651926] [2021-07-13 19:34:42,543 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 [2021-07-13 19:34:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:42,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:34:42,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:42,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838651926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:42,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:42,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:42,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464080092] [2021-07-13 19:34:42,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:42,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:42,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:42,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:42,783 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) [2021-07-13 19:34:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:43,118 INFO L93 Difference]: Finished difference Result 255 states and 545 transitions. [2021-07-13 19:34:43,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:43,118 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 [2021-07-13 19:34:43,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:43,119 INFO L225 Difference]: With dead ends: 255 [2021-07-13 19:34:43,119 INFO L226 Difference]: Without dead ends: 253 [2021-07-13 19:34:43,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 474.0ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:34:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-07-13 19:34:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2021-07-13 19:34:43,121 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) [2021-07-13 19:34:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 465 transitions. [2021-07-13 19:34:43,121 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 465 transitions. Word has length 19 [2021-07-13 19:34:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:43,121 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 465 transitions. [2021-07-13 19:34:43,121 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) [2021-07-13 19:34:43,121 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 465 transitions. [2021-07-13 19:34:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:43,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:43,122 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:43,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3021 [2021-07-13 19:34:43,322 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:43,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1805703394, now seen corresponding path program 404 times [2021-07-13 19:34:43,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:43,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354741477] [2021-07-13 19:34:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:43,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:43,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354741477] [2021-07-13 19:34:43,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354741477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:43,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278653335] [2021-07-13 19:34:43,438 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 [2021-07-13 19:34:43,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:43,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:43,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:43,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:43,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278653335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:43,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:43,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:43,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651250881] [2021-07-13 19:34:43,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:43,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:43,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:43,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:43,637 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) [2021-07-13 19:34:44,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:44,035 INFO L93 Difference]: Finished difference Result 265 states and 565 transitions. [2021-07-13 19:34:44,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:44,035 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 [2021-07-13 19:34:44,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:44,036 INFO L225 Difference]: With dead ends: 265 [2021-07-13 19:34:44,036 INFO L226 Difference]: Without dead ends: 265 [2021-07-13 19:34:44,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:34:44,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-13 19:34:44,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 209. [2021-07-13 19:34:44,038 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) [2021-07-13 19:34:44,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 461 transitions. [2021-07-13 19:34:44,038 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 461 transitions. Word has length 19 [2021-07-13 19:34:44,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:44,038 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 461 transitions. [2021-07-13 19:34:44,038 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) [2021-07-13 19:34:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 461 transitions. [2021-07-13 19:34:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:44,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:44,039 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:44,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3028 [2021-07-13 19:34:44,239 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:44,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:44,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1951408324, now seen corresponding path program 405 times [2021-07-13 19:34:44,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:44,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188860103] [2021-07-13 19:34:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:44,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:44,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188860103] [2021-07-13 19:34:44,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188860103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:44,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101464736] [2021-07-13 19:34:44,353 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 [2021-07-13 19:34:44,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:34:44,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:44,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:44,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:44,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101464736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:44,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:44,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:44,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531791323] [2021-07-13 19:34:44,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:44,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:44,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:44,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:44,549 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) [2021-07-13 19:34:44,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:44,705 INFO L93 Difference]: Finished difference Result 237 states and 514 transitions. [2021-07-13 19:34:44,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:44,706 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 [2021-07-13 19:34:44,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:44,706 INFO L225 Difference]: With dead ends: 237 [2021-07-13 19:34:44,706 INFO L226 Difference]: Without dead ends: 237 [2021-07-13 19:34:44,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-13 19:34:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 207. [2021-07-13 19:34:44,708 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) [2021-07-13 19:34:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 454 transitions. [2021-07-13 19:34:44,708 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 454 transitions. Word has length 19 [2021-07-13 19:34:44,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:44,708 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 454 transitions. [2021-07-13 19:34:44,708 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) [2021-07-13 19:34:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 454 transitions. [2021-07-13 19:34:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:44,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:44,709 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:44,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:44,909 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:44,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1006128964, now seen corresponding path program 406 times [2021-07-13 19:34:44,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:44,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375470555] [2021-07-13 19:34:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:45,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:45,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375470555] [2021-07-13 19:34:45,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375470555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:45,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89788175] [2021-07-13 19:34:45,003 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 [2021-07-13 19:34:45,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:45,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:45,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:45,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:45,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89788175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:45,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:45,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:45,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606198464] [2021-07-13 19:34:45,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:45,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:45,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:45,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:45,207 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) [2021-07-13 19:34:45,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:45,794 INFO L93 Difference]: Finished difference Result 294 states and 611 transitions. [2021-07-13 19:34:45,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:34:45,794 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 [2021-07-13 19:34:45,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:45,795 INFO L225 Difference]: With dead ends: 294 [2021-07-13 19:34:45,795 INFO L226 Difference]: Without dead ends: 294 [2021-07-13 19:34:45,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 554.2ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:34:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-13 19:34:45,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 209. [2021-07-13 19:34:45,797 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) [2021-07-13 19:34:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 462 transitions. [2021-07-13 19:34:45,797 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 462 transitions. Word has length 19 [2021-07-13 19:34:45,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:45,797 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 462 transitions. [2021-07-13 19:34:45,797 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) [2021-07-13 19:34:45,797 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 462 transitions. [2021-07-13 19:34:45,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:45,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:45,798 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:45,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-07-13 19:34:45,998 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:45,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:45,998 INFO L82 PathProgramCache]: Analyzing trace with hash 468273386, now seen corresponding path program 407 times [2021-07-13 19:34:45,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:45,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126012625] [2021-07-13 19:34:45,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:46,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:46,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126012625] [2021-07-13 19:34:46,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126012625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:46,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208107687] [2021-07-13 19:34:46,093 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 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 [2021-07-13 19:34:46,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:34:46,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:46,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:34:46,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:46,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208107687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:46,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:46,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:46,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152625376] [2021-07-13 19:34:46,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:46,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:46,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:46,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:46,301 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) [2021-07-13 19:34:46,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:46,684 INFO L93 Difference]: Finished difference Result 247 states and 536 transitions. [2021-07-13 19:34:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:46,685 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 [2021-07-13 19:34:46,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:46,685 INFO L225 Difference]: With dead ends: 247 [2021-07-13 19:34:46,685 INFO L226 Difference]: Without dead ends: 247 [2021-07-13 19:34:46,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 419.9ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:46,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-13 19:34:46,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 208. [2021-07-13 19:34:46,687 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) [2021-07-13 19:34:46,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 460 transitions. [2021-07-13 19:34:46,687 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 460 transitions. Word has length 19 [2021-07-13 19:34:46,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:46,688 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 460 transitions. [2021-07-13 19:34:46,688 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) [2021-07-13 19:34:46,688 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 460 transitions. [2021-07-13 19:34:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:46,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:46,688 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:46,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3047,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:46,888 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:46,889 INFO L82 PathProgramCache]: Analyzing trace with hash 974619652, now seen corresponding path program 408 times [2021-07-13 19:34:46,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:46,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404122569] [2021-07-13 19:34:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:46,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:46,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404122569] [2021-07-13 19:34:46,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404122569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:46,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092093825] [2021-07-13 19:34:46,988 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 [2021-07-13 19:34:47,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:34:47,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:47,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:34:47,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:47,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092093825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:47,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:47,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:47,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111333149] [2021-07-13 19:34:47,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:47,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:47,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:47,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:47,225 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) [2021-07-13 19:34:47,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:47,401 INFO L93 Difference]: Finished difference Result 241 states and 522 transitions. [2021-07-13 19:34:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:47,401 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 [2021-07-13 19:34:47,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:47,402 INFO L225 Difference]: With dead ends: 241 [2021-07-13 19:34:47,402 INFO L226 Difference]: Without dead ends: 241 [2021-07-13 19:34:47,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:47,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-13 19:34:47,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 205. [2021-07-13 19:34:47,404 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) [2021-07-13 19:34:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-07-13 19:34:47,404 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-07-13 19:34:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:47,404 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-07-13 19:34:47,404 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) [2021-07-13 19:34:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-07-13 19:34:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:47,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:47,404 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:47,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3052 [2021-07-13 19:34:47,605 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:47,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:47,605 INFO L82 PathProgramCache]: Analyzing trace with hash -398904991, now seen corresponding path program 409 times [2021-07-13 19:34:47,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:47,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157492089] [2021-07-13 19:34:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:47,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:47,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157492089] [2021-07-13 19:34:47,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157492089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:47,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312520014] [2021-07-13 19:34:47,702 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 [2021-07-13 19:34:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:47,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:47,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:47,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312520014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:47,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:47,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:47,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089689590] [2021-07-13 19:34:47,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:47,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:47,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:47,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:47,902 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) [2021-07-13 19:34:48,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:48,162 INFO L93 Difference]: Finished difference Result 226 states and 492 transitions. [2021-07-13 19:34:48,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:48,163 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 [2021-07-13 19:34:48,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:48,163 INFO L225 Difference]: With dead ends: 226 [2021-07-13 19:34:48,163 INFO L226 Difference]: Without dead ends: 226 [2021-07-13 19:34:48,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-13 19:34:48,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 205. [2021-07-13 19:34:48,165 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) [2021-07-13 19:34:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-07-13 19:34:48,165 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-07-13 19:34:48,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:48,165 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-07-13 19:34:48,165 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) [2021-07-13 19:34:48,165 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-07-13 19:34:48,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:48,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:48,166 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:48,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3057,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:48,366 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:48,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:48,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1469900455, now seen corresponding path program 410 times [2021-07-13 19:34:48,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:48,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612863426] [2021-07-13 19:34:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:48,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:48,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612863426] [2021-07-13 19:34:48,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612863426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:48,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216942199] [2021-07-13 19:34:48,465 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 [2021-07-13 19:34:48,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:48,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:48,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:34:48,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:48,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216942199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:48,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:48,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:48,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896156139] [2021-07-13 19:34:48,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:48,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:48,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:48,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:48,671 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) [2021-07-13 19:34:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:49,106 INFO L93 Difference]: Finished difference Result 239 states and 518 transitions. [2021-07-13 19:34:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:34:49,106 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 [2021-07-13 19:34:49,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:49,107 INFO L225 Difference]: With dead ends: 239 [2021-07-13 19:34:49,107 INFO L226 Difference]: Without dead ends: 239 [2021-07-13 19:34:49,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 471.1ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:34:49,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-07-13 19:34:49,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 205. [2021-07-13 19:34:49,109 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) [2021-07-13 19:34:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-07-13 19:34:49,109 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-07-13 19:34:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:49,109 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-07-13 19:34:49,109 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) [2021-07-13 19:34:49,109 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-07-13 19:34:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:49,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:49,110 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:49,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3062,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:49,310 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:49,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:49,310 INFO L82 PathProgramCache]: Analyzing trace with hash -673164703, now seen corresponding path program 411 times [2021-07-13 19:34:49,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:49,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368992897] [2021-07-13 19:34:49,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:49,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:49,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368992897] [2021-07-13 19:34:49,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368992897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:49,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748142270] [2021-07-13 19:34:49,410 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 [2021-07-13 19:34:49,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:34:49,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:49,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:49,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:49,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748142270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:49,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:49,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:49,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515821152] [2021-07-13 19:34:49,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:49,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:49,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:49,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:49,622 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) [2021-07-13 19:34:50,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:50,114 INFO L93 Difference]: Finished difference Result 247 states and 534 transitions. [2021-07-13 19:34:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:50,115 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 [2021-07-13 19:34:50,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:50,115 INFO L225 Difference]: With dead ends: 247 [2021-07-13 19:34:50,115 INFO L226 Difference]: Without dead ends: 247 [2021-07-13 19:34:50,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-13 19:34:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 205. [2021-07-13 19:34:50,117 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) [2021-07-13 19:34:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-07-13 19:34:50,117 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-07-13 19:34:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:50,118 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-07-13 19:34:50,118 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) [2021-07-13 19:34:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-07-13 19:34:50,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:50,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:50,118 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:50,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-07-13 19:34:50,318 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:50,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:50,319 INFO L82 PathProgramCache]: Analyzing trace with hash -385614468, now seen corresponding path program 412 times [2021-07-13 19:34:50,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:50,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138668206] [2021-07-13 19:34:50,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:50,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:50,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138668206] [2021-07-13 19:34:50,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138668206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:50,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188917996] [2021-07-13 19:34:50,415 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 [2021-07-13 19:34:50,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:50,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:50,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:50,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:50,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188917996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:50,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:50,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:50,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798949594] [2021-07-13 19:34:50,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:50,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:50,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:50,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:50,659 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) [2021-07-13 19:34:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:50,864 INFO L93 Difference]: Finished difference Result 223 states and 485 transitions. [2021-07-13 19:34:50,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:50,864 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 [2021-07-13 19:34:50,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:50,864 INFO L225 Difference]: With dead ends: 223 [2021-07-13 19:34:50,864 INFO L226 Difference]: Without dead ends: 223 [2021-07-13 19:34:50,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:50,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-07-13 19:34:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 200. [2021-07-13 19:34:50,866 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) [2021-07-13 19:34:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-07-13 19:34:50,866 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-07-13 19:34:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:50,866 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-07-13 19:34:50,866 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) [2021-07-13 19:34:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-07-13 19:34:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:50,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:50,867 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:51,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3074,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:51,067 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:51,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1341931903, now seen corresponding path program 413 times [2021-07-13 19:34:51,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:51,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073957938] [2021-07-13 19:34:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:51,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:51,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073957938] [2021-07-13 19:34:51,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073957938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:51,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443398035] [2021-07-13 19:34:51,183 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 [2021-07-13 19:34:51,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:34:51,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:51,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:51,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:51,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443398035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:51,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:51,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:51,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802875279] [2021-07-13 19:34:51,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:51,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:51,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:51,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:51,386 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) [2021-07-13 19:34:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:51,672 INFO L93 Difference]: Finished difference Result 224 states and 484 transitions. [2021-07-13 19:34:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:34:51,672 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 [2021-07-13 19:34:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:51,672 INFO L225 Difference]: With dead ends: 224 [2021-07-13 19:34:51,673 INFO L226 Difference]: Without dead ends: 224 [2021-07-13 19:34:51,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 331.2ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:51,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-13 19:34:51,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 200. [2021-07-13 19:34:51,674 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) [2021-07-13 19:34:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-07-13 19:34:51,675 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-07-13 19:34:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:51,675 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-07-13 19:34:51,675 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) [2021-07-13 19:34:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-07-13 19:34:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:51,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:51,675 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:51,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3082 [2021-07-13 19:34:51,876 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:51,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:51,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2138667655, now seen corresponding path program 414 times [2021-07-13 19:34:51,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:51,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068893910] [2021-07-13 19:34:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:51,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:51,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068893910] [2021-07-13 19:34:51,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068893910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:51,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061187248] [2021-07-13 19:34:51,993 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 [2021-07-13 19:34:52,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:34:52,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:52,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:34:52,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:52,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061187248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:52,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:52,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:52,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575049793] [2021-07-13 19:34:52,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:52,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:52,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:52,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:52,198 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) [2021-07-13 19:34:52,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:52,586 INFO L93 Difference]: Finished difference Result 241 states and 518 transitions. [2021-07-13 19:34:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:52,586 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 [2021-07-13 19:34:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:52,586 INFO L225 Difference]: With dead ends: 241 [2021-07-13 19:34:52,586 INFO L226 Difference]: Without dead ends: 241 [2021-07-13 19:34:52,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 434.0ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:34:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-13 19:34:52,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 200. [2021-07-13 19:34:52,588 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) [2021-07-13 19:34:52,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-07-13 19:34:52,589 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-07-13 19:34:52,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:52,589 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-07-13 19:34:52,589 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) [2021-07-13 19:34:52,589 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-07-13 19:34:52,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:52,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:52,589 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:52,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-07-13 19:34:52,789 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:52,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:52,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1868749406, now seen corresponding path program 415 times [2021-07-13 19:34:52,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:52,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485723725] [2021-07-13 19:34:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:52,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:52,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485723725] [2021-07-13 19:34:52,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485723725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:52,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11021202] [2021-07-13 19:34:52,903 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 [2021-07-13 19:34:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:52,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:52,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:53,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11021202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:53,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:53,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:53,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297096948] [2021-07-13 19:34:53,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:53,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:53,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:53,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:53,132 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) [2021-07-13 19:34:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:53,377 INFO L93 Difference]: Finished difference Result 221 states and 480 transitions. [2021-07-13 19:34:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:53,377 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 [2021-07-13 19:34:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:53,377 INFO L225 Difference]: With dead ends: 221 [2021-07-13 19:34:53,377 INFO L226 Difference]: Without dead ends: 221 [2021-07-13 19:34:53,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 383.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:34:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-07-13 19:34:53,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 198. [2021-07-13 19:34:53,379 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) [2021-07-13 19:34:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 432 transitions. [2021-07-13 19:34:53,380 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 432 transitions. Word has length 19 [2021-07-13 19:34:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:53,380 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 432 transitions. [2021-07-13 19:34:53,380 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) [2021-07-13 19:34:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 432 transitions. [2021-07-13 19:34:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:53,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:53,380 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:53,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3094,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:53,580 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:53,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:53,581 INFO L82 PathProgramCache]: Analyzing trace with hash -522557282, now seen corresponding path program 416 times [2021-07-13 19:34:53,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:53,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913379838] [2021-07-13 19:34:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:53,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:53,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913379838] [2021-07-13 19:34:53,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913379838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:53,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780941307] [2021-07-13 19:34:53,697 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 [2021-07-13 19:34:53,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:53,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:53,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:53,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:53,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780941307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:53,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:53,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:53,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951682231] [2021-07-13 19:34:53,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:53,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:53,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:53,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:53,903 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) [2021-07-13 19:34:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:54,182 INFO L93 Difference]: Finished difference Result 255 states and 541 transitions. [2021-07-13 19:34:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:34:54,182 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 [2021-07-13 19:34:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:54,182 INFO L225 Difference]: With dead ends: 255 [2021-07-13 19:34:54,182 INFO L226 Difference]: Without dead ends: 255 [2021-07-13 19:34:54,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:34:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-13 19:34:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-07-13 19:34:54,184 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) [2021-07-13 19:34:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 441 transitions. [2021-07-13 19:34:54,185 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 441 transitions. Word has length 19 [2021-07-13 19:34:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:54,185 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 441 transitions. [2021-07-13 19:34:54,185 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) [2021-07-13 19:34:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 441 transitions. [2021-07-13 19:34:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:54,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:54,185 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:54,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3102,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:54,386 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:54,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:54,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1060412860, now seen corresponding path program 417 times [2021-07-13 19:34:54,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:54,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079850591] [2021-07-13 19:34:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:54,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:54,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079850591] [2021-07-13 19:34:54,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079850591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:54,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788617817] [2021-07-13 19:34:54,505 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 [2021-07-13 19:34:54,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:34:54,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:54,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:34:54,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:54,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788617817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:54,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:54,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:34:54,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281021778] [2021-07-13 19:34:54,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:34:54,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:54,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:34:54,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:34:54,715 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) [2021-07-13 19:34:54,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:54,883 INFO L93 Difference]: Finished difference Result 234 states and 504 transitions. [2021-07-13 19:34:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:34:54,883 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 [2021-07-13 19:34:54,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:54,883 INFO L225 Difference]: With dead ends: 234 [2021-07-13 19:34:54,883 INFO L226 Difference]: Without dead ends: 234 [2021-07-13 19:34:54,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:34:54,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-13 19:34:54,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 196. [2021-07-13 19:34:54,885 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) [2021-07-13 19:34:54,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 428 transitions. [2021-07-13 19:34:54,885 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 428 transitions. Word has length 19 [2021-07-13 19:34:54,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:54,885 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 428 transitions. [2021-07-13 19:34:54,885 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) [2021-07-13 19:34:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 428 transitions. [2021-07-13 19:34:54,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:54,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:54,886 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:55,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3109,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:55,086 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:55,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:55,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1685578215, now seen corresponding path program 418 times [2021-07-13 19:34:55,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:55,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892543479] [2021-07-13 19:34:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:55,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:55,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892543479] [2021-07-13 19:34:55,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892543479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:55,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140496556] [2021-07-13 19:34:55,206 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 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 [2021-07-13 19:34:55,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:55,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:55,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:55,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:55,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140496556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:55,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:55,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:55,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581382750] [2021-07-13 19:34:55,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:55,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:55,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:55,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:55,402 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) [2021-07-13 19:34:55,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:55,557 INFO L93 Difference]: Finished difference Result 221 states and 478 transitions. [2021-07-13 19:34:55,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:55,558 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 [2021-07-13 19:34:55,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:55,558 INFO L225 Difference]: With dead ends: 221 [2021-07-13 19:34:55,558 INFO L226 Difference]: Without dead ends: 221 [2021-07-13 19:34:55,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 272.2ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:55,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-07-13 19:34:55,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 197. [2021-07-13 19:34:55,560 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) [2021-07-13 19:34:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 430 transitions. [2021-07-13 19:34:55,560 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 430 transitions. Word has length 19 [2021-07-13 19:34:55,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:55,560 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 430 transitions. [2021-07-13 19:34:55,560 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) [2021-07-13 19:34:55,560 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 430 transitions. [2021-07-13 19:34:55,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:55,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:55,561 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:55,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3114 [2021-07-13 19:34:55,761 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:55,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:55,761 INFO L82 PathProgramCache]: Analyzing trace with hash -888842463, now seen corresponding path program 419 times [2021-07-13 19:34:55,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:55,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306281994] [2021-07-13 19:34:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:55,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:55,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306281994] [2021-07-13 19:34:55,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306281994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:55,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471752710] [2021-07-13 19:34:55,877 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 [2021-07-13 19:34:55,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:34:55,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:55,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:55,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:56,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471752710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:56,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:56,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:56,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286369273] [2021-07-13 19:34:56,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:56,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:56,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:56,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:56,079 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) [2021-07-13 19:34:56,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:56,275 INFO L93 Difference]: Finished difference Result 240 states and 513 transitions. [2021-07-13 19:34:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:56,275 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 [2021-07-13 19:34:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:56,275 INFO L225 Difference]: With dead ends: 240 [2021-07-13 19:34:56,275 INFO L226 Difference]: Without dead ends: 237 [2021-07-13 19:34:56,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:56,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-13 19:34:56,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 198. [2021-07-13 19:34:56,277 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) [2021-07-13 19:34:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 433 transitions. [2021-07-13 19:34:56,277 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 433 transitions. Word has length 19 [2021-07-13 19:34:56,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:56,278 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 433 transitions. [2021-07-13 19:34:56,278 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) [2021-07-13 19:34:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 433 transitions. [2021-07-13 19:34:56,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:56,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:56,278 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:56,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3119,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:56,478 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:56,479 INFO L82 PathProgramCache]: Analyzing trace with hash 238553630, now seen corresponding path program 420 times [2021-07-13 19:34:56,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:56,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235530741] [2021-07-13 19:34:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:56,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:56,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235530741] [2021-07-13 19:34:56,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235530741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:56,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39611255] [2021-07-13 19:34:56,590 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 [2021-07-13 19:34:56,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:34:56,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:56,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:56,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:56,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39611255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:56,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:56,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:56,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771520514] [2021-07-13 19:34:56,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:56,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:56,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:56,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:56,816 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) [2021-07-13 19:34:56,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:56,997 INFO L93 Difference]: Finished difference Result 215 states and 464 transitions. [2021-07-13 19:34:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:56,997 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 [2021-07-13 19:34:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:56,997 INFO L225 Difference]: With dead ends: 215 [2021-07-13 19:34:56,997 INFO L226 Difference]: Without dead ends: 213 [2021-07-13 19:34:56,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 278.4ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:56,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-13 19:34:56,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2021-07-13 19:34:56,999 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) [2021-07-13 19:34:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 428 transitions. [2021-07-13 19:34:57,000 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 428 transitions. Word has length 19 [2021-07-13 19:34:57,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:57,000 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 428 transitions. [2021-07-13 19:34:57,000 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) [2021-07-13 19:34:57,000 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 428 transitions. [2021-07-13 19:34:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:57,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:57,000 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:57,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3126,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:57,201 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:57,201 INFO L82 PathProgramCache]: Analyzing trace with hash -382496197, now seen corresponding path program 421 times [2021-07-13 19:34:57,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:57,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796801104] [2021-07-13 19:34:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:57,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:57,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796801104] [2021-07-13 19:34:57,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796801104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:57,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822065643] [2021-07-13 19:34:57,310 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 [2021-07-13 19:34:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:57,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:57,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:57,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822065643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:57,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:57,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:57,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405392133] [2021-07-13 19:34:57,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:57,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:57,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:57,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:57,565 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) [2021-07-13 19:34:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:57,818 INFO L93 Difference]: Finished difference Result 210 states and 456 transitions. [2021-07-13 19:34:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:34:57,818 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 [2021-07-13 19:34:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:57,818 INFO L225 Difference]: With dead ends: 210 [2021-07-13 19:34:57,819 INFO L226 Difference]: Without dead ends: 210 [2021-07-13 19:34:57,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 404.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:34:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-13 19:34:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 198. [2021-07-13 19:34:57,820 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) [2021-07-13 19:34:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 432 transitions. [2021-07-13 19:34:57,821 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 432 transitions. Word has length 19 [2021-07-13 19:34:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:57,821 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 432 transitions. [2021-07-13 19:34:57,821 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) [2021-07-13 19:34:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 432 transitions. [2021-07-13 19:34:57,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:57,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:57,821 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:58,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:58,022 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:58,022 INFO L82 PathProgramCache]: Analyzing trace with hash -94945962, now seen corresponding path program 422 times [2021-07-13 19:34:58,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:58,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328990518] [2021-07-13 19:34:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:58,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:58,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328990518] [2021-07-13 19:34:58,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328990518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:58,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284375964] [2021-07-13 19:34:58,146 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 [2021-07-13 19:34:58,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:34:58,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:58,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:58,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:58,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284375964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:58,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:58,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:58,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629886121] [2021-07-13 19:34:58,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:58,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:58,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:58,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:58,341 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) [2021-07-13 19:34:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:58,683 INFO L93 Difference]: Finished difference Result 252 states and 536 transitions. [2021-07-13 19:34:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:34:58,683 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 [2021-07-13 19:34:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:58,683 INFO L225 Difference]: With dead ends: 252 [2021-07-13 19:34:58,683 INFO L226 Difference]: Without dead ends: 252 [2021-07-13 19:34:58,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:34:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-07-13 19:34:58,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 199. [2021-07-13 19:34:58,685 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) [2021-07-13 19:34:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 437 transitions. [2021-07-13 19:34:58,685 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 437 transitions. Word has length 19 [2021-07-13 19:34:58,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:58,686 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 437 transitions. [2021-07-13 19:34:58,686 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) [2021-07-13 19:34:58,686 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 437 transitions. [2021-07-13 19:34:58,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:58,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:58,686 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:58,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3142 [2021-07-13 19:34:58,886 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:58,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:58,887 INFO L82 PathProgramCache]: Analyzing trace with hash 207044318, now seen corresponding path program 423 times [2021-07-13 19:34:58,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:58,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597187235] [2021-07-13 19:34:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:59,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:59,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597187235] [2021-07-13 19:34:59,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597187235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:59,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683748061] [2021-07-13 19:34:59,011 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 [2021-07-13 19:34:59,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:34:59,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:59,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:59,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:59,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683748061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:59,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:59,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:59,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12112955] [2021-07-13 19:34:59,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:59,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:59,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:59,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:59,203 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) [2021-07-13 19:34:59,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:59,388 INFO L93 Difference]: Finished difference Result 227 states and 490 transitions. [2021-07-13 19:34:59,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:34:59,389 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 [2021-07-13 19:34:59,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:59,389 INFO L225 Difference]: With dead ends: 227 [2021-07-13 19:34:59,389 INFO L226 Difference]: Without dead ends: 227 [2021-07-13 19:34:59,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:34:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-13 19:34:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 195. [2021-07-13 19:34:59,391 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) [2021-07-13 19:34:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 426 transitions. [2021-07-13 19:34:59,391 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 426 transitions. Word has length 19 [2021-07-13 19:34:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:59,392 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 426 transitions. [2021-07-13 19:34:59,392 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) [2021-07-13 19:34:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 426 transitions. [2021-07-13 19:34:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:34:59,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:59,392 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:59,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3149,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:59,596 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:59,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:59,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1865631135, now seen corresponding path program 424 times [2021-07-13 19:34:59,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:59,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300697649] [2021-07-13 19:34:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:59,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:59,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300697649] [2021-07-13 19:34:59,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300697649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:59,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142421862] [2021-07-13 19:34:59,693 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 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 [2021-07-13 19:34:59,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:59,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:59,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:34:59,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:59,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142421862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:59,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:59,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:34:59,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32722737] [2021-07-13 19:34:59,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:34:59,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:59,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:34:59,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:34:59,961 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) [2021-07-13 19:35:00,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:00,191 INFO L93 Difference]: Finished difference Result 214 states and 462 transitions. [2021-07-13 19:35:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:35:00,192 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 [2021-07-13 19:35:00,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:00,192 INFO L225 Difference]: With dead ends: 214 [2021-07-13 19:35:00,192 INFO L226 Difference]: Without dead ends: 214 [2021-07-13 19:35:00,192 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 376.7ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:35:00,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-13 19:35:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 196. [2021-07-13 19:35:00,194 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) [2021-07-13 19:35:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 425 transitions. [2021-07-13 19:35:00,194 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 425 transitions. Word has length 19 [2021-07-13 19:35:00,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:00,194 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 425 transitions. [2021-07-13 19:35:00,194 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) [2021-07-13 19:35:00,194 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 425 transitions. [2021-07-13 19:35:00,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:00,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:00,195 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:00,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3154 [2021-07-13 19:35:00,395 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:00,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:00,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1578080900, now seen corresponding path program 425 times [2021-07-13 19:35:00,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:00,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342166096] [2021-07-13 19:35:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:00,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:00,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342166096] [2021-07-13 19:35:00,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342166096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:00,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375349045] [2021-07-13 19:35:00,489 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 [2021-07-13 19:35:00,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:35:00,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:00,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:00,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:00,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375349045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:00,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:00,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:00,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417045525] [2021-07-13 19:35:00,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:00,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:00,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:00,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:00,700 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) [2021-07-13 19:35:01,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:01,179 INFO L93 Difference]: Finished difference Result 263 states and 555 transitions. [2021-07-13 19:35:01,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:35:01,179 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 [2021-07-13 19:35:01,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:01,179 INFO L225 Difference]: With dead ends: 263 [2021-07-13 19:35:01,179 INFO L226 Difference]: Without dead ends: 263 [2021-07-13 19:35:01,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 526.2ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:35:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-13 19:35:01,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 198. [2021-07-13 19:35:01,181 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) [2021-07-13 19:35:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 433 transitions. [2021-07-13 19:35:01,182 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 433 transitions. Word has length 19 [2021-07-13 19:35:01,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:01,182 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 433 transitions. [2021-07-13 19:35:01,182 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) [2021-07-13 19:35:01,182 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 433 transitions. [2021-07-13 19:35:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:01,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:01,182 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:01,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3162,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:01,383 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:01,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:01,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1276090620, now seen corresponding path program 426 times [2021-07-13 19:35:01,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:01,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791459549] [2021-07-13 19:35:01,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:01,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:01,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791459549] [2021-07-13 19:35:01,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791459549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:01,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374276250] [2021-07-13 19:35:01,475 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 [2021-07-13 19:35:01,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:35:01,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:01,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:01,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:01,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374276250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:01,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:01,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:01,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927744340] [2021-07-13 19:35:01,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:01,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:01,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:01,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:01,678 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) [2021-07-13 19:35:02,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:02,059 INFO L93 Difference]: Finished difference Result 236 states and 507 transitions. [2021-07-13 19:35:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:35:02,059 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 [2021-07-13 19:35:02,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:02,060 INFO L225 Difference]: With dead ends: 236 [2021-07-13 19:35:02,060 INFO L226 Difference]: Without dead ends: 236 [2021-07-13 19:35:02,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 430.3ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:35:02,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-13 19:35:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 197. [2021-07-13 19:35:02,062 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) [2021-07-13 19:35:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 431 transitions. [2021-07-13 19:35:02,062 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 431 transitions. Word has length 19 [2021-07-13 19:35:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:02,062 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 431 transitions. [2021-07-13 19:35:02,062 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) [2021-07-13 19:35:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 431 transitions. [2021-07-13 19:35:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:02,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:02,062 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:02,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3169,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:02,263 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:02,263 INFO L82 PathProgramCache]: Analyzing trace with hash -769744354, now seen corresponding path program 427 times [2021-07-13 19:35:02,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:02,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352144837] [2021-07-13 19:35:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:02,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:02,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352144837] [2021-07-13 19:35:02,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352144837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:02,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307116574] [2021-07-13 19:35:02,359 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 [2021-07-13 19:35:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:02,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:02,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:02,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307116574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:02,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:02,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:02,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898474852] [2021-07-13 19:35:02,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:02,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:02,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:02,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:02,568 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) [2021-07-13 19:35:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:02,757 INFO L93 Difference]: Finished difference Result 230 states and 493 transitions. [2021-07-13 19:35:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:35:02,757 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 [2021-07-13 19:35:02,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:02,757 INFO L225 Difference]: With dead ends: 230 [2021-07-13 19:35:02,757 INFO L226 Difference]: Without dead ends: 230 [2021-07-13 19:35:02,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:02,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-13 19:35:02,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 191. [2021-07-13 19:35:02,759 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) [2021-07-13 19:35:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-07-13 19:35:02,759 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 19 [2021-07-13 19:35:02,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:02,759 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-07-13 19:35:02,760 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) [2021-07-13 19:35:02,760 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-07-13 19:35:02,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:02,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:02,760 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:02,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3174,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:02,960 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:02,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:02,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1049111361, now seen corresponding path program 428 times [2021-07-13 19:35:02,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:02,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28406557] [2021-07-13 19:35:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:03,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:03,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28406557] [2021-07-13 19:35:03,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28406557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:03,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522321521] [2021-07-13 19:35:03,087 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 [2021-07-13 19:35:03,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:03,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:03,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:35:03,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:03,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522321521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:03,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:03,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:03,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269376328] [2021-07-13 19:35:03,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:03,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:03,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:03,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:03,286 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) [2021-07-13 19:35:03,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:03,472 INFO L93 Difference]: Finished difference Result 217 states and 467 transitions. [2021-07-13 19:35:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:35:03,472 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 [2021-07-13 19:35:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:03,473 INFO L225 Difference]: With dead ends: 217 [2021-07-13 19:35:03,473 INFO L226 Difference]: Without dead ends: 217 [2021-07-13 19:35:03,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 277.9ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:35:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-13 19:35:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2021-07-13 19:35:03,474 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) [2021-07-13 19:35:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 417 transitions. [2021-07-13 19:35:03,475 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 417 transitions. Word has length 19 [2021-07-13 19:35:03,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:03,475 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 417 transitions. [2021-07-13 19:35:03,475 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) [2021-07-13 19:35:03,475 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 417 transitions. [2021-07-13 19:35:03,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:03,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:03,475 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:03,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3179,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:03,676 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:03,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:03,676 INFO L82 PathProgramCache]: Analyzing trace with hash -252375609, now seen corresponding path program 429 times [2021-07-13 19:35:03,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:03,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239716305] [2021-07-13 19:35:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:03,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:03,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239716305] [2021-07-13 19:35:03,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239716305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:03,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659726969] [2021-07-13 19:35:03,800 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 [2021-07-13 19:35:03,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:35:03,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:03,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:35:03,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:04,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659726969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:04,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:04,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:04,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292616431] [2021-07-13 19:35:04,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:04,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:04,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:04,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:04,007 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) [2021-07-13 19:35:04,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:04,220 INFO L93 Difference]: Finished difference Result 236 states and 502 transitions. [2021-07-13 19:35:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:35:04,221 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 [2021-07-13 19:35:04,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:04,221 INFO L225 Difference]: With dead ends: 236 [2021-07-13 19:35:04,221 INFO L226 Difference]: Without dead ends: 233 [2021-07-13 19:35:04,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 279.7ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:35:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-07-13 19:35:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 193. [2021-07-13 19:35:04,223 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) [2021-07-13 19:35:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 420 transitions. [2021-07-13 19:35:04,223 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 420 transitions. Word has length 19 [2021-07-13 19:35:04,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:04,223 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 420 transitions. [2021-07-13 19:35:04,223 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) [2021-07-13 19:35:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 420 transitions. [2021-07-13 19:35:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:04,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:04,224 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:04,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-07-13 19:35:04,424 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:04,424 INFO L82 PathProgramCache]: Analyzing trace with hash 875020484, now seen corresponding path program 430 times [2021-07-13 19:35:04,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:04,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913834207] [2021-07-13 19:35:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:04,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:04,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913834207] [2021-07-13 19:35:04,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913834207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:04,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863483538] [2021-07-13 19:35:04,546 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 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 [2021-07-13 19:35:04,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:04,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:04,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:04,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:04,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863483538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:04,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:04,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:04,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940149167] [2021-07-13 19:35:04,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:04,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:04,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:04,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:04,770 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) [2021-07-13 19:35:04,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:04,947 INFO L93 Difference]: Finished difference Result 211 states and 453 transitions. [2021-07-13 19:35:04,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:35:04,948 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 [2021-07-13 19:35:04,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:04,948 INFO L225 Difference]: With dead ends: 211 [2021-07-13 19:35:04,948 INFO L226 Difference]: Without dead ends: 209 [2021-07-13 19:35:04,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:35:04,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-07-13 19:35:04,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2021-07-13 19:35:04,950 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) [2021-07-13 19:35:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-07-13 19:35:04,950 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 19 [2021-07-13 19:35:04,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:04,950 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-07-13 19:35:04,950 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) [2021-07-13 19:35:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-07-13 19:35:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:04,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:04,951 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:05,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3192 [2021-07-13 19:35:05,151 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:05,151 INFO L82 PathProgramCache]: Analyzing trace with hash 253970657, now seen corresponding path program 431 times [2021-07-13 19:35:05,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:05,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729841639] [2021-07-13 19:35:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:05,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:05,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729841639] [2021-07-13 19:35:05,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729841639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:05,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729052218] [2021-07-13 19:35:05,264 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 [2021-07-13 19:35:05,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:35:05,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:05,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:05,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:05,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729052218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:05,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:05,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:05,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232166237] [2021-07-13 19:35:05,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:05,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:05,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:05,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:05,521 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) [2021-07-13 19:35:05,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:05,706 INFO L93 Difference]: Finished difference Result 208 states and 449 transitions. [2021-07-13 19:35:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:35:05,706 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 [2021-07-13 19:35:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:05,707 INFO L225 Difference]: With dead ends: 208 [2021-07-13 19:35:05,707 INFO L226 Difference]: Without dead ends: 208 [2021-07-13 19:35:05,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 338.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:35:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-13 19:35:05,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 193. [2021-07-13 19:35:05,708 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) [2021-07-13 19:35:05,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 419 transitions. [2021-07-13 19:35:05,709 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 419 transitions. Word has length 19 [2021-07-13 19:35:05,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:05,709 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 419 transitions. [2021-07-13 19:35:05,709 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) [2021-07-13 19:35:05,709 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 419 transitions. [2021-07-13 19:35:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:05,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:05,709 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:05,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3200,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:05,910 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:05,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:05,910 INFO L82 PathProgramCache]: Analyzing trace with hash 541520892, now seen corresponding path program 432 times [2021-07-13 19:35:05,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:05,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330565666] [2021-07-13 19:35:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:06,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:06,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330565666] [2021-07-13 19:35:06,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330565666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:06,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720647764] [2021-07-13 19:35:06,054 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 [2021-07-13 19:35:06,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:35:06,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:06,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:06,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:06,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720647764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:06,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:06,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:06,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276413407] [2021-07-13 19:35:06,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:06,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:06,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:06,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:06,260 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) [2021-07-13 19:35:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:06,592 INFO L93 Difference]: Finished difference Result 243 states and 515 transitions. [2021-07-13 19:35:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:35:06,592 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 [2021-07-13 19:35:06,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:06,592 INFO L225 Difference]: With dead ends: 243 [2021-07-13 19:35:06,592 INFO L226 Difference]: Without dead ends: 243 [2021-07-13 19:35:06,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 404.7ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:35:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-07-13 19:35:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 194. [2021-07-13 19:35:06,594 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) [2021-07-13 19:35:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 424 transitions. [2021-07-13 19:35:06,595 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 424 transitions. Word has length 19 [2021-07-13 19:35:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:06,595 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 424 transitions. [2021-07-13 19:35:06,595 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) [2021-07-13 19:35:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 424 transitions. [2021-07-13 19:35:06,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:06,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:06,595 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:06,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3208 [2021-07-13 19:35:06,796 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:06,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:06,796 INFO L82 PathProgramCache]: Analyzing trace with hash 843511172, now seen corresponding path program 433 times [2021-07-13 19:35:06,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:06,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146586284] [2021-07-13 19:35:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:06,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:06,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146586284] [2021-07-13 19:35:06,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146586284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:06,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128170315] [2021-07-13 19:35:06,919 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 [2021-07-13 19:35:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:06,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:06,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:07,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128170315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:07,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:07,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:07,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168082988] [2021-07-13 19:35:07,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:07,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:07,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:07,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:07,109 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) [2021-07-13 19:35:07,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:07,325 INFO L93 Difference]: Finished difference Result 220 states and 473 transitions. [2021-07-13 19:35:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:35:07,325 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 [2021-07-13 19:35:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:07,326 INFO L225 Difference]: With dead ends: 220 [2021-07-13 19:35:07,326 INFO L226 Difference]: Without dead ends: 220 [2021-07-13 19:35:07,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 315.9ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:35:07,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-13 19:35:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2021-07-13 19:35:07,327 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) [2021-07-13 19:35:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 413 transitions. [2021-07-13 19:35:07,328 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 413 transitions. Word has length 19 [2021-07-13 19:35:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:07,328 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 413 transitions. [2021-07-13 19:35:07,328 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) [2021-07-13 19:35:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 413 transitions. [2021-07-13 19:35:07,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:07,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:07,328 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:07,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3215,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:07,529 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:07,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:07,529 INFO L82 PathProgramCache]: Analyzing trace with hash -101768188, now seen corresponding path program 434 times [2021-07-13 19:35:07,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:07,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741239364] [2021-07-13 19:35:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:07,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:07,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741239364] [2021-07-13 19:35:07,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741239364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:07,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739837617] [2021-07-13 19:35:07,621 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 [2021-07-13 19:35:07,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:07,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:07,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:35:07,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:07,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739837617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:07,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:07,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:07,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273703348] [2021-07-13 19:35:07,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:07,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:07,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:07,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:07,868 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) [2021-07-13 19:35:08,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:08,453 INFO L93 Difference]: Finished difference Result 262 states and 552 transitions. [2021-07-13 19:35:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:35:08,453 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 [2021-07-13 19:35:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:08,453 INFO L225 Difference]: With dead ends: 262 [2021-07-13 19:35:08,453 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:35:08,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 635.6ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:35:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:35:08,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 193. [2021-07-13 19:35:08,455 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) [2021-07-13 19:35:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 423 transitions. [2021-07-13 19:35:08,456 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 423 transitions. Word has length 19 [2021-07-13 19:35:08,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:08,456 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 423 transitions. [2021-07-13 19:35:08,456 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) [2021-07-13 19:35:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 423 transitions. [2021-07-13 19:35:08,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:08,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:08,456 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:08,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3220 [2021-07-13 19:35:08,672 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:08,672 INFO L82 PathProgramCache]: Analyzing trace with hash -639623766, now seen corresponding path program 435 times [2021-07-13 19:35:08,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:08,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436755588] [2021-07-13 19:35:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:08,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:08,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436755588] [2021-07-13 19:35:08,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436755588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:08,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679670763] [2021-07-13 19:35:08,766 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 [2021-07-13 19:35:08,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:35:08,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:08,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:08,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:08,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679670763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:08,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:08,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:08,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182193176] [2021-07-13 19:35:08,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:08,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:08,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:08,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:08,967 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) [2021-07-13 19:35:09,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:09,376 INFO L93 Difference]: Finished difference Result 231 states and 497 transitions. [2021-07-13 19:35:09,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:35:09,376 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 [2021-07-13 19:35:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:09,376 INFO L225 Difference]: With dead ends: 231 [2021-07-13 19:35:09,376 INFO L226 Difference]: Without dead ends: 231 [2021-07-13 19:35:09,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 483.2ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:35:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-13 19:35:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 193. [2021-07-13 19:35:09,378 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) [2021-07-13 19:35:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 423 transitions. [2021-07-13 19:35:09,379 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 423 transitions. Word has length 19 [2021-07-13 19:35:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:09,379 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 423 transitions. [2021-07-13 19:35:09,379 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) [2021-07-13 19:35:09,379 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 423 transitions. [2021-07-13 19:35:09,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:09,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:09,379 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:09,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3226,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:09,580 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:09,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:09,580 INFO L82 PathProgramCache]: Analyzing trace with hash -133277500, now seen corresponding path program 436 times [2021-07-13 19:35:09,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:09,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055009119] [2021-07-13 19:35:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:09,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:09,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055009119] [2021-07-13 19:35:09,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055009119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:09,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837340931] [2021-07-13 19:35:09,680 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 [2021-07-13 19:35:09,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:09,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:09,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:09,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:09,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837340931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:09,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:09,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:09,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013648586] [2021-07-13 19:35:09,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:09,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:09,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:09,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:09,880 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) [2021-07-13 19:35:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:10,100 INFO L93 Difference]: Finished difference Result 226 states and 485 transitions. [2021-07-13 19:35:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:35:10,100 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 [2021-07-13 19:35:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:10,101 INFO L225 Difference]: With dead ends: 226 [2021-07-13 19:35:10,101 INFO L226 Difference]: Without dead ends: 226 [2021-07-13 19:35:10,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-13 19:35:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 190. [2021-07-13 19:35:10,102 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) [2021-07-13 19:35:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 413 transitions. [2021-07-13 19:35:10,103 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 413 transitions. Word has length 19 [2021-07-13 19:35:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:10,103 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 413 transitions. [2021-07-13 19:35:10,103 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) [2021-07-13 19:35:10,103 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 413 transitions. [2021-07-13 19:35:10,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:10,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:10,103 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:10,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3231 [2021-07-13 19:35:10,304 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:10,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:10,304 INFO L82 PathProgramCache]: Analyzing trace with hash 38292897, now seen corresponding path program 437 times [2021-07-13 19:35:10,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:10,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513297728] [2021-07-13 19:35:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:10,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:10,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513297728] [2021-07-13 19:35:10,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513297728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:10,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327503922] [2021-07-13 19:35:10,398 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 [2021-07-13 19:35:10,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:35:10,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:10,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:10,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:10,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327503922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:10,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:10,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:10,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98917561] [2021-07-13 19:35:10,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:10,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:10,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:10,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:10,690 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) [2021-07-13 19:35:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:11,157 INFO L93 Difference]: Finished difference Result 216 states and 461 transitions. [2021-07-13 19:35:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:35:11,157 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 [2021-07-13 19:35:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:11,157 INFO L225 Difference]: With dead ends: 216 [2021-07-13 19:35:11,157 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 19:35:11,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 574.8ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:35:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 19:35:11,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 193. [2021-07-13 19:35:11,159 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) [2021-07-13 19:35:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 419 transitions. [2021-07-13 19:35:11,159 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 419 transitions. Word has length 19 [2021-07-13 19:35:11,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:11,159 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 419 transitions. [2021-07-13 19:35:11,159 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) [2021-07-13 19:35:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 419 transitions. [2021-07-13 19:35:11,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:11,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:11,160 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:11,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3236,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:11,360 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:11,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:11,361 INFO L82 PathProgramCache]: Analyzing trace with hash 325843132, now seen corresponding path program 438 times [2021-07-13 19:35:11,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:11,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014788417] [2021-07-13 19:35:11,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:11,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:11,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014788417] [2021-07-13 19:35:11,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014788417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:11,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774861644] [2021-07-13 19:35:11,452 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 [2021-07-13 19:35:11,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:35:11,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:11,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:11,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:11,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774861644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:11,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:11,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:11,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010587124] [2021-07-13 19:35:11,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:11,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:11,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:11,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:11,674 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) [2021-07-13 19:35:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:12,307 INFO L93 Difference]: Finished difference Result 254 states and 537 transitions. [2021-07-13 19:35:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:35:12,307 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 [2021-07-13 19:35:12,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:12,308 INFO L225 Difference]: With dead ends: 254 [2021-07-13 19:35:12,308 INFO L226 Difference]: Without dead ends: 254 [2021-07-13 19:35:12,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 701.8ms TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:35:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-13 19:35:12,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 196. [2021-07-13 19:35:12,310 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) [2021-07-13 19:35:12,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 430 transitions. [2021-07-13 19:35:12,310 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 430 transitions. Word has length 19 [2021-07-13 19:35:12,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:12,310 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 430 transitions. [2021-07-13 19:35:12,310 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) [2021-07-13 19:35:12,310 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 430 transitions. [2021-07-13 19:35:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:12,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:12,310 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:12,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:12,511 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:12,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:12,511 INFO L82 PathProgramCache]: Analyzing trace with hash 627833412, now seen corresponding path program 439 times [2021-07-13 19:35:12,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:12,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300471642] [2021-07-13 19:35:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:12,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:12,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300471642] [2021-07-13 19:35:12,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300471642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:12,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11732410] [2021-07-13 19:35:12,605 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 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 [2021-07-13 19:35:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:12,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:12,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:12,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11732410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:12,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:12,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:12,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753083787] [2021-07-13 19:35:12,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:12,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:12,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:12,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:12,828 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) [2021-07-13 19:35:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:13,432 INFO L93 Difference]: Finished difference Result 241 states and 517 transitions. [2021-07-13 19:35:13,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:35:13,433 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 [2021-07-13 19:35:13,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:13,433 INFO L225 Difference]: With dead ends: 241 [2021-07-13 19:35:13,433 INFO L226 Difference]: Without dead ends: 241 [2021-07-13 19:35:13,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 627.1ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:35:13,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-13 19:35:13,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 195. [2021-07-13 19:35:13,435 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) [2021-07-13 19:35:13,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 428 transitions. [2021-07-13 19:35:13,435 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 428 transitions. Word has length 19 [2021-07-13 19:35:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:13,435 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 428 transitions. [2021-07-13 19:35:13,435 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) [2021-07-13 19:35:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 428 transitions. [2021-07-13 19:35:13,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:13,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:13,436 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:13,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3251,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:13,636 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:13,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:13,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1134179678, now seen corresponding path program 440 times [2021-07-13 19:35:13,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:13,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117112228] [2021-07-13 19:35:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:13,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:13,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117112228] [2021-07-13 19:35:13,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117112228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:13,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640109254] [2021-07-13 19:35:13,729 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 [2021-07-13 19:35:13,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:13,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:13,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:13,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:13,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640109254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:13,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:13,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:13,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806917041] [2021-07-13 19:35:13,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:13,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:13,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:13,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:13,942 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) [2021-07-13 19:35:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:14,472 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2021-07-13 19:35:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:35:14,473 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 [2021-07-13 19:35:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:14,473 INFO L225 Difference]: With dead ends: 238 [2021-07-13 19:35:14,473 INFO L226 Difference]: Without dead ends: 238 [2021-07-13 19:35:14,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 559.9ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:35:14,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-13 19:35:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 194. [2021-07-13 19:35:14,475 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) [2021-07-13 19:35:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 426 transitions. [2021-07-13 19:35:14,475 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 426 transitions. Word has length 19 [2021-07-13 19:35:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:14,475 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 426 transitions. [2021-07-13 19:35:14,475 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) [2021-07-13 19:35:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 426 transitions. [2021-07-13 19:35:14,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:14,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:14,476 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:14,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3256,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:14,676 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:14,676 INFO L82 PathProgramCache]: Analyzing trace with hash -348955260, now seen corresponding path program 441 times [2021-07-13 19:35:14,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:14,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676678075] [2021-07-13 19:35:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:14,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:14,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676678075] [2021-07-13 19:35:14,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676678075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:14,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848481577] [2021-07-13 19:35:14,779 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 [2021-07-13 19:35:14,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:35:14,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:14,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:35:14,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:14,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848481577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:14,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:14,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:14,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116152670] [2021-07-13 19:35:14,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:14,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:14,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:14,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:14,984 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) [2021-07-13 19:35:15,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:15,272 INFO L93 Difference]: Finished difference Result 218 states and 469 transitions. [2021-07-13 19:35:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:35:15,272 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 [2021-07-13 19:35:15,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:15,273 INFO L225 Difference]: With dead ends: 218 [2021-07-13 19:35:15,273 INFO L226 Difference]: Without dead ends: 218 [2021-07-13 19:35:15,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 339.3ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:35:15,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-07-13 19:35:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 189. [2021-07-13 19:35:15,274 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) [2021-07-13 19:35:15,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-07-13 19:35:15,275 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-07-13 19:35:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:15,275 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-07-13 19:35:15,275 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) [2021-07-13 19:35:15,275 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-07-13 19:35:15,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:15,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:15,275 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:15,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:15,489 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:15,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:15,489 INFO L82 PathProgramCache]: Analyzing trace with hash -657700315, now seen corresponding path program 442 times [2021-07-13 19:35:15,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:15,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880016231] [2021-07-13 19:35:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:15,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:15,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880016231] [2021-07-13 19:35:15,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880016231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:15,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373618271] [2021-07-13 19:35:15,582 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 [2021-07-13 19:35:15,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:15,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:15,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:15,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:15,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373618271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:15,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:15,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:15,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182553567] [2021-07-13 19:35:15,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:15,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:15,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:15,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:15,821 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) [2021-07-13 19:35:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:15,919 INFO L93 Difference]: Finished difference Result 198 states and 429 transitions. [2021-07-13 19:35:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:35:15,919 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 [2021-07-13 19:35:15,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:15,920 INFO L225 Difference]: With dead ends: 198 [2021-07-13 19:35:15,920 INFO L226 Difference]: Without dead ends: 198 [2021-07-13 19:35:15,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:15,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-07-13 19:35:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 189. [2021-07-13 19:35:15,921 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) [2021-07-13 19:35:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-07-13 19:35:15,922 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-07-13 19:35:15,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:15,922 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-07-13 19:35:15,922 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) [2021-07-13 19:35:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-07-13 19:35:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:15,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:15,922 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:16,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3266,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:16,123 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:16,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:16,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1728695779, now seen corresponding path program 443 times [2021-07-13 19:35:16,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:16,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910614113] [2021-07-13 19:35:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:16,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:16,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910614113] [2021-07-13 19:35:16,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910614113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:16,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602930180] [2021-07-13 19:35:16,219 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 [2021-07-13 19:35:16,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:35:16,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:16,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:16,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:16,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602930180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:16,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:16,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:16,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485463508] [2021-07-13 19:35:16,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:16,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:16,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:16,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:16,432 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) [2021-07-13 19:35:16,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:16,767 INFO L93 Difference]: Finished difference Result 207 states and 447 transitions. [2021-07-13 19:35:16,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:35:16,768 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 [2021-07-13 19:35:16,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:16,768 INFO L225 Difference]: With dead ends: 207 [2021-07-13 19:35:16,768 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 19:35:16,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 430.4ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:35:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 19:35:16,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-07-13 19:35:16,770 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) [2021-07-13 19:35:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-07-13 19:35:16,770 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-07-13 19:35:16,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:16,770 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-07-13 19:35:16,770 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) [2021-07-13 19:35:16,770 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-07-13 19:35:16,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:16,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:16,770 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:16,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3271 [2021-07-13 19:35:16,971 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:16,971 INFO L82 PathProgramCache]: Analyzing trace with hash -931960027, now seen corresponding path program 444 times [2021-07-13 19:35:16,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:16,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948196397] [2021-07-13 19:35:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:17,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:17,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948196397] [2021-07-13 19:35:17,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948196397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:17,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211082264] [2021-07-13 19:35:17,065 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 [2021-07-13 19:35:17,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:35:17,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:17,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:17,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:17,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211082264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:17,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:17,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:17,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987907368] [2021-07-13 19:35:17,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:17,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:17,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:17,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:17,277 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) [2021-07-13 19:35:17,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:17,648 INFO L93 Difference]: Finished difference Result 207 states and 447 transitions. [2021-07-13 19:35:17,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:35:17,649 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 [2021-07-13 19:35:17,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:17,649 INFO L225 Difference]: With dead ends: 207 [2021-07-13 19:35:17,649 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 19:35:17,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 427.2ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:35:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 19:35:17,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-07-13 19:35:17,651 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) [2021-07-13 19:35:17,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-07-13 19:35:17,651 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-07-13 19:35:17,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:17,651 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-07-13 19:35:17,651 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) [2021-07-13 19:35:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-07-13 19:35:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:17,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:17,651 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:17,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-07-13 19:35:17,853 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:17,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:17,853 INFO L82 PathProgramCache]: Analyzing trace with hash -644409792, now seen corresponding path program 445 times [2021-07-13 19:35:17,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:17,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95974925] [2021-07-13 19:35:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:17,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:17,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95974925] [2021-07-13 19:35:17,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95974925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:17,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692484578] [2021-07-13 19:35:17,948 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 [2021-07-13 19:35:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:17,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:17,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:18,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692484578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:18,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:18,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:18,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117234013] [2021-07-13 19:35:18,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:18,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:18,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:18,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:18,205 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) [2021-07-13 19:35:18,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:18,353 INFO L93 Difference]: Finished difference Result 199 states and 430 transitions. [2021-07-13 19:35:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:35:18,354 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 [2021-07-13 19:35:18,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:18,354 INFO L225 Difference]: With dead ends: 199 [2021-07-13 19:35:18,354 INFO L226 Difference]: Without dead ends: 199 [2021-07-13 19:35:18,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 302.4ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:18,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-13 19:35:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 184. [2021-07-13 19:35:18,356 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) [2021-07-13 19:35:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 397 transitions. [2021-07-13 19:35:18,356 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 397 transitions. Word has length 19 [2021-07-13 19:35:18,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:18,356 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 397 transitions. [2021-07-13 19:35:18,356 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) [2021-07-13 19:35:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 397 transitions. [2021-07-13 19:35:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:18,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:18,356 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:18,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3283,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:18,557 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:18,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:18,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1083136579, now seen corresponding path program 446 times [2021-07-13 19:35:18,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:18,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898680781] [2021-07-13 19:35:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:18,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:18,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898680781] [2021-07-13 19:35:18,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898680781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:18,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731357729] [2021-07-13 19:35:18,675 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 [2021-07-13 19:35:18,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:18,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:18,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:35:18,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:18,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731357729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:18,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:18,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:18,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907614566] [2021-07-13 19:35:18,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:18,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:18,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:18,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:18,878 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) [2021-07-13 19:35:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:19,225 INFO L93 Difference]: Finished difference Result 207 states and 443 transitions. [2021-07-13 19:35:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:35:19,225 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 [2021-07-13 19:35:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:19,225 INFO L225 Difference]: With dead ends: 207 [2021-07-13 19:35:19,225 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 19:35:19,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 381.3ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:35:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 19:35:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 184. [2021-07-13 19:35:19,227 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) [2021-07-13 19:35:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 397 transitions. [2021-07-13 19:35:19,227 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 397 transitions. Word has length 19 [2021-07-13 19:35:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:19,227 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 397 transitions. [2021-07-13 19:35:19,227 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) [2021-07-13 19:35:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 397 transitions. [2021-07-13 19:35:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:19,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:19,228 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:19,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3291 [2021-07-13 19:35:19,428 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:19,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:19,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1879872331, now seen corresponding path program 447 times [2021-07-13 19:35:19,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:19,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156698472] [2021-07-13 19:35:19,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:19,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:19,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156698472] [2021-07-13 19:35:19,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156698472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:19,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540688189] [2021-07-13 19:35:19,540 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 [2021-07-13 19:35:19,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:35:19,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:19,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:35:19,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:19,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540688189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:19,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:19,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:19,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658809545] [2021-07-13 19:35:19,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:19,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:19,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:19,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:19,815 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) [2021-07-13 19:35:20,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:20,279 INFO L93 Difference]: Finished difference Result 223 states and 470 transitions. [2021-07-13 19:35:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:35:20,279 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 [2021-07-13 19:35:20,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:20,279 INFO L225 Difference]: With dead ends: 223 [2021-07-13 19:35:20,279 INFO L226 Difference]: Without dead ends: 220 [2021-07-13 19:35:20,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 557.8ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:35:20,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-13 19:35:20,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 184. [2021-07-13 19:35:20,281 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) [2021-07-13 19:35:20,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 396 transitions. [2021-07-13 19:35:20,282 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 396 transitions. Word has length 19 [2021-07-13 19:35:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:20,282 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 396 transitions. [2021-07-13 19:35:20,282 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) [2021-07-13 19:35:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 396 transitions. [2021-07-13 19:35:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:20,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:20,282 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:20,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3296 [2021-07-13 19:35:20,482 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:20,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:20,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1287698872, now seen corresponding path program 448 times [2021-07-13 19:35:20,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:20,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937596984] [2021-07-13 19:35:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:20,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:20,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937596984] [2021-07-13 19:35:20,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937596984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:20,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410520803] [2021-07-13 19:35:20,598 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 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 [2021-07-13 19:35:20,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:20,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:20,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:20,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:20,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410520803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:20,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:20,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:20,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737265156] [2021-07-13 19:35:20,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:20,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:20,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:20,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:20,833 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) [2021-07-13 19:35:21,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:21,132 INFO L93 Difference]: Finished difference Result 199 states and 423 transitions. [2021-07-13 19:35:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:35:21,132 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 [2021-07-13 19:35:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:21,132 INFO L225 Difference]: With dead ends: 199 [2021-07-13 19:35:21,132 INFO L226 Difference]: Without dead ends: 197 [2021-07-13 19:35:21,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 397.0ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:35:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-13 19:35:21,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 182. [2021-07-13 19:35:21,134 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) [2021-07-13 19:35:21,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 391 transitions. [2021-07-13 19:35:21,134 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 391 transitions. Word has length 19 [2021-07-13 19:35:21,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:21,135 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 391 transitions. [2021-07-13 19:35:21,135 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) [2021-07-13 19:35:21,135 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 391 transitions. [2021-07-13 19:35:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:21,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:21,135 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:21,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3304,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:21,335 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:21,336 INFO L82 PathProgramCache]: Analyzing trace with hash -781352606, now seen corresponding path program 449 times [2021-07-13 19:35:21,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:21,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222725838] [2021-07-13 19:35:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:21,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:21,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222725838] [2021-07-13 19:35:21,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222725838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:21,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926451538] [2021-07-13 19:35:21,457 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 [2021-07-13 19:35:21,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:35:21,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:21,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:21,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:21,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926451538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:21,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:21,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:21,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466585367] [2021-07-13 19:35:21,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:21,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:21,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:21,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:21,663 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) [2021-07-13 19:35:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:22,023 INFO L93 Difference]: Finished difference Result 266 states and 541 transitions. [2021-07-13 19:35:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:35:22,023 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 [2021-07-13 19:35:22,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:22,024 INFO L225 Difference]: With dead ends: 266 [2021-07-13 19:35:22,024 INFO L226 Difference]: Without dead ends: 266 [2021-07-13 19:35:22,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:35:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-07-13 19:35:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 185. [2021-07-13 19:35:22,026 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) [2021-07-13 19:35:22,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 400 transitions. [2021-07-13 19:35:22,026 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 400 transitions. Word has length 19 [2021-07-13 19:35:22,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:22,026 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 400 transitions. [2021-07-13 19:35:22,026 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) [2021-07-13 19:35:22,026 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 400 transitions. [2021-07-13 19:35:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:22,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:22,027 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:22,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3312,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:22,227 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:22,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:22,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1319208184, now seen corresponding path program 450 times [2021-07-13 19:35:22,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:22,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204907660] [2021-07-13 19:35:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:22,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:22,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204907660] [2021-07-13 19:35:22,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204907660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:22,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353204187] [2021-07-13 19:35:22,343 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 [2021-07-13 19:35:22,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:35:22,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:22,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:22,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:22,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353204187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:22,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:22,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:22,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193063515] [2021-07-13 19:35:22,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:22,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:22,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:22,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:22,550 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) [2021-07-13 19:35:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:22,736 INFO L93 Difference]: Finished difference Result 211 states and 449 transitions. [2021-07-13 19:35:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:35:22,736 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 [2021-07-13 19:35:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:22,736 INFO L225 Difference]: With dead ends: 211 [2021-07-13 19:35:22,737 INFO L226 Difference]: Without dead ends: 211 [2021-07-13 19:35:22,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:35:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-13 19:35:22,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2021-07-13 19:35:22,738 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) [2021-07-13 19:35:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 387 transitions. [2021-07-13 19:35:22,739 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 387 transitions. Word has length 19 [2021-07-13 19:35:22,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:22,739 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 387 transitions. [2021-07-13 19:35:22,739 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) [2021-07-13 19:35:22,739 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 387 transitions. [2021-07-13 19:35:22,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:22,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:22,739 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:22,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3319 [2021-07-13 19:35:22,940 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:22,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:22,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1944373539, now seen corresponding path program 451 times [2021-07-13 19:35:22,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:22,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161783177] [2021-07-13 19:35:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:23,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:23,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161783177] [2021-07-13 19:35:23,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161783177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:23,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244463321] [2021-07-13 19:35:23,056 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 [2021-07-13 19:35:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:23,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:23,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:23,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244463321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:23,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:23,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:23,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403145020] [2021-07-13 19:35:23,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:23,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:23,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:23,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:23,258 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) [2021-07-13 19:35:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:23,521 INFO L93 Difference]: Finished difference Result 206 states and 438 transitions. [2021-07-13 19:35:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:35:23,521 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 [2021-07-13 19:35:23,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:23,522 INFO L225 Difference]: With dead ends: 206 [2021-07-13 19:35:23,522 INFO L226 Difference]: Without dead ends: 206 [2021-07-13 19:35:23,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 367.5ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:35:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-07-13 19:35:23,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 180. [2021-07-13 19:35:23,523 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) [2021-07-13 19:35:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 387 transitions. [2021-07-13 19:35:23,524 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 387 transitions. Word has length 19 [2021-07-13 19:35:23,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:23,524 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 387 transitions. [2021-07-13 19:35:23,524 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) [2021-07-13 19:35:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 387 transitions. [2021-07-13 19:35:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:23,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:23,524 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:23,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3324 [2021-07-13 19:35:23,725 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:23,725 INFO L82 PathProgramCache]: Analyzing trace with hash 222508706, now seen corresponding path program 452 times [2021-07-13 19:35:23,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:23,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629972121] [2021-07-13 19:35:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:23,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:23,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629972121] [2021-07-13 19:35:23,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629972121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:23,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955146951] [2021-07-13 19:35:23,844 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 [2021-07-13 19:35:23,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:23,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:23,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:23,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:24,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955146951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:24,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:24,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:24,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10974066] [2021-07-13 19:35:24,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:24,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:24,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:24,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:24,080 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) [2021-07-13 19:35:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:24,297 INFO L93 Difference]: Finished difference Result 221 states and 453 transitions. [2021-07-13 19:35:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:35:24,298 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 [2021-07-13 19:35:24,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:24,298 INFO L225 Difference]: With dead ends: 221 [2021-07-13 19:35:24,298 INFO L226 Difference]: Without dead ends: 217 [2021-07-13 19:35:24,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 364.9ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:35:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-13 19:35:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 183. [2021-07-13 19:35:24,300 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) [2021-07-13 19:35:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-07-13 19:35:24,300 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-07-13 19:35:24,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:24,300 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-07-13 19:35:24,300 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) [2021-07-13 19:35:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-07-13 19:35:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:24,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:24,301 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:24,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3329,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:24,501 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash -20241694, now seen corresponding path program 453 times [2021-07-13 19:35:24,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:24,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874337960] [2021-07-13 19:35:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:24,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:24,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874337960] [2021-07-13 19:35:24,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874337960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:24,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519031439] [2021-07-13 19:35:24,616 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 [2021-07-13 19:35:24,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:35:24,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:24,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:35:24,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:24,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519031439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:24,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:24,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:24,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853248678] [2021-07-13 19:35:24,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:24,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:24,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:24,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:24,855 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) [2021-07-13 19:35:25,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:25,073 INFO L93 Difference]: Finished difference Result 195 states and 416 transitions. [2021-07-13 19:35:25,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:35:25,074 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 [2021-07-13 19:35:25,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:25,074 INFO L225 Difference]: With dead ends: 195 [2021-07-13 19:35:25,074 INFO L226 Difference]: Without dead ends: 195 [2021-07-13 19:35:25,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 325.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:35:25,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-07-13 19:35:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 178. [2021-07-13 19:35:25,076 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) [2021-07-13 19:35:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 382 transitions. [2021-07-13 19:35:25,076 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 382 transitions. Word has length 19 [2021-07-13 19:35:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:25,076 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 382 transitions. [2021-07-13 19:35:25,076 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) [2021-07-13 19:35:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 382 transitions. [2021-07-13 19:35:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:25,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:25,076 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:25,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3336 [2021-07-13 19:35:25,277 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:25,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:25,277 INFO L82 PathProgramCache]: Analyzing trace with hash -641291521, now seen corresponding path program 454 times [2021-07-13 19:35:25,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:25,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364188579] [2021-07-13 19:35:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:25,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:25,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364188579] [2021-07-13 19:35:25,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364188579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:25,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122997639] [2021-07-13 19:35:25,396 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 [2021-07-13 19:35:25,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:25,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:25,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:25,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:25,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122997639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:25,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:25,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:25,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487225463] [2021-07-13 19:35:25,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:25,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:25,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:25,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:25,659 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) [2021-07-13 19:35:26,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:26,536 INFO L93 Difference]: Finished difference Result 290 states and 582 transitions. [2021-07-13 19:35:26,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:35:26,537 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 [2021-07-13 19:35:26,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:26,537 INFO L225 Difference]: With dead ends: 290 [2021-07-13 19:35:26,537 INFO L226 Difference]: Without dead ends: 290 [2021-07-13 19:35:26,538 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 906.0ms TimeCoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:35:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-07-13 19:35:26,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 183. [2021-07-13 19:35:26,539 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) [2021-07-13 19:35:26,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-07-13 19:35:26,540 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-07-13 19:35:26,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:26,540 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-07-13 19:35:26,540 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) [2021-07-13 19:35:26,540 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-07-13 19:35:26,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:26,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:26,540 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:26,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3344,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:26,741 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:26,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:26,741 INFO L82 PathProgramCache]: Analyzing trace with hash -353741286, now seen corresponding path program 455 times [2021-07-13 19:35:26,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:26,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771857236] [2021-07-13 19:35:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:26,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:26,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771857236] [2021-07-13 19:35:26,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771857236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:26,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079216602] [2021-07-13 19:35:26,856 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 [2021-07-13 19:35:26,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:35:26,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:26,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:26,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:27,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079216602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:27,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:27,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:27,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85978980] [2021-07-13 19:35:27,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:27,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:27,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:27,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:27,062 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) [2021-07-13 19:35:27,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:27,505 INFO L93 Difference]: Finished difference Result 266 states and 543 transitions. [2021-07-13 19:35:27,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:35:27,506 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 [2021-07-13 19:35:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:27,506 INFO L225 Difference]: With dead ends: 266 [2021-07-13 19:35:27,506 INFO L226 Difference]: Without dead ends: 266 [2021-07-13 19:35:27,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 516.4ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:35:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-07-13 19:35:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 184. [2021-07-13 19:35:27,508 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) [2021-07-13 19:35:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 400 transitions. [2021-07-13 19:35:27,509 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 400 transitions. Word has length 19 [2021-07-13 19:35:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:27,509 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 400 transitions. [2021-07-13 19:35:27,509 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) [2021-07-13 19:35:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 400 transitions. [2021-07-13 19:35:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:27,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:27,509 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:27,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3352 [2021-07-13 19:35:27,710 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:27,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:27,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1981190685, now seen corresponding path program 456 times [2021-07-13 19:35:27,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:27,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92469513] [2021-07-13 19:35:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:27,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:27,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92469513] [2021-07-13 19:35:27,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92469513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:27,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536348127] [2021-07-13 19:35:27,822 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 [2021-07-13 19:35:27,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:35:27,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:27,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:27,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:28,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536348127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:28,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:28,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:28,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29538840] [2021-07-13 19:35:28,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:28,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:28,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:28,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:28,079 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) [2021-07-13 19:35:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:28,385 INFO L93 Difference]: Finished difference Result 203 states and 433 transitions. [2021-07-13 19:35:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:35:28,385 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 [2021-07-13 19:35:28,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:28,386 INFO L225 Difference]: With dead ends: 203 [2021-07-13 19:35:28,386 INFO L226 Difference]: Without dead ends: 197 [2021-07-13 19:35:28,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 445.8ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:35:28,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-13 19:35:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 184. [2021-07-13 19:35:28,387 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) [2021-07-13 19:35:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 399 transitions. [2021-07-13 19:35:28,387 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 399 transitions. Word has length 19 [2021-07-13 19:35:28,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:28,388 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 399 transitions. [2021-07-13 19:35:28,388 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) [2021-07-13 19:35:28,388 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 399 transitions. [2021-07-13 19:35:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:28,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:28,388 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:28,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3359 [2021-07-13 19:35:28,588 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:28,589 INFO L82 PathProgramCache]: Analyzing trace with hash -51751006, now seen corresponding path program 457 times [2021-07-13 19:35:28,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:28,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693168132] [2021-07-13 19:35:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:28,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:28,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693168132] [2021-07-13 19:35:28,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693168132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:28,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108593462] [2021-07-13 19:35:28,703 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 [2021-07-13 19:35:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:28,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:28,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108593462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:28,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:28,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:28,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970409162] [2021-07-13 19:35:28,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:28,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:28,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:28,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:28,897 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) [2021-07-13 19:35:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:29,108 INFO L93 Difference]: Finished difference Result 210 states and 448 transitions. [2021-07-13 19:35:29,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:35:29,108 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 [2021-07-13 19:35:29,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:29,108 INFO L225 Difference]: With dead ends: 210 [2021-07-13 19:35:29,108 INFO L226 Difference]: Without dead ends: 210 [2021-07-13 19:35:29,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:35:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-13 19:35:29,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 181. [2021-07-13 19:35:29,110 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) [2021-07-13 19:35:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-07-13 19:35:29,110 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-07-13 19:35:29,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:29,110 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-07-13 19:35:29,110 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) [2021-07-13 19:35:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-07-13 19:35:29,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:29,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:29,111 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:29,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:29,311 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:29,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:29,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2124426459, now seen corresponding path program 458 times [2021-07-13 19:35:29,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:29,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932718163] [2021-07-13 19:35:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:29,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:29,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932718163] [2021-07-13 19:35:29,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932718163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:29,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321324900] [2021-07-13 19:35:29,406 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 [2021-07-13 19:35:29,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:29,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:29,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:29,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:29,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321324900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:29,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:29,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:29,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189372399] [2021-07-13 19:35:29,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:29,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:29,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:29,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:29,678 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) [2021-07-13 19:35:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:29,869 INFO L93 Difference]: Finished difference Result 193 states and 414 transitions. [2021-07-13 19:35:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:35:29,870 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 [2021-07-13 19:35:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:29,870 INFO L225 Difference]: With dead ends: 193 [2021-07-13 19:35:29,870 INFO L226 Difference]: Without dead ends: 193 [2021-07-13 19:35:29,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-13 19:35:29,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 184. [2021-07-13 19:35:29,872 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) [2021-07-13 19:35:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 396 transitions. [2021-07-13 19:35:29,872 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 396 transitions. Word has length 19 [2021-07-13 19:35:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:29,872 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 396 transitions. [2021-07-13 19:35:29,872 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) [2021-07-13 19:35:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 396 transitions. [2021-07-13 19:35:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:29,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:29,872 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:30,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3372,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:30,073 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:30,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1836876224, now seen corresponding path program 459 times [2021-07-13 19:35:30,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:30,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996139754] [2021-07-13 19:35:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:30,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:30,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996139754] [2021-07-13 19:35:30,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996139754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:30,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427406133] [2021-07-13 19:35:30,164 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 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 [2021-07-13 19:35:30,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:35:30,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:30,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:35:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:30,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427406133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:30,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:30,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:30,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547716182] [2021-07-13 19:35:30,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:30,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:30,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:30,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:30,384 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) [2021-07-13 19:35:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:30,974 INFO L93 Difference]: Finished difference Result 276 states and 564 transitions. [2021-07-13 19:35:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:35:30,974 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 [2021-07-13 19:35:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:30,974 INFO L225 Difference]: With dead ends: 276 [2021-07-13 19:35:30,974 INFO L226 Difference]: Without dead ends: 276 [2021-07-13 19:35:30,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 581.7ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:35:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-07-13 19:35:30,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 186. [2021-07-13 19:35:30,976 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) [2021-07-13 19:35:30,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 404 transitions. [2021-07-13 19:35:30,977 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 404 transitions. Word has length 19 [2021-07-13 19:35:30,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:30,977 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 404 transitions. [2021-07-13 19:35:30,977 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) [2021-07-13 19:35:30,977 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 404 transitions. [2021-07-13 19:35:30,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:30,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:30,977 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:31,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3380,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:31,178 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:31,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:31,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1534885944, now seen corresponding path program 460 times [2021-07-13 19:35:31,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:31,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912992271] [2021-07-13 19:35:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:31,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:31,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912992271] [2021-07-13 19:35:31,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912992271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:31,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798518601] [2021-07-13 19:35:31,271 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 [2021-07-13 19:35:31,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:31,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:31,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:31,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:31,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798518601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:31,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:31,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:31,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153763869] [2021-07-13 19:35:31,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:31,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:31,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:31,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:31,473 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) [2021-07-13 19:35:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:31,801 INFO L93 Difference]: Finished difference Result 228 states and 486 transitions. [2021-07-13 19:35:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:35:31,801 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 [2021-07-13 19:35:31,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:31,802 INFO L225 Difference]: With dead ends: 228 [2021-07-13 19:35:31,802 INFO L226 Difference]: Without dead ends: 228 [2021-07-13 19:35:31,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 396.9ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:35:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-13 19:35:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 185. [2021-07-13 19:35:31,803 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) [2021-07-13 19:35:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 402 transitions. [2021-07-13 19:35:31,804 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 402 transitions. Word has length 19 [2021-07-13 19:35:31,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:31,804 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 402 transitions. [2021-07-13 19:35:31,804 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) [2021-07-13 19:35:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 402 transitions. [2021-07-13 19:35:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:31,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:31,804 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:32,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,461 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:32,004 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:32,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:32,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1028539678, now seen corresponding path program 461 times [2021-07-13 19:35:32,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:32,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542714456] [2021-07-13 19:35:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:32,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:32,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542714456] [2021-07-13 19:35:32,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542714456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:32,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226309269] [2021-07-13 19:35:32,097 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 [2021-07-13 19:35:32,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:35:32,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:32,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:35:32,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:32,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226309269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:32,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:32,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:32,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426750690] [2021-07-13 19:35:32,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:32,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:32,327 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) [2021-07-13 19:35:32,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:32,502 INFO L93 Difference]: Finished difference Result 222 states and 472 transitions. [2021-07-13 19:35:32,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:35:32,502 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 [2021-07-13 19:35:32,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:32,502 INFO L225 Difference]: With dead ends: 222 [2021-07-13 19:35:32,502 INFO L226 Difference]: Without dead ends: 222 [2021-07-13 19:35:32,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-07-13 19:35:32,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 181. [2021-07-13 19:35:32,504 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) [2021-07-13 19:35:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-07-13 19:35:32,504 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-07-13 19:35:32,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:32,504 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-07-13 19:35:32,504 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) [2021-07-13 19:35:32,504 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-07-13 19:35:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:32,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:32,505 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:32,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-07-13 19:35:32,705 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1307906685, now seen corresponding path program 462 times [2021-07-13 19:35:32,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:32,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735092461] [2021-07-13 19:35:32,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:32,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:32,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735092461] [2021-07-13 19:35:32,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735092461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:32,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174442842] [2021-07-13 19:35:32,824 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 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 [2021-07-13 19:35:32,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:35:32,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:32,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:32,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:33,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174442842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:33,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:33,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:33,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859043438] [2021-07-13 19:35:33,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:33,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:33,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:33,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:33,026 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) [2021-07-13 19:35:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:33,401 INFO L93 Difference]: Finished difference Result 205 states and 438 transitions. [2021-07-13 19:35:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:35:33,402 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 [2021-07-13 19:35:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:33,402 INFO L225 Difference]: With dead ends: 205 [2021-07-13 19:35:33,402 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 19:35:33,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:35:33,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 19:35:33,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 181. [2021-07-13 19:35:33,404 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) [2021-07-13 19:35:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-07-13 19:35:33,404 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-07-13 19:35:33,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:33,404 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-07-13 19:35:33,404 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) [2021-07-13 19:35:33,404 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-07-13 19:35:33,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:33,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:33,405 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:33,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3399,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:33,605 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:33,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:33,605 INFO L82 PathProgramCache]: Analyzing trace with hash -511170933, now seen corresponding path program 463 times [2021-07-13 19:35:33,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:33,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403022551] [2021-07-13 19:35:33,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:33,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:33,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403022551] [2021-07-13 19:35:33,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403022551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:33,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770399385] [2021-07-13 19:35:33,722 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 [2021-07-13 19:35:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:33,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:33,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:33,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770399385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:33,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:33,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:33,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595114300] [2021-07-13 19:35:33,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:33,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:33,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:33,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:33,923 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) [2021-07-13 19:35:34,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:34,275 INFO L93 Difference]: Finished difference Result 221 states and 466 transitions. [2021-07-13 19:35:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:35:34,275 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 [2021-07-13 19:35:34,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:34,275 INFO L225 Difference]: With dead ends: 221 [2021-07-13 19:35:34,275 INFO L226 Difference]: Without dead ends: 218 [2021-07-13 19:35:34,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 375.6ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:35:34,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-07-13 19:35:34,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 181. [2021-07-13 19:35:34,277 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) [2021-07-13 19:35:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 389 transitions. [2021-07-13 19:35:34,277 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 389 transitions. Word has length 19 [2021-07-13 19:35:34,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:34,277 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 389 transitions. [2021-07-13 19:35:34,277 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) [2021-07-13 19:35:34,277 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 389 transitions. [2021-07-13 19:35:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:34,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:34,278 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:34,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3404 [2021-07-13 19:35:34,478 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:34,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:34,478 INFO L82 PathProgramCache]: Analyzing trace with hash 616225160, now seen corresponding path program 464 times [2021-07-13 19:35:34,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:34,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051627774] [2021-07-13 19:35:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:34,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:34,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051627774] [2021-07-13 19:35:34,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051627774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:34,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002631964] [2021-07-13 19:35:34,598 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 [2021-07-13 19:35:34,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:34,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:34,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:34,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:34,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002631964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:34,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:34,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:34,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988104158] [2021-07-13 19:35:34,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:34,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:34,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:34,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:34,829 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) [2021-07-13 19:35:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:35,058 INFO L93 Difference]: Finished difference Result 193 states and 412 transitions. [2021-07-13 19:35:35,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:35:35,058 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 [2021-07-13 19:35:35,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:35,058 INFO L225 Difference]: With dead ends: 193 [2021-07-13 19:35:35,058 INFO L226 Difference]: Without dead ends: 193 [2021-07-13 19:35:35,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:35:35,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-13 19:35:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 176. [2021-07-13 19:35:35,060 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) [2021-07-13 19:35:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 378 transitions. [2021-07-13 19:35:35,060 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 378 transitions. Word has length 19 [2021-07-13 19:35:35,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:35,060 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 378 transitions. [2021-07-13 19:35:35,060 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) [2021-07-13 19:35:35,060 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 378 transitions. [2021-07-13 19:35:35,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:35,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:35,061 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:35,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3411,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:35,261 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:35,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:35,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1122571426, now seen corresponding path program 465 times [2021-07-13 19:35:35,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:35,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386620838] [2021-07-13 19:35:35,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:35,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:35,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386620838] [2021-07-13 19:35:35,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386620838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:35,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528915196] [2021-07-13 19:35:35,378 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 [2021-07-13 19:35:35,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:35:35,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:35,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:35:35,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:35,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528915196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:35,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:35,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:35,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228024988] [2021-07-13 19:35:35,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:35,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:35,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:35,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:35,585 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) [2021-07-13 19:35:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:35,926 INFO L93 Difference]: Finished difference Result 244 states and 502 transitions. [2021-07-13 19:35:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:35:35,927 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 [2021-07-13 19:35:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:35,927 INFO L225 Difference]: With dead ends: 244 [2021-07-13 19:35:35,927 INFO L226 Difference]: Without dead ends: 244 [2021-07-13 19:35:35,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 373.2ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:35:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-13 19:35:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 183. [2021-07-13 19:35:35,929 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) [2021-07-13 19:35:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-07-13 19:35:35,929 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-07-13 19:35:35,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:35,929 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-07-13 19:35:35,929 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) [2021-07-13 19:35:35,930 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-07-13 19:35:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:35,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:35,930 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:36,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3419 [2021-07-13 19:35:36,130 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:36,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:36,131 INFO L82 PathProgramCache]: Analyzing trace with hash 584715848, now seen corresponding path program 466 times [2021-07-13 19:35:36,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:36,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839778505] [2021-07-13 19:35:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:36,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:36,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839778505] [2021-07-13 19:35:36,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839778505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:36,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990485563] [2021-07-13 19:35:36,252 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 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 [2021-07-13 19:35:36,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:36,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:36,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:36,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:36,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990485563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:36,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:36,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:36,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68231020] [2021-07-13 19:35:36,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:36,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:36,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:36,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:36,453 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) [2021-07-13 19:35:36,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:36,697 INFO L93 Difference]: Finished difference Result 209 states and 444 transitions. [2021-07-13 19:35:36,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:35:36,697 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 [2021-07-13 19:35:36,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:36,697 INFO L225 Difference]: With dead ends: 209 [2021-07-13 19:35:36,697 INFO L226 Difference]: Without dead ends: 209 [2021-07-13 19:35:36,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:35:36,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-07-13 19:35:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 175. [2021-07-13 19:35:36,699 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) [2021-07-13 19:35:36,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 376 transitions. [2021-07-13 19:35:36,699 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 376 transitions. Word has length 19 [2021-07-13 19:35:36,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:36,699 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 376 transitions. [2021-07-13 19:35:36,699 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) [2021-07-13 19:35:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 376 transitions. [2021-07-13 19:35:36,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:36,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:36,700 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:36,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3426,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:36,900 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:36,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:36,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1695154842, now seen corresponding path program 467 times [2021-07-13 19:35:36,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:36,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116888898] [2021-07-13 19:35:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:36,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:36,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116888898] [2021-07-13 19:35:36,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116888898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:36,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868661965] [2021-07-13 19:35:36,995 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 [2021-07-13 19:35:37,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:35:37,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:37,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:37,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:37,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868661965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:37,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:37,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:37,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934265384] [2021-07-13 19:35:37,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:37,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:37,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:37,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:37,199 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) [2021-07-13 19:35:37,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:37,609 INFO L93 Difference]: Finished difference Result 227 states and 473 transitions. [2021-07-13 19:35:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:35:37,609 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 [2021-07-13 19:35:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:37,610 INFO L225 Difference]: With dead ends: 227 [2021-07-13 19:35:37,610 INFO L226 Difference]: Without dead ends: 225 [2021-07-13 19:35:37,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 437.8ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:35:37,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-13 19:35:37,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 180. [2021-07-13 19:35:37,611 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) [2021-07-13 19:35:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-07-13 19:35:37,612 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-07-13 19:35:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:37,612 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-07-13 19:35:37,612 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) [2021-07-13 19:35:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-07-13 19:35:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:37,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:37,612 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:37,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3431,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:37,813 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:37,813 INFO L82 PathProgramCache]: Analyzing trace with hash -360563512, now seen corresponding path program 468 times [2021-07-13 19:35:37,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:37,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36164475] [2021-07-13 19:35:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:37,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:37,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36164475] [2021-07-13 19:35:37,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36164475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:37,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986107719] [2021-07-13 19:35:37,905 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 [2021-07-13 19:35:37,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:35:37,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:37,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:37,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:38,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986107719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:38,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:38,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:38,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726186113] [2021-07-13 19:35:38,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:38,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:38,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:38,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:38,108 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) [2021-07-13 19:35:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:38,572 INFO L93 Difference]: Finished difference Result 240 states and 500 transitions. [2021-07-13 19:35:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:35:38,572 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 [2021-07-13 19:35:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:38,572 INFO L225 Difference]: With dead ends: 240 [2021-07-13 19:35:38,572 INFO L226 Difference]: Without dead ends: 240 [2021-07-13 19:35:38,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 498.7ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:35:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-13 19:35:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 180. [2021-07-13 19:35:38,574 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) [2021-07-13 19:35:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-07-13 19:35:38,574 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-07-13 19:35:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:38,575 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-07-13 19:35:38,575 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) [2021-07-13 19:35:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-07-13 19:35:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:38,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:38,575 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:38,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3439,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:38,775 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:38,776 INFO L82 PathProgramCache]: Analyzing trace with hash -898419090, now seen corresponding path program 469 times [2021-07-13 19:35:38,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:38,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003947280] [2021-07-13 19:35:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:38,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:38,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003947280] [2021-07-13 19:35:38,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003947280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:38,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111365334] [2021-07-13 19:35:38,871 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 [2021-07-13 19:35:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:38,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:38,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:39,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111365334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:39,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:39,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:39,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135740961] [2021-07-13 19:35:39,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:39,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:39,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:39,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:39,071 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) [2021-07-13 19:35:39,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:39,414 INFO L93 Difference]: Finished difference Result 222 states and 470 transitions. [2021-07-13 19:35:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:35:39,414 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 [2021-07-13 19:35:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:39,415 INFO L225 Difference]: With dead ends: 222 [2021-07-13 19:35:39,415 INFO L226 Difference]: Without dead ends: 222 [2021-07-13 19:35:39,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:35:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-07-13 19:35:39,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 180. [2021-07-13 19:35:39,416 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) [2021-07-13 19:35:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-07-13 19:35:39,417 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-07-13 19:35:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:39,417 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-07-13 19:35:39,417 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) [2021-07-13 19:35:39,417 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-07-13 19:35:39,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:39,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:39,417 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:39,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3446,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:39,618 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:39,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:39,618 INFO L82 PathProgramCache]: Analyzing trace with hash -392072824, now seen corresponding path program 470 times [2021-07-13 19:35:39,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:39,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784448854] [2021-07-13 19:35:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:39,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:39,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784448854] [2021-07-13 19:35:39,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784448854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:39,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344082764] [2021-07-13 19:35:39,717 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 [2021-07-13 19:35:39,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:39,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:39,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:39,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:39,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344082764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:39,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:39,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:39,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086026443] [2021-07-13 19:35:39,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:39,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:39,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:39,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:39,909 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) [2021-07-13 19:35:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:40,132 INFO L93 Difference]: Finished difference Result 215 states and 455 transitions. [2021-07-13 19:35:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:35:40,132 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 [2021-07-13 19:35:40,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:40,133 INFO L225 Difference]: With dead ends: 215 [2021-07-13 19:35:40,133 INFO L226 Difference]: Without dead ends: 215 [2021-07-13 19:35:40,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-07-13 19:35:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 175. [2021-07-13 19:35:40,134 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) [2021-07-13 19:35:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-07-13 19:35:40,134 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-07-13 19:35:40,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:40,135 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-07-13 19:35:40,135 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) [2021-07-13 19:35:40,135 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-07-13 19:35:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:40,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:40,135 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:40,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3451 [2021-07-13 19:35:40,335 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:40,336 INFO L82 PathProgramCache]: Analyzing trace with hash -220502427, now seen corresponding path program 471 times [2021-07-13 19:35:40,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:40,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977481662] [2021-07-13 19:35:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:40,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:40,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977481662] [2021-07-13 19:35:40,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977481662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:40,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517901795] [2021-07-13 19:35:40,429 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 [2021-07-13 19:35:40,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:35:40,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:40,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:35:40,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:40,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517901795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:40,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:40,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:40,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829689117] [2021-07-13 19:35:40,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:40,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:40,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:40,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:40,720 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) [2021-07-13 19:35:41,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:41,255 INFO L93 Difference]: Finished difference Result 199 states and 419 transitions. [2021-07-13 19:35:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:35:41,256 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 [2021-07-13 19:35:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:41,256 INFO L225 Difference]: With dead ends: 199 [2021-07-13 19:35:41,256 INFO L226 Difference]: Without dead ends: 187 [2021-07-13 19:35:41,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 620.8ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:35:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-13 19:35:41,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 179. [2021-07-13 19:35:41,258 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) [2021-07-13 19:35:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 383 transitions. [2021-07-13 19:35:41,258 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 383 transitions. Word has length 19 [2021-07-13 19:35:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:41,258 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 383 transitions. [2021-07-13 19:35:41,258 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) [2021-07-13 19:35:41,258 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 383 transitions. [2021-07-13 19:35:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:41,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:41,258 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:41,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3456,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:41,459 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:41,459 INFO L82 PathProgramCache]: Analyzing trace with hash 67047808, now seen corresponding path program 472 times [2021-07-13 19:35:41,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:41,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259809336] [2021-07-13 19:35:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:41,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:41,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259809336] [2021-07-13 19:35:41,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259809336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:41,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458526170] [2021-07-13 19:35:41,551 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 [2021-07-13 19:35:41,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:41,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:41,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:41,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:41,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458526170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:41,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:41,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:41,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035877852] [2021-07-13 19:35:41,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:41,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:41,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:41,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:41,770 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) [2021-07-13 19:35:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:42,572 INFO L93 Difference]: Finished difference Result 247 states and 509 transitions. [2021-07-13 19:35:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:35:42,572 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 [2021-07-13 19:35:42,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:42,572 INFO L225 Difference]: With dead ends: 247 [2021-07-13 19:35:42,572 INFO L226 Difference]: Without dead ends: 247 [2021-07-13 19:35:42,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 785.4ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:35:42,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-13 19:35:42,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 182. [2021-07-13 19:35:42,574 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) [2021-07-13 19:35:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 394 transitions. [2021-07-13 19:35:42,575 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 394 transitions. Word has length 19 [2021-07-13 19:35:42,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:42,575 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 394 transitions. [2021-07-13 19:35:42,575 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) [2021-07-13 19:35:42,575 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 394 transitions. [2021-07-13 19:35:42,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:42,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:42,575 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:42,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:42,776 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:42,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:42,776 INFO L82 PathProgramCache]: Analyzing trace with hash 369038088, now seen corresponding path program 473 times [2021-07-13 19:35:42,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:42,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406512459] [2021-07-13 19:35:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:42,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:42,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406512459] [2021-07-13 19:35:42,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406512459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:42,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994756344] [2021-07-13 19:35:42,870 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 [2021-07-13 19:35:42,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:35:42,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:42,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:35:42,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:43,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994756344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:43,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:43,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:43,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684085090] [2021-07-13 19:35:43,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:43,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:43,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:43,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:43,175 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) [2021-07-13 19:35:43,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:43,791 INFO L93 Difference]: Finished difference Result 227 states and 481 transitions. [2021-07-13 19:35:43,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:35:43,791 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 [2021-07-13 19:35:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:43,792 INFO L225 Difference]: With dead ends: 227 [2021-07-13 19:35:43,792 INFO L226 Difference]: Without dead ends: 227 [2021-07-13 19:35:43,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 672.9ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:35:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-13 19:35:43,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 181. [2021-07-13 19:35:43,794 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) [2021-07-13 19:35:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 392 transitions. [2021-07-13 19:35:43,794 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 392 transitions. Word has length 19 [2021-07-13 19:35:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:43,794 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 392 transitions. [2021-07-13 19:35:43,794 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) [2021-07-13 19:35:43,794 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 392 transitions. [2021-07-13 19:35:43,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:43,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:43,794 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:43,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3471 [2021-07-13 19:35:43,995 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:43,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:43,995 INFO L82 PathProgramCache]: Analyzing trace with hash 875384354, now seen corresponding path program 474 times [2021-07-13 19:35:43,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:43,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004292504] [2021-07-13 19:35:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:44,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:44,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004292504] [2021-07-13 19:35:44,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004292504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:44,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914112631] [2021-07-13 19:35:44,089 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 [2021-07-13 19:35:44,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:35:44,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:44,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:44,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:44,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914112631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:44,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:44,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:44,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920829958] [2021-07-13 19:35:44,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:44,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:44,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:44,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:44,306 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) [2021-07-13 19:35:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:44,789 INFO L93 Difference]: Finished difference Result 224 states and 476 transitions. [2021-07-13 19:35:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:35:44,789 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 [2021-07-13 19:35:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:44,789 INFO L225 Difference]: With dead ends: 224 [2021-07-13 19:35:44,789 INFO L226 Difference]: Without dead ends: 224 [2021-07-13 19:35:44,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 558.9ms TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:35:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-13 19:35:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 180. [2021-07-13 19:35:44,791 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) [2021-07-13 19:35:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 390 transitions. [2021-07-13 19:35:44,791 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 390 transitions. Word has length 19 [2021-07-13 19:35:44,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:44,791 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 390 transitions. [2021-07-13 19:35:44,791 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) [2021-07-13 19:35:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 390 transitions. [2021-07-13 19:35:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:44,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:44,792 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:44,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3478,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:44,992 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:44,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:44,993 INFO L82 PathProgramCache]: Analyzing trace with hash -607750584, now seen corresponding path program 475 times [2021-07-13 19:35:44,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:44,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062306887] [2021-07-13 19:35:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:45,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:45,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062306887] [2021-07-13 19:35:45,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062306887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:45,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922598955] [2021-07-13 19:35:45,082 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 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 [2021-07-13 19:35:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:45,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:45,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:45,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922598955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:45,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:45,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:45,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267392004] [2021-07-13 19:35:45,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:45,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:45,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:45,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:45,286 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) [2021-07-13 19:35:45,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:45,554 INFO L93 Difference]: Finished difference Result 204 states and 433 transitions. [2021-07-13 19:35:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:35:45,555 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 [2021-07-13 19:35:45,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:45,555 INFO L225 Difference]: With dead ends: 204 [2021-07-13 19:35:45,555 INFO L226 Difference]: Without dead ends: 204 [2021-07-13 19:35:45,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 344.1ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:35:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-13 19:35:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 175. [2021-07-13 19:35:45,557 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) [2021-07-13 19:35:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-07-13 19:35:45,557 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-07-13 19:35:45,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:45,557 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-07-13 19:35:45,557 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) [2021-07-13 19:35:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-07-13 19:35:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:45,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:45,557 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:45,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3483 [2021-07-13 19:35:45,758 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:45,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:45,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1039160257, now seen corresponding path program 476 times [2021-07-13 19:35:45,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:45,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349997471] [2021-07-13 19:35:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:45,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:45,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349997471] [2021-07-13 19:35:45,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349997471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:45,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122343047] [2021-07-13 19:35:45,874 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 [2021-07-13 19:35:45,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:45,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:45,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:35:45,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:46,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122343047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:46,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:46,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:46,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886274762] [2021-07-13 19:35:46,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:46,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:46,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:46,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:46,108 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) [2021-07-13 19:35:46,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:46,493 INFO L93 Difference]: Finished difference Result 211 states and 445 transitions. [2021-07-13 19:35:46,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:35:46,493 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 [2021-07-13 19:35:46,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:46,493 INFO L225 Difference]: With dead ends: 211 [2021-07-13 19:35:46,493 INFO L226 Difference]: Without dead ends: 211 [2021-07-13 19:35:46,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:35:46,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-13 19:35:46,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 175. [2021-07-13 19:35:46,495 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) [2021-07-13 19:35:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-07-13 19:35:46,495 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-07-13 19:35:46,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:46,495 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-07-13 19:35:46,495 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) [2021-07-13 19:35:46,495 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-07-13 19:35:46,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:46,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:46,496 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:46,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3488,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:46,696 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:46,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:46,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1127721988, now seen corresponding path program 477 times [2021-07-13 19:35:46,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:46,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20350195] [2021-07-13 19:35:46,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:46,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:46,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20350195] [2021-07-13 19:35:46,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20350195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:46,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217848164] [2021-07-13 19:35:46,811 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 [2021-07-13 19:35:46,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:35:46,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:46,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:46,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:47,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217848164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:47,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:47,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:47,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280693781] [2021-07-13 19:35:47,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:47,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:47,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:47,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:47,045 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) [2021-07-13 19:35:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:47,497 INFO L93 Difference]: Finished difference Result 213 states and 439 transitions. [2021-07-13 19:35:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:35:47,497 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 [2021-07-13 19:35:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:47,497 INFO L225 Difference]: With dead ends: 213 [2021-07-13 19:35:47,497 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 19:35:47,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:35:47,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 19:35:47,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 175. [2021-07-13 19:35:47,499 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) [2021-07-13 19:35:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 371 transitions. [2021-07-13 19:35:47,499 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 371 transitions. Word has length 19 [2021-07-13 19:35:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:47,499 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 371 transitions. [2021-07-13 19:35:47,499 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) [2021-07-13 19:35:47,500 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 371 transitions. [2021-07-13 19:35:47,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:47,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:47,500 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:47,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3492 [2021-07-13 19:35:47,700 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:47,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:47,700 INFO L82 PathProgramCache]: Analyzing trace with hash -242424505, now seen corresponding path program 478 times [2021-07-13 19:35:47,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:47,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357450737] [2021-07-13 19:35:47,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:47,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:47,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357450737] [2021-07-13 19:35:47,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357450737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:47,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595758623] [2021-07-13 19:35:47,828 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 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 [2021-07-13 19:35:47,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:47,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:47,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:47,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:48,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595758623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:48,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:48,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:48,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146829130] [2021-07-13 19:35:48,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:48,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:48,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:48,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:48,023 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) [2021-07-13 19:35:48,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:48,484 INFO L93 Difference]: Finished difference Result 220 states and 456 transitions. [2021-07-13 19:35:48,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:35:48,484 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 [2021-07-13 19:35:48,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:48,484 INFO L225 Difference]: With dead ends: 220 [2021-07-13 19:35:48,484 INFO L226 Difference]: Without dead ends: 217 [2021-07-13 19:35:48,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 467.3ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:35:48,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-13 19:35:48,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 175. [2021-07-13 19:35:48,486 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) [2021-07-13 19:35:48,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 370 transitions. [2021-07-13 19:35:48,486 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 370 transitions. Word has length 19 [2021-07-13 19:35:48,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:48,487 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 370 transitions. [2021-07-13 19:35:48,487 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) [2021-07-13 19:35:48,487 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 370 transitions. [2021-07-13 19:35:48,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:48,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:48,490 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:48,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3499,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:48,700 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:48,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:48,700 INFO L82 PathProgramCache]: Analyzing trace with hash 884971588, now seen corresponding path program 479 times [2021-07-13 19:35:48,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:48,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123253273] [2021-07-13 19:35:48,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:48,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:48,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123253273] [2021-07-13 19:35:48,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123253273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:48,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278833896] [2021-07-13 19:35:48,813 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 [2021-07-13 19:35:48,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:35:48,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:48,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:48,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:49,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278833896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:49,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:49,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:49,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415760806] [2021-07-13 19:35:49,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:49,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:49,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:49,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:49,042 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) [2021-07-13 19:35:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:49,338 INFO L93 Difference]: Finished difference Result 196 states and 410 transitions. [2021-07-13 19:35:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:35:49,338 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 [2021-07-13 19:35:49,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:49,338 INFO L225 Difference]: With dead ends: 196 [2021-07-13 19:35:49,338 INFO L226 Difference]: Without dead ends: 196 [2021-07-13 19:35:49,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:35:49,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-07-13 19:35:49,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 170. [2021-07-13 19:35:49,340 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) [2021-07-13 19:35:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 359 transitions. [2021-07-13 19:35:49,340 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 359 transitions. Word has length 19 [2021-07-13 19:35:49,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:49,340 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 359 transitions. [2021-07-13 19:35:49,340 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) [2021-07-13 19:35:49,340 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 359 transitions. [2021-07-13 19:35:49,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:49,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:49,341 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:49,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3506 [2021-07-13 19:35:49,541 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:49,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1391317854, now seen corresponding path program 480 times [2021-07-13 19:35:49,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:49,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623163328] [2021-07-13 19:35:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:49,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:49,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623163328] [2021-07-13 19:35:49,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623163328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:49,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736144790] [2021-07-13 19:35:49,657 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 [2021-07-13 19:35:49,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:35:49,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:49,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:49,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:49,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736144790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:49,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:49,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:49,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514775840] [2021-07-13 19:35:49,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:49,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:49,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:49,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:49,856 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) [2021-07-13 19:35:50,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:50,205 INFO L93 Difference]: Finished difference Result 242 states and 497 transitions. [2021-07-13 19:35:50,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:35:50,205 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 [2021-07-13 19:35:50,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:50,206 INFO L225 Difference]: With dead ends: 242 [2021-07-13 19:35:50,206 INFO L226 Difference]: Without dead ends: 242 [2021-07-13 19:35:50,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 376.6ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:35:50,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-13 19:35:50,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 174. [2021-07-13 19:35:50,208 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) [2021-07-13 19:35:50,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 369 transitions. [2021-07-13 19:35:50,208 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 369 transitions. Word has length 19 [2021-07-13 19:35:50,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:50,208 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 369 transitions. [2021-07-13 19:35:50,208 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) [2021-07-13 19:35:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 369 transitions. [2021-07-13 19:35:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:50,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:50,208 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:50,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3514,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:50,409 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:50,409 INFO L82 PathProgramCache]: Analyzing trace with hash 853462276, now seen corresponding path program 481 times [2021-07-13 19:35:50,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:50,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325720224] [2021-07-13 19:35:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:50,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:50,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325720224] [2021-07-13 19:35:50,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325720224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:50,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847476362] [2021-07-13 19:35:50,526 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 [2021-07-13 19:35:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:50,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:50,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:50,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847476362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:50,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:50,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:50,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441392821] [2021-07-13 19:35:50,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:50,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:50,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:50,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:50,721 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) [2021-07-13 19:35:51,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:51,124 INFO L93 Difference]: Finished difference Result 210 states and 438 transitions. [2021-07-13 19:35:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:35:51,124 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 [2021-07-13 19:35:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:51,124 INFO L225 Difference]: With dead ends: 210 [2021-07-13 19:35:51,124 INFO L226 Difference]: Without dead ends: 210 [2021-07-13 19:35:51,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:35:51,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-13 19:35:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 170. [2021-07-13 19:35:51,126 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) [2021-07-13 19:35:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 359 transitions. [2021-07-13 19:35:51,126 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 359 transitions. Word has length 19 [2021-07-13 19:35:51,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:51,126 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 359 transitions. [2021-07-13 19:35:51,126 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) [2021-07-13 19:35:51,126 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 359 transitions. [2021-07-13 19:35:51,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:51,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:51,127 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:51,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:51,327 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:51,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:51,327 INFO L82 PathProgramCache]: Analyzing trace with hash -91817084, now seen corresponding path program 482 times [2021-07-13 19:35:51,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:51,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166450646] [2021-07-13 19:35:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:51,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:51,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166450646] [2021-07-13 19:35:51,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166450646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:51,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026769692] [2021-07-13 19:35:51,420 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 [2021-07-13 19:35:51,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:51,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:51,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:51,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:51,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026769692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:51,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:51,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:51,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518400677] [2021-07-13 19:35:51,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:51,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:51,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:51,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:51,619 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) [2021-07-13 19:35:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:52,128 INFO L93 Difference]: Finished difference Result 251 states and 508 transitions. [2021-07-13 19:35:52,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:35:52,129 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 [2021-07-13 19:35:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:52,129 INFO L225 Difference]: With dead ends: 251 [2021-07-13 19:35:52,129 INFO L226 Difference]: Without dead ends: 251 [2021-07-13 19:35:52,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 501.4ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:35:52,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-13 19:35:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 176. [2021-07-13 19:35:52,131 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) [2021-07-13 19:35:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 375 transitions. [2021-07-13 19:35:52,131 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 375 transitions. Word has length 19 [2021-07-13 19:35:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:52,131 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 375 transitions. [2021-07-13 19:35:52,131 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) [2021-07-13 19:35:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 375 transitions. [2021-07-13 19:35:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:52,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:52,132 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:52,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3526,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:52,332 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:52,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash -629672662, now seen corresponding path program 483 times [2021-07-13 19:35:52,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:52,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070010205] [2021-07-13 19:35:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:52,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:52,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070010205] [2021-07-13 19:35:52,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070010205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:52,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427901032] [2021-07-13 19:35:52,433 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 [2021-07-13 19:35:52,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:35:52,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:52,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:52,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:52,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427901032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:52,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:52,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:52,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462709208] [2021-07-13 19:35:52,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:52,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:52,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:52,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:52,642 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) [2021-07-13 19:35:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:53,027 INFO L93 Difference]: Finished difference Result 230 states and 480 transitions. [2021-07-13 19:35:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:35:53,027 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 [2021-07-13 19:35:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:53,027 INFO L225 Difference]: With dead ends: 230 [2021-07-13 19:35:53,027 INFO L226 Difference]: Without dead ends: 230 [2021-07-13 19:35:53,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 396.8ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:35:53,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-13 19:35:53,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 175. [2021-07-13 19:35:53,029 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) [2021-07-13 19:35:53,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 373 transitions. [2021-07-13 19:35:53,029 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 373 transitions. Word has length 19 [2021-07-13 19:35:53,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:53,029 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 373 transitions. [2021-07-13 19:35:53,029 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) [2021-07-13 19:35:53,030 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 373 transitions. [2021-07-13 19:35:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:53,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:53,030 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:53,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3533,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:53,230 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:53,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:53,230 INFO L82 PathProgramCache]: Analyzing trace with hash -123326396, now seen corresponding path program 484 times [2021-07-13 19:35:53,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:53,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935339531] [2021-07-13 19:35:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:53,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:53,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935339531] [2021-07-13 19:35:53,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935339531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:53,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636386723] [2021-07-13 19:35:53,329 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 [2021-07-13 19:35:53,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:53,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:53,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:53,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:53,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636386723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:53,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:53,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:35:53,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168406622] [2021-07-13 19:35:53,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:35:53,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:53,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:35:53,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:35:53,518 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) [2021-07-13 19:35:53,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:53,796 INFO L93 Difference]: Finished difference Result 213 states and 444 transitions. [2021-07-13 19:35:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:35:53,797 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 [2021-07-13 19:35:53,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:53,797 INFO L225 Difference]: With dead ends: 213 [2021-07-13 19:35:53,797 INFO L226 Difference]: Without dead ends: 213 [2021-07-13 19:35:53,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:35:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-13 19:35:53,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-07-13 19:35:53,799 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) [2021-07-13 19:35:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 353 transitions. [2021-07-13 19:35:53,799 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 353 transitions. Word has length 19 [2021-07-13 19:35:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:53,799 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 353 transitions. [2021-07-13 19:35:53,799 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) [2021-07-13 19:35:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 353 transitions. [2021-07-13 19:35:53,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:53,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:53,799 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:54,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3538,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:54,000 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:54,000 INFO L82 PathProgramCache]: Analyzing trace with hash 48244001, now seen corresponding path program 485 times [2021-07-13 19:35:54,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:54,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279024021] [2021-07-13 19:35:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:54,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:54,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279024021] [2021-07-13 19:35:54,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279024021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:54,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063028927] [2021-07-13 19:35:54,090 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 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 [2021-07-13 19:35:54,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:35:54,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:54,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:54,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:54,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063028927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:54,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:54,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:54,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454262452] [2021-07-13 19:35:54,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:54,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:54,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:54,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:54,381 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) [2021-07-13 19:35:54,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:54,849 INFO L93 Difference]: Finished difference Result 185 states and 381 transitions. [2021-07-13 19:35:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:35:54,850 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 [2021-07-13 19:35:54,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:54,850 INFO L225 Difference]: With dead ends: 185 [2021-07-13 19:35:54,850 INFO L226 Difference]: Without dead ends: 173 [2021-07-13 19:35:54,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 574.5ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:35:54,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-13 19:35:54,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2021-07-13 19:35:54,852 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) [2021-07-13 19:35:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 352 transitions. [2021-07-13 19:35:54,852 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 352 transitions. Word has length 19 [2021-07-13 19:35:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:54,852 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 352 transitions. [2021-07-13 19:35:54,852 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) [2021-07-13 19:35:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 352 transitions. [2021-07-13 19:35:54,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:54,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:54,852 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:55,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:55,053 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:55,053 INFO L82 PathProgramCache]: Analyzing trace with hash 335794236, now seen corresponding path program 486 times [2021-07-13 19:35:55,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:55,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655196176] [2021-07-13 19:35:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:55,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:55,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655196176] [2021-07-13 19:35:55,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655196176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:55,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86058579] [2021-07-13 19:35:55,144 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 [2021-07-13 19:35:55,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:35:55,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:55,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:55,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:55,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86058579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:55,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:55,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:55,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197449030] [2021-07-13 19:35:55,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:55,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:55,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:55,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:55,365 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) [2021-07-13 19:35:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:56,084 INFO L93 Difference]: Finished difference Result 231 states and 460 transitions. [2021-07-13 19:35:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:35:56,084 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 [2021-07-13 19:35:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:56,084 INFO L225 Difference]: With dead ends: 231 [2021-07-13 19:35:56,084 INFO L226 Difference]: Without dead ends: 231 [2021-07-13 19:35:56,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 677.6ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:35:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-13 19:35:56,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 173. [2021-07-13 19:35:56,086 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) [2021-07-13 19:35:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 368 transitions. [2021-07-13 19:35:56,086 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 368 transitions. Word has length 19 [2021-07-13 19:35:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:56,086 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 368 transitions. [2021-07-13 19:35:56,087 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) [2021-07-13 19:35:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 368 transitions. [2021-07-13 19:35:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:56,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:56,087 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:56,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-07-13 19:35:56,287 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:56,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:56,287 INFO L82 PathProgramCache]: Analyzing trace with hash 637784516, now seen corresponding path program 487 times [2021-07-13 19:35:56,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:56,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407928001] [2021-07-13 19:35:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:56,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:56,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407928001] [2021-07-13 19:35:56,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407928001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:56,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993882894] [2021-07-13 19:35:56,380 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 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 [2021-07-13 19:35:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:56,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:56,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:56,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993882894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:56,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:56,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:56,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775976950] [2021-07-13 19:35:56,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:56,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:56,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:56,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:56,599 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) [2021-07-13 19:35:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:56,950 INFO L93 Difference]: Finished difference Result 205 states and 428 transitions. [2021-07-13 19:35:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:35:56,950 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 [2021-07-13 19:35:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:56,950 INFO L225 Difference]: With dead ends: 205 [2021-07-13 19:35:56,950 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 19:35:56,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:35:56,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 19:35:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 172. [2021-07-13 19:35:56,952 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) [2021-07-13 19:35:56,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 366 transitions. [2021-07-13 19:35:56,952 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 366 transitions. Word has length 19 [2021-07-13 19:35:56,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:56,952 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 366 transitions. [2021-07-13 19:35:56,953 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) [2021-07-13 19:35:56,953 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 366 transitions. [2021-07-13 19:35:56,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:56,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:56,953 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:57,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3558 [2021-07-13 19:35:57,153 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:57,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:57,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1144130782, now seen corresponding path program 488 times [2021-07-13 19:35:57,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:57,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327160495] [2021-07-13 19:35:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:57,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:57,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327160495] [2021-07-13 19:35:57,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327160495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:57,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341633019] [2021-07-13 19:35:57,249 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 [2021-07-13 19:35:57,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:35:57,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:57,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:57,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:57,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341633019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:57,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:57,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:57,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944359811] [2021-07-13 19:35:57,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:57,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:57,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:57,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:57,460 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) [2021-07-13 19:35:57,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:57,796 INFO L93 Difference]: Finished difference Result 217 states and 453 transitions. [2021-07-13 19:35:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:35:57,797 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 [2021-07-13 19:35:57,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:57,797 INFO L225 Difference]: With dead ends: 217 [2021-07-13 19:35:57,797 INFO L226 Difference]: Without dead ends: 217 [2021-07-13 19:35:57,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 398.7ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:35:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-13 19:35:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 171. [2021-07-13 19:35:57,799 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) [2021-07-13 19:35:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 364 transitions. [2021-07-13 19:35:57,799 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 364 transitions. Word has length 19 [2021-07-13 19:35:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:57,799 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 364 transitions. [2021-07-13 19:35:57,799 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) [2021-07-13 19:35:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 364 transitions. [2021-07-13 19:35:57,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:57,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:57,799 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:58,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3563,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:58,000 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:58,000 INFO L82 PathProgramCache]: Analyzing trace with hash -339004156, now seen corresponding path program 489 times [2021-07-13 19:35:58,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:58,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773731213] [2021-07-13 19:35:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:58,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:58,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773731213] [2021-07-13 19:35:58,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773731213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:58,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827282102] [2021-07-13 19:35:58,088 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 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 [2021-07-13 19:35:58,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:35:58,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:58,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:58,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:58,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827282102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:58,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:58,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:58,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681758486] [2021-07-13 19:35:58,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:58,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:58,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:58,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:58,292 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) [2021-07-13 19:35:58,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:58,643 INFO L93 Difference]: Finished difference Result 200 states and 415 transitions. [2021-07-13 19:35:58,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:35:58,643 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 [2021-07-13 19:35:58,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:58,643 INFO L225 Difference]: With dead ends: 200 [2021-07-13 19:35:58,643 INFO L226 Difference]: Without dead ends: 200 [2021-07-13 19:35:58,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 384.9ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:35:58,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-13 19:35:58,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 164. [2021-07-13 19:35:58,645 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) [2021-07-13 19:35:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 344 transitions. [2021-07-13 19:35:58,645 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 344 transitions. Word has length 19 [2021-07-13 19:35:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:58,645 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 344 transitions. [2021-07-13 19:35:58,645 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) [2021-07-13 19:35:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 344 transitions. [2021-07-13 19:35:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:58,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:58,646 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:58,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3568 [2021-07-13 19:35:58,846 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:58,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:58,846 INFO L82 PathProgramCache]: Analyzing trace with hash 472555237, now seen corresponding path program 490 times [2021-07-13 19:35:58,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:58,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068451210] [2021-07-13 19:35:58,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:58,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:58,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068451210] [2021-07-13 19:35:58,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068451210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:58,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121049415] [2021-07-13 19:35:58,943 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 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 [2021-07-13 19:35:58,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:35:58,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:58,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:35:58,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:59,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121049415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:59,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:59,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:35:59,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312741081] [2021-07-13 19:35:59,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:35:59,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:59,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:35:59,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:35:59,232 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) [2021-07-13 19:35:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:59,727 INFO L93 Difference]: Finished difference Result 195 states and 398 transitions. [2021-07-13 19:35:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:35:59,728 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 [2021-07-13 19:35:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:59,728 INFO L225 Difference]: With dead ends: 195 [2021-07-13 19:35:59,728 INFO L226 Difference]: Without dead ends: 195 [2021-07-13 19:35:59,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 644.8ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:35:59,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-07-13 19:35:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 164. [2021-07-13 19:35:59,729 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) [2021-07-13 19:35:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 344 transitions. [2021-07-13 19:35:59,730 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 344 transitions. Word has length 19 [2021-07-13 19:35:59,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:59,730 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 344 transitions. [2021-07-13 19:35:59,730 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) [2021-07-13 19:35:59,730 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 344 transitions. [2021-07-13 19:35:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:35:59,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:59,730 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:59,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3573,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:59,931 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:59,931 INFO L82 PathProgramCache]: Analyzing trace with hash 760105472, now seen corresponding path program 491 times [2021-07-13 19:35:59,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:59,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108109775] [2021-07-13 19:35:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:00,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:00,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108109775] [2021-07-13 19:36:00,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108109775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:00,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354440458] [2021-07-13 19:36:00,022 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 [2021-07-13 19:36:00,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:36:00,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:00,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:36:00,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:00,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354440458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:00,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:00,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:36:00,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022473775] [2021-07-13 19:36:00,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:36:00,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:00,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:36:00,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:36:00,242 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) [2021-07-13 19:36:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:00,919 INFO L93 Difference]: Finished difference Result 228 states and 458 transitions. [2021-07-13 19:36:00,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:36:00,919 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 [2021-07-13 19:36:00,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:00,920 INFO L225 Difference]: With dead ends: 228 [2021-07-13 19:36:00,920 INFO L226 Difference]: Without dead ends: 228 [2021-07-13 19:36:00,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:36:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-13 19:36:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 168. [2021-07-13 19:36:00,921 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) [2021-07-13 19:36:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 354 transitions. [2021-07-13 19:36:00,922 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 354 transitions. Word has length 19 [2021-07-13 19:36:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:00,922 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 354 transitions. [2021-07-13 19:36:00,922 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) [2021-07-13 19:36:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 354 transitions. [2021-07-13 19:36:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:00,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:00,922 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:01,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3581 [2021-07-13 19:36:01,122 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:01,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1062095752, now seen corresponding path program 492 times [2021-07-13 19:36:01,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:01,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765026772] [2021-07-13 19:36:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:01,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:01,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765026772] [2021-07-13 19:36:01,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765026772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:01,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016171514] [2021-07-13 19:36:01,212 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 [2021-07-13 19:36:01,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:36:01,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:01,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:36:01,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:01,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016171514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:01,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:01,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:36:01,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505159321] [2021-07-13 19:36:01,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:36:01,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:01,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:36:01,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:36:01,431 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) [2021-07-13 19:36:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:02,016 INFO L93 Difference]: Finished difference Result 226 states and 459 transitions. [2021-07-13 19:36:02,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:36:02,017 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 [2021-07-13 19:36:02,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:02,017 INFO L225 Difference]: With dead ends: 226 [2021-07-13 19:36:02,017 INFO L226 Difference]: Without dead ends: 226 [2021-07-13 19:36:02,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 617.0ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:36:02,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-13 19:36:02,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 167. [2021-07-13 19:36:02,019 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) [2021-07-13 19:36:02,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 352 transitions. [2021-07-13 19:36:02,019 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 352 transitions. Word has length 19 [2021-07-13 19:36:02,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:02,019 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 352 transitions. [2021-07-13 19:36:02,019 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) [2021-07-13 19:36:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 352 transitions. [2021-07-13 19:36:02,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:02,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:02,019 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:02,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:02,220 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:02,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1568442018, now seen corresponding path program 493 times [2021-07-13 19:36:02,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:02,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418696416] [2021-07-13 19:36:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:02,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:02,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418696416] [2021-07-13 19:36:02,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418696416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:02,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134035304] [2021-07-13 19:36:02,310 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 [2021-07-13 19:36:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:02,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:36:02,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:02,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134035304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:02,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:02,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:36:02,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498507841] [2021-07-13 19:36:02,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:36:02,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:02,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:36:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:36:02,518 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) [2021-07-13 19:36:03,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:03,120 INFO L93 Difference]: Finished difference Result 238 states and 484 transitions. [2021-07-13 19:36:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:36:03,121 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 [2021-07-13 19:36:03,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:03,121 INFO L225 Difference]: With dead ends: 238 [2021-07-13 19:36:03,121 INFO L226 Difference]: Without dead ends: 238 [2021-07-13 19:36:03,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 621.8ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:36:03,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-13 19:36:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 166. [2021-07-13 19:36:03,123 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) [2021-07-13 19:36:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 350 transitions. [2021-07-13 19:36:03,123 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 350 transitions. Word has length 19 [2021-07-13 19:36:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:03,123 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 350 transitions. [2021-07-13 19:36:03,123 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) [2021-07-13 19:36:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 350 transitions. [2021-07-13 19:36:03,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:03,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:03,123 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:03,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3593 [2021-07-13 19:36:03,324 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:03,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:03,324 INFO L82 PathProgramCache]: Analyzing trace with hash 85307080, now seen corresponding path program 494 times [2021-07-13 19:36:03,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:03,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568378273] [2021-07-13 19:36:03,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:03,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:03,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568378273] [2021-07-13 19:36:03,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568378273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:03,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225565586] [2021-07-13 19:36:03,415 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 [2021-07-13 19:36:03,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:03,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:03,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:36:03,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:03,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225565586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:03,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:03,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:36:03,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381277529] [2021-07-13 19:36:03,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:36:03,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:03,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:36:03,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:36:03,615 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) [2021-07-13 19:36:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:04,223 INFO L93 Difference]: Finished difference Result 250 states and 509 transitions. [2021-07-13 19:36:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:36:04,223 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 [2021-07-13 19:36:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:04,223 INFO L225 Difference]: With dead ends: 250 [2021-07-13 19:36:04,223 INFO L226 Difference]: Without dead ends: 250 [2021-07-13 19:36:04,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 596.3ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:36:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-07-13 19:36:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 165. [2021-07-13 19:36:04,225 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) [2021-07-13 19:36:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 348 transitions. [2021-07-13 19:36:04,225 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 348 transitions. Word has length 19 [2021-07-13 19:36:04,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:04,225 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 348 transitions. [2021-07-13 19:36:04,225 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) [2021-07-13 19:36:04,225 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 348 transitions. [2021-07-13 19:36:04,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:36:04,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:04,226 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:04,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:04,426 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:04,426 INFO L82 PathProgramCache]: Analyzing trace with hash 930278532, now seen corresponding path program 495 times [2021-07-13 19:36:04,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:04,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337482842] [2021-07-13 19:36:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:04,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:04,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337482842] [2021-07-13 19:36:04,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337482842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:04,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100615154] [2021-07-13 19:36:04,504 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 [2021-07-13 19:36:04,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:36:04,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:04,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:36:04,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:04,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100615154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:04,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:04,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 19:36:04,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065484381] [2021-07-13 19:36:04,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:36:04,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:04,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:36:04,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:36:04,661 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) [2021-07-13 19:36:04,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:04,804 INFO L93 Difference]: Finished difference Result 219 states and 444 transitions. [2021-07-13 19:36:04,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:36:04,805 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 [2021-07-13 19:36:04,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:04,805 INFO L225 Difference]: With dead ends: 219 [2021-07-13 19:36:04,805 INFO L226 Difference]: Without dead ends: 219 [2021-07-13 19:36:04,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:36:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-13 19:36:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 159. [2021-07-13 19:36:04,807 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) [2021-07-13 19:36:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 332 transitions. [2021-07-13 19:36:04,807 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 332 transitions. Word has length 19 [2021-07-13 19:36:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:04,807 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 332 transitions. [2021-07-13 19:36:04,807 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) [2021-07-13 19:36:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 332 transitions. [2021-07-13 19:36:04,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:04,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:04,807 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:05,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3603,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:05,008 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:05,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:05,008 INFO L82 PathProgramCache]: Analyzing trace with hash 313289047, now seen corresponding path program 496 times [2021-07-13 19:36:05,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:05,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142538187] [2021-07-13 19:36:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:05,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:05,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142538187] [2021-07-13 19:36:05,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142538187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:05,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358863861] [2021-07-13 19:36:05,273 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 [2021-07-13 19:36:05,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:05,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:05,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:36:05,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:05,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358863861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:05,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:05,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:36:05,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181297484] [2021-07-13 19:36:05,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:36:05,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:05,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:36:05,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:36:05,715 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) [2021-07-13 19:36:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:06,222 INFO L93 Difference]: Finished difference Result 250 states and 493 transitions. [2021-07-13 19:36:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:36:06,222 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 [2021-07-13 19:36:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:06,222 INFO L225 Difference]: With dead ends: 250 [2021-07-13 19:36:06,222 INFO L226 Difference]: Without dead ends: 231 [2021-07-13 19:36:06,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 901.1ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:36:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-13 19:36:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2021-07-13 19:36:06,224 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) [2021-07-13 19:36:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 334 transitions. [2021-07-13 19:36:06,224 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 334 transitions. Word has length 20 [2021-07-13 19:36:06,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:06,224 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 334 transitions. [2021-07-13 19:36:06,224 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) [2021-07-13 19:36:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 334 transitions. [2021-07-13 19:36:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:06,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:06,225 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:06,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-07-13 19:36:06,425 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:06,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:06,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2044100551, now seen corresponding path program 497 times [2021-07-13 19:36:06,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:06,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144546145] [2021-07-13 19:36:06,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:06,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:06,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144546145] [2021-07-13 19:36:06,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144546145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:06,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919333860] [2021-07-13 19:36:06,627 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 [2021-07-13 19:36:06,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:36:06,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:06,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:36:06,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:07,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919333860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:07,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:07,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:36:07,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230465210] [2021-07-13 19:36:07,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:36:07,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:07,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:36:07,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:36:07,093 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) [2021-07-13 19:36:08,364 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-07-13 19:36:08,653 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 74 [2021-07-13 19:36:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:08,705 INFO L93 Difference]: Finished difference Result 282 states and 567 transitions. [2021-07-13 19:36:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:36:08,705 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 [2021-07-13 19:36:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:08,705 INFO L225 Difference]: With dead ends: 282 [2021-07-13 19:36:08,705 INFO L226 Difference]: Without dead ends: 258 [2021-07-13 19:36:08,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1760.6ms TimeCoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:36:08,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-13 19:36:08,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 164. [2021-07-13 19:36:08,707 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) [2021-07-13 19:36:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 345 transitions. [2021-07-13 19:36:08,708 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 345 transitions. Word has length 20 [2021-07-13 19:36:08,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:08,708 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 345 transitions. [2021-07-13 19:36:08,708 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) [2021-07-13 19:36:08,708 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 345 transitions. [2021-07-13 19:36:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:08,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:08,708 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:08,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3620,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:08,909 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:08,909 INFO L82 PathProgramCache]: Analyzing trace with hash -983322461, now seen corresponding path program 498 times [2021-07-13 19:36:08,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:08,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451989552] [2021-07-13 19:36:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:09,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:09,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451989552] [2021-07-13 19:36:09,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451989552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:09,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980231699] [2021-07-13 19:36:09,104 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 [2021-07-13 19:36:09,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:36:09,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:09,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:36:09,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:09,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980231699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:09,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:09,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:09,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212014029] [2021-07-13 19:36:09,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:09,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:09,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:09,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:09,598 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) [2021-07-13 19:36:10,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:10,449 INFO L93 Difference]: Finished difference Result 214 states and 421 transitions. [2021-07-13 19:36:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:36:10,449 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 [2021-07-13 19:36:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:10,450 INFO L225 Difference]: With dead ends: 214 [2021-07-13 19:36:10,450 INFO L226 Difference]: Without dead ends: 197 [2021-07-13 19:36:10,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1134.3ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:36:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-13 19:36:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 166. [2021-07-13 19:36:10,451 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) [2021-07-13 19:36:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 349 transitions. [2021-07-13 19:36:10,452 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 349 transitions. Word has length 20 [2021-07-13 19:36:10,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:10,452 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 349 transitions. [2021-07-13 19:36:10,452 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) [2021-07-13 19:36:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 349 transitions. [2021-07-13 19:36:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:10,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:10,452 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:10,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:10,652 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:10,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:10,653 INFO L82 PathProgramCache]: Analyzing trace with hash -685269503, now seen corresponding path program 499 times [2021-07-13 19:36:10,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:10,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528189649] [2021-07-13 19:36:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:10,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:10,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528189649] [2021-07-13 19:36:10,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528189649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:10,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475898173] [2021-07-13 19:36:10,840 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 [2021-07-13 19:36:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:10,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:36:10,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:11,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475898173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:11,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:11,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:11,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180447694] [2021-07-13 19:36:11,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:11,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:11,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:11,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:11,311 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) [2021-07-13 19:36:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:12,374 INFO L93 Difference]: Finished difference Result 231 states and 458 transitions. [2021-07-13 19:36:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:36:12,375 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 [2021-07-13 19:36:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:12,375 INFO L225 Difference]: With dead ends: 231 [2021-07-13 19:36:12,375 INFO L226 Difference]: Without dead ends: 224 [2021-07-13 19:36:12,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1140.1ms TimeCoverageRelationStatistics Valid=149, Invalid=1573, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:36:12,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-13 19:36:12,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 167. [2021-07-13 19:36:12,377 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) [2021-07-13 19:36:12,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 352 transitions. [2021-07-13 19:36:12,377 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 352 transitions. Word has length 20 [2021-07-13 19:36:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:12,377 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 352 transitions. [2021-07-13 19:36:12,377 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) [2021-07-13 19:36:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 352 transitions. [2021-07-13 19:36:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:12,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:12,377 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:12,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3644 [2021-07-13 19:36:12,578 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:12,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1956744419, now seen corresponding path program 500 times [2021-07-13 19:36:12,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:12,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214604374] [2021-07-13 19:36:12,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:12,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:12,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214604374] [2021-07-13 19:36:12,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214604374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:12,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143111056] [2021-07-13 19:36:12,807 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 [2021-07-13 19:36:12,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:12,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:12,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:36:12,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:13,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143111056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:13,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:13,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:13,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152311284] [2021-07-13 19:36:13,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:13,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:13,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:13,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:13,430 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) [2021-07-13 19:36:14,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:14,313 INFO L93 Difference]: Finished difference Result 221 states and 433 transitions. [2021-07-13 19:36:14,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:36:14,313 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 [2021-07-13 19:36:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:14,314 INFO L225 Difference]: With dead ends: 221 [2021-07-13 19:36:14,314 INFO L226 Difference]: Without dead ends: 200 [2021-07-13 19:36:14,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1260.9ms TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:36:14,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-07-13 19:36:14,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 168. [2021-07-13 19:36:14,315 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) [2021-07-13 19:36:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 353 transitions. [2021-07-13 19:36:14,316 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 353 transitions. Word has length 20 [2021-07-13 19:36:14,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:14,316 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 353 transitions. [2021-07-13 19:36:14,316 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) [2021-07-13 19:36:14,316 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 353 transitions. [2021-07-13 19:36:14,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:14,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:14,316 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:14,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3659,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:14,516 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:14,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:14,517 INFO L82 PathProgramCache]: Analyzing trace with hash 379402689, now seen corresponding path program 501 times [2021-07-13 19:36:14,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:14,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833800322] [2021-07-13 19:36:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:14,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:14,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833800322] [2021-07-13 19:36:14,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833800322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:14,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762385792] [2021-07-13 19:36:14,751 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 [2021-07-13 19:36:14,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:36:14,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:14,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 19:36:14,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:15,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762385792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:15,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:15,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:15,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20248125] [2021-07-13 19:36:15,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:15,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:15,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:15,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:15,270 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) [2021-07-13 19:36:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:16,487 INFO L93 Difference]: Finished difference Result 250 states and 485 transitions. [2021-07-13 19:36:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:36:16,488 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 [2021-07-13 19:36:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:16,488 INFO L225 Difference]: With dead ends: 250 [2021-07-13 19:36:16,488 INFO L226 Difference]: Without dead ends: 232 [2021-07-13 19:36:16,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1453.7ms TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:36:16,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-13 19:36:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 172. [2021-07-13 19:36:16,490 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) [2021-07-13 19:36:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 364 transitions. [2021-07-13 19:36:16,490 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 364 transitions. Word has length 20 [2021-07-13 19:36:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:16,490 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 364 transitions. [2021-07-13 19:36:16,490 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) [2021-07-13 19:36:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 364 transitions. [2021-07-13 19:36:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:16,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:16,491 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:16,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-07-13 19:36:16,691 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:16,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:16,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1713994019, now seen corresponding path program 502 times [2021-07-13 19:36:16,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:16,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222500508] [2021-07-13 19:36:16,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:16,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:16,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222500508] [2021-07-13 19:36:16,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222500508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:16,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951379474] [2021-07-13 19:36:16,882 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 [2021-07-13 19:36:16,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:16,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:16,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:36:16,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:17,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951379474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:17,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:17,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:17,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385735763] [2021-07-13 19:36:17,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:17,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:17,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:17,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:17,405 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) [2021-07-13 19:36:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:18,719 INFO L93 Difference]: Finished difference Result 250 states and 481 transitions. [2021-07-13 19:36:18,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:36:18,719 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 [2021-07-13 19:36:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:18,719 INFO L225 Difference]: With dead ends: 250 [2021-07-13 19:36:18,719 INFO L226 Difference]: Without dead ends: 227 [2021-07-13 19:36:18,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1514.5ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:36:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-07-13 19:36:18,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 171. [2021-07-13 19:36:18,721 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) [2021-07-13 19:36:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 360 transitions. [2021-07-13 19:36:18,721 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 360 transitions. Word has length 20 [2021-07-13 19:36:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:18,721 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 360 transitions. [2021-07-13 19:36:18,721 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) [2021-07-13 19:36:18,721 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 360 transitions. [2021-07-13 19:36:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:18,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:18,722 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:18,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3684,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:18,922 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:18,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:18,922 INFO L82 PathProgramCache]: Analyzing trace with hash 582187675, now seen corresponding path program 503 times [2021-07-13 19:36:18,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:18,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022742914] [2021-07-13 19:36:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:19,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:19,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022742914] [2021-07-13 19:36:19,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022742914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:19,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077758746] [2021-07-13 19:36:19,165 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 [2021-07-13 19:36:19,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:36:19,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:19,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:36:19,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:19,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077758746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:19,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:19,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:19,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286826391] [2021-07-13 19:36:19,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:19,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:19,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:19,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:19,654 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) [2021-07-13 19:36:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:20,470 INFO L93 Difference]: Finished difference Result 220 states and 435 transitions. [2021-07-13 19:36:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:36:20,471 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 [2021-07-13 19:36:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:20,471 INFO L225 Difference]: With dead ends: 220 [2021-07-13 19:36:20,471 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 19:36:20,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1108.9ms TimeCoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:36:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 19:36:20,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 175. [2021-07-13 19:36:20,473 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) [2021-07-13 19:36:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 368 transitions. [2021-07-13 19:36:20,473 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 368 transitions. Word has length 20 [2021-07-13 19:36:20,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:20,473 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 368 transitions. [2021-07-13 19:36:20,473 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) [2021-07-13 19:36:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 368 transitions. [2021-07-13 19:36:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:20,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:20,474 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:20,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3696,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:20,674 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:20,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:20,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1070765699, now seen corresponding path program 504 times [2021-07-13 19:36:20,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:20,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165436666] [2021-07-13 19:36:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:20,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:20,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165436666] [2021-07-13 19:36:20,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165436666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:20,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849534085] [2021-07-13 19:36:20,926 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 [2021-07-13 19:36:20,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:36:20,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:20,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:36:20,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:21,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849534085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:21,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:21,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:21,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129901078] [2021-07-13 19:36:21,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:21,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:21,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:21,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:21,442 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) [2021-07-13 19:36:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:22,347 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2021-07-13 19:36:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:36:22,347 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 [2021-07-13 19:36:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:22,347 INFO L225 Difference]: With dead ends: 220 [2021-07-13 19:36:22,347 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 19:36:22,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1166.8ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:36:22,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 19:36:22,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 176. [2021-07-13 19:36:22,349 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) [2021-07-13 19:36:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 370 transitions. [2021-07-13 19:36:22,349 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 370 transitions. Word has length 20 [2021-07-13 19:36:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:22,349 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 370 transitions. [2021-07-13 19:36:22,349 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) [2021-07-13 19:36:22,349 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 370 transitions. [2021-07-13 19:36:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:22,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:22,350 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:22,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-07-13 19:36:22,550 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:22,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:22,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1646859867, now seen corresponding path program 505 times [2021-07-13 19:36:22,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:22,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427321869] [2021-07-13 19:36:22,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:22,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:22,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427321869] [2021-07-13 19:36:22,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427321869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:22,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270577103] [2021-07-13 19:36:22,832 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 [2021-07-13 19:36:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:22,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:36:22,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:23,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270577103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:23,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:23,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:23,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661404272] [2021-07-13 19:36:23,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:23,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:23,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:23,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:23,358 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) [2021-07-13 19:36:24,381 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-07-13 19:36:24,579 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2021-07-13 19:36:24,753 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2021-07-13 19:36:25,012 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-07-13 19:36:25,292 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-07-13 19:36:25,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:25,507 INFO L93 Difference]: Finished difference Result 280 states and 546 transitions. [2021-07-13 19:36:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:36:25,507 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 [2021-07-13 19:36:25,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:25,507 INFO L225 Difference]: With dead ends: 280 [2021-07-13 19:36:25,507 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:36:25,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2368.7ms TimeCoverageRelationStatistics Valid=261, Invalid=2189, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:36:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:36:25,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 182. [2021-07-13 19:36:25,516 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) [2021-07-13 19:36:25,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 389 transitions. [2021-07-13 19:36:25,517 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 389 transitions. Word has length 20 [2021-07-13 19:36:25,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:25,517 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 389 transitions. [2021-07-13 19:36:25,517 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) [2021-07-13 19:36:25,517 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 389 transitions. [2021-07-13 19:36:25,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:25,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:25,517 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:25,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3720,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:25,717 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:25,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:25,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1313516099, now seen corresponding path program 506 times [2021-07-13 19:36:25,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:25,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032079248] [2021-07-13 19:36:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:25,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:25,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032079248] [2021-07-13 19:36:25,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032079248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:25,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464021493] [2021-07-13 19:36:25,956 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 [2021-07-13 19:36:25,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:25,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:25,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:36:25,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:26,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464021493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:26,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:26,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:26,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608686643] [2021-07-13 19:36:26,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:26,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:26,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:26,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:26,482 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) [2021-07-13 19:36:27,561 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-07-13 19:36:27,734 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-07-13 19:36:27,935 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-07-13 19:36:28,062 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-07-13 19:36:28,238 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-07-13 19:36:28,423 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-07-13 19:36:28,556 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-07-13 19:36:28,699 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-07-13 19:36:29,197 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2021-07-13 19:36:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:29,305 INFO L93 Difference]: Finished difference Result 307 states and 587 transitions. [2021-07-13 19:36:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:36:29,305 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 [2021-07-13 19:36:29,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:29,306 INFO L225 Difference]: With dead ends: 307 [2021-07-13 19:36:29,306 INFO L226 Difference]: Without dead ends: 288 [2021-07-13 19:36:29,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 3008.2ms TimeCoverageRelationStatistics Valid=342, Invalid=2628, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:36:29,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-07-13 19:36:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 182. [2021-07-13 19:36:29,308 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) [2021-07-13 19:36:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 390 transitions. [2021-07-13 19:36:29,308 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 390 transitions. Word has length 20 [2021-07-13 19:36:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:29,308 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 390 transitions. [2021-07-13 19:36:29,308 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) [2021-07-13 19:36:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 390 transitions. [2021-07-13 19:36:29,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:29,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:29,309 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:29,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3732,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:29,509 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:29,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:29,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1741066659, now seen corresponding path program 507 times [2021-07-13 19:36:29,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:29,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906395771] [2021-07-13 19:36:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:29,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:29,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906395771] [2021-07-13 19:36:29,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906395771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:29,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614202969] [2021-07-13 19:36:29,741 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 [2021-07-13 19:36:29,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:36:29,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:29,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:36:29,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:30,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614202969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:30,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:30,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:30,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872772256] [2021-07-13 19:36:30,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:30,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:30,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:30,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:30,235 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) [2021-07-13 19:36:31,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:31,212 INFO L93 Difference]: Finished difference Result 229 states and 462 transitions. [2021-07-13 19:36:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:36:31,212 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 [2021-07-13 19:36:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:31,213 INFO L225 Difference]: With dead ends: 229 [2021-07-13 19:36:31,213 INFO L226 Difference]: Without dead ends: 216 [2021-07-13 19:36:31,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1242.3ms TimeCoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:36:31,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-13 19:36:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 184. [2021-07-13 19:36:31,214 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) [2021-07-13 19:36:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 394 transitions. [2021-07-13 19:36:31,214 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 394 transitions. Word has length 20 [2021-07-13 19:36:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:31,215 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 394 transitions. [2021-07-13 19:36:31,215 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) [2021-07-13 19:36:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 394 transitions. [2021-07-13 19:36:31,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:31,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:31,215 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:31,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3745,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:31,415 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:31,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:31,416 INFO L82 PathProgramCache]: Analyzing trace with hash 163724929, now seen corresponding path program 508 times [2021-07-13 19:36:31,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:31,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7640014] [2021-07-13 19:36:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:31,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:31,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7640014] [2021-07-13 19:36:31,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7640014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:31,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897197294] [2021-07-13 19:36:31,674 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 [2021-07-13 19:36:31,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:31,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:31,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:36:31,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:32,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897197294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:32,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:32,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:32,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294920138] [2021-07-13 19:36:32,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:32,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:32,130 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) [2021-07-13 19:36:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:33,827 INFO L93 Difference]: Finished difference Result 256 states and 512 transitions. [2021-07-13 19:36:33,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:36:33,827 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 [2021-07-13 19:36:33,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:33,828 INFO L225 Difference]: With dead ends: 256 [2021-07-13 19:36:33,828 INFO L226 Difference]: Without dead ends: 242 [2021-07-13 19:36:33,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1857.4ms TimeCoverageRelationStatistics Valid=224, Invalid=2326, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:36:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-13 19:36:33,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2021-07-13 19:36:33,830 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) [2021-07-13 19:36:33,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 401 transitions. [2021-07-13 19:36:33,830 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 401 transitions. Word has length 20 [2021-07-13 19:36:33,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:33,830 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 401 transitions. [2021-07-13 19:36:33,830 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) [2021-07-13 19:36:33,830 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 401 transitions. [2021-07-13 19:36:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:33,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:33,830 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:34,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3757 [2021-07-13 19:36:34,031 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:34,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:34,031 INFO L82 PathProgramCache]: Analyzing trace with hash 670071195, now seen corresponding path program 509 times [2021-07-13 19:36:34,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:34,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824881375] [2021-07-13 19:36:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:34,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:34,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824881375] [2021-07-13 19:36:34,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824881375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:34,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275925744] [2021-07-13 19:36:34,294 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 [2021-07-13 19:36:34,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:36:34,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:34,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:36:34,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:34,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275925744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:34,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:34,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:34,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202340773] [2021-07-13 19:36:34,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:34,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:34,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:34,777 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) [2021-07-13 19:36:36,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:36,158 INFO L93 Difference]: Finished difference Result 258 states and 517 transitions. [2021-07-13 19:36:36,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:36:36,159 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 [2021-07-13 19:36:36,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:36,159 INFO L225 Difference]: With dead ends: 258 [2021-07-13 19:36:36,159 INFO L226 Difference]: Without dead ends: 240 [2021-07-13 19:36:36,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1569.4ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:36:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-13 19:36:36,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 188. [2021-07-13 19:36:36,161 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) [2021-07-13 19:36:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 405 transitions. [2021-07-13 19:36:36,161 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 405 transitions. Word has length 20 [2021-07-13 19:36:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:36,161 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 405 transitions. [2021-07-13 19:36:36,161 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) [2021-07-13 19:36:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 405 transitions. [2021-07-13 19:36:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:36,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:36,162 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:36,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:36,362 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:36,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1466806947, now seen corresponding path program 510 times [2021-07-13 19:36:36,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:36,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30732487] [2021-07-13 19:36:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:36,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:36,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30732487] [2021-07-13 19:36:36,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30732487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:36,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127019305] [2021-07-13 19:36:36,553 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 [2021-07-13 19:36:36,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:36:36,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:36,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:36:36,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:36,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127019305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:36,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:36,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:36,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591281136] [2021-07-13 19:36:36,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:36,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:36,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:36,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:36,988 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) [2021-07-13 19:36:39,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:39,333 INFO L93 Difference]: Finished difference Result 312 states and 610 transitions. [2021-07-13 19:36:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:36:39,333 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 [2021-07-13 19:36:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:39,334 INFO L225 Difference]: With dead ends: 312 [2021-07-13 19:36:39,334 INFO L226 Difference]: Without dead ends: 280 [2021-07-13 19:36:39,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2434.5ms TimeCoverageRelationStatistics Valid=437, Invalid=3985, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 19:36:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-13 19:36:39,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 198. [2021-07-13 19:36:39,336 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) [2021-07-13 19:36:39,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 426 transitions. [2021-07-13 19:36:39,336 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 426 transitions. Word has length 20 [2021-07-13 19:36:39,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:39,336 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 426 transitions. [2021-07-13 19:36:39,336 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) [2021-07-13 19:36:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 426 transitions. [2021-07-13 19:36:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:39,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:39,336 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:39,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:39,537 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1836027257, now seen corresponding path program 511 times [2021-07-13 19:36:39,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:39,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398819954] [2021-07-13 19:36:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:39,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:39,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398819954] [2021-07-13 19:36:39,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398819954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:39,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765757994] [2021-07-13 19:36:39,775 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 [2021-07-13 19:36:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:39,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:36:39,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:40,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765757994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:40,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:40,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:40,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243611610] [2021-07-13 19:36:40,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:40,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:40,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:40,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:40,255 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) [2021-07-13 19:36:40,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:40,994 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-07-13 19:36:40,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:36:40,994 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 [2021-07-13 19:36:40,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:40,994 INFO L225 Difference]: With dead ends: 222 [2021-07-13 19:36:40,994 INFO L226 Difference]: Without dead ends: 205 [2021-07-13 19:36:40,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1085.9ms TimeCoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:36:40,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-13 19:36:40,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 199. [2021-07-13 19:36:40,996 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) [2021-07-13 19:36:40,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 428 transitions. [2021-07-13 19:36:40,996 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 428 transitions. Word has length 20 [2021-07-13 19:36:40,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:40,996 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 428 transitions. [2021-07-13 19:36:40,996 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) [2021-07-13 19:36:40,997 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 428 transitions. [2021-07-13 19:36:40,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:40,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:40,997 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:41,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3798 [2021-07-13 19:36:41,197 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:41,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:41,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2134080215, now seen corresponding path program 512 times [2021-07-13 19:36:41,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:41,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063544533] [2021-07-13 19:36:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:41,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:41,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063544533] [2021-07-13 19:36:41,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063544533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:41,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589264527] [2021-07-13 19:36:41,474 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 [2021-07-13 19:36:41,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:41,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:41,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:36:41,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:41,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589264527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:41,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:41,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:41,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091244586] [2021-07-13 19:36:41,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:41,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:41,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:41,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:41,994 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) [2021-07-13 19:36:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:42,734 INFO L93 Difference]: Finished difference Result 221 states and 461 transitions. [2021-07-13 19:36:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:36:42,734 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 [2021-07-13 19:36:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:42,734 INFO L225 Difference]: With dead ends: 221 [2021-07-13 19:36:42,734 INFO L226 Difference]: Without dead ends: 206 [2021-07-13 19:36:42,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1180.5ms TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:36:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-07-13 19:36:42,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2021-07-13 19:36:42,736 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) [2021-07-13 19:36:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 430 transitions. [2021-07-13 19:36:42,736 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 430 transitions. Word has length 20 [2021-07-13 19:36:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:42,736 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 430 transitions. [2021-07-13 19:36:42,736 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) [2021-07-13 19:36:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 430 transitions. [2021-07-13 19:36:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:42,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:42,737 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:42,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3810,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:42,937 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash 481126841, now seen corresponding path program 513 times [2021-07-13 19:36:42,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:42,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722321879] [2021-07-13 19:36:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:43,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:43,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722321879] [2021-07-13 19:36:43,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722321879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:43,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177521593] [2021-07-13 19:36:43,217 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 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 [2021-07-13 19:36:43,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:36:43,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:43,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:36:43,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:43,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177521593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:43,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:43,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:43,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44612962] [2021-07-13 19:36:43,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:43,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:43,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:43,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:43,749 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) [2021-07-13 19:36:44,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:44,489 INFO L93 Difference]: Finished difference Result 221 states and 462 transitions. [2021-07-13 19:36:44,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:36:44,489 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 [2021-07-13 19:36:44,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:44,489 INFO L225 Difference]: With dead ends: 221 [2021-07-13 19:36:44,489 INFO L226 Difference]: Without dead ends: 208 [2021-07-13 19:36:44,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1141.9ms TimeCoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:36:44,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-13 19:36:44,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 201. [2021-07-13 19:36:44,491 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) [2021-07-13 19:36:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 432 transitions. [2021-07-13 19:36:44,492 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 432 transitions. Word has length 20 [2021-07-13 19:36:44,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:44,492 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 432 transitions. [2021-07-13 19:36:44,492 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) [2021-07-13 19:36:44,492 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 432 transitions. [2021-07-13 19:36:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:44,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:44,492 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:44,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3822,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:44,692 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:44,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1096214889, now seen corresponding path program 514 times [2021-07-13 19:36:44,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:44,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101877174] [2021-07-13 19:36:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:44,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:44,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101877174] [2021-07-13 19:36:44,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101877174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:44,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757000629] [2021-07-13 19:36:44,985 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 [2021-07-13 19:36:45,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:45,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:45,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:36:45,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:45,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757000629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:45,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:45,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:36:45,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191055934] [2021-07-13 19:36:45,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:36:45,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:45,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:36:45,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:36:45,535 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) [2021-07-13 19:36:46,289 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-07-13 19:36:46,612 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-07-13 19:36:46,832 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-07-13 19:36:47,160 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2021-07-13 19:36:47,447 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-07-13 19:36:47,586 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-07-13 19:36:47,853 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2021-07-13 19:36:48,128 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-07-13 19:36:48,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:48,171 INFO L93 Difference]: Finished difference Result 280 states and 569 transitions. [2021-07-13 19:36:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:36:48,171 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 [2021-07-13 19:36:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:48,172 INFO L225 Difference]: With dead ends: 280 [2021-07-13 19:36:48,172 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:36:48,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2947.9ms TimeCoverageRelationStatistics Valid=260, Invalid=1996, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:36:48,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:36:48,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 207. [2021-07-13 19:36:48,174 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) [2021-07-13 19:36:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 451 transitions. [2021-07-13 19:36:48,174 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 451 transitions. Word has length 20 [2021-07-13 19:36:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:48,174 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 451 transitions. [2021-07-13 19:36:48,174 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) [2021-07-13 19:36:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 451 transitions. [2021-07-13 19:36:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:48,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:48,174 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:48,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3834,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:48,375 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:48,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:48,375 INFO L82 PathProgramCache]: Analyzing trace with hash -256963049, now seen corresponding path program 515 times [2021-07-13 19:36:48,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:48,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971318559] [2021-07-13 19:36:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:48,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:48,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971318559] [2021-07-13 19:36:48,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971318559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:48,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261041466] [2021-07-13 19:36:48,620 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 [2021-07-13 19:36:48,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:36:48,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:48,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:36:48,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:49,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261041466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:49,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:49,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:36:49,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238937620] [2021-07-13 19:36:49,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:36:49,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:49,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:36:49,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:36:49,091 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) [2021-07-13 19:36:49,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:49,475 INFO L93 Difference]: Finished difference Result 231 states and 488 transitions. [2021-07-13 19:36:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:36:49,476 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 [2021-07-13 19:36:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:49,476 INFO L225 Difference]: With dead ends: 231 [2021-07-13 19:36:49,476 INFO L226 Difference]: Without dead ends: 216 [2021-07-13 19:36:49,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 782.0ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:36:49,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-13 19:36:49,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 210. [2021-07-13 19:36:49,481 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) [2021-07-13 19:36:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 457 transitions. [2021-07-13 19:36:49,481 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 457 transitions. Word has length 20 [2021-07-13 19:36:49,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:49,481 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 457 transitions. [2021-07-13 19:36:49,481 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) [2021-07-13 19:36:49,481 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 457 transitions. [2021-07-13 19:36:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:49,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:49,482 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:49,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3846,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:49,682 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:49,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:49,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1909916423, now seen corresponding path program 516 times [2021-07-13 19:36:49,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:49,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306064930] [2021-07-13 19:36:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:49,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:49,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306064930] [2021-07-13 19:36:49,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306064930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:49,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137115913] [2021-07-13 19:36:49,932 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 [2021-07-13 19:36:49,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:36:49,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:49,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:36:49,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:50,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137115913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:50,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:50,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:36:50,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468243930] [2021-07-13 19:36:50,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:36:50,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:50,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:36:50,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:36:50,417 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) [2021-07-13 19:36:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:50,859 INFO L93 Difference]: Finished difference Result 231 states and 489 transitions. [2021-07-13 19:36:50,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:36:50,859 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 [2021-07-13 19:36:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:50,859 INFO L225 Difference]: With dead ends: 231 [2021-07-13 19:36:50,859 INFO L226 Difference]: Without dead ends: 218 [2021-07-13 19:36:50,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 824.6ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:36:50,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-07-13 19:36:50,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 211. [2021-07-13 19:36:50,861 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) [2021-07-13 19:36:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 459 transitions. [2021-07-13 19:36:50,862 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 459 transitions. Word has length 20 [2021-07-13 19:36:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:50,862 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 459 transitions. [2021-07-13 19:36:50,862 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) [2021-07-13 19:36:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 459 transitions. [2021-07-13 19:36:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:50,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:50,862 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:51,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3858 [2021-07-13 19:36:51,062 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:51,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:51,063 INFO L82 PathProgramCache]: Analyzing trace with hash 807709143, now seen corresponding path program 517 times [2021-07-13 19:36:51,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:51,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002337579] [2021-07-13 19:36:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:51,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:51,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002337579] [2021-07-13 19:36:51,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002337579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:51,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601610339] [2021-07-13 19:36:51,284 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 [2021-07-13 19:36:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:36:51,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:51,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601610339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:51,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:51,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:36:51,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900961696] [2021-07-13 19:36:51,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:36:51,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:51,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:36:51,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:36:51,783 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) [2021-07-13 19:36:52,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:52,333 INFO L93 Difference]: Finished difference Result 243 states and 510 transitions. [2021-07-13 19:36:52,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:36:52,334 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 [2021-07-13 19:36:52,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:52,334 INFO L225 Difference]: With dead ends: 243 [2021-07-13 19:36:52,334 INFO L226 Difference]: Without dead ends: 232 [2021-07-13 19:36:52,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 858.5ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:36:52,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-13 19:36:52,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 212. [2021-07-13 19:36:52,336 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) [2021-07-13 19:36:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 461 transitions. [2021-07-13 19:36:52,336 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 461 transitions. Word has length 20 [2021-07-13 19:36:52,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:52,336 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 461 transitions. [2021-07-13 19:36:52,336 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) [2021-07-13 19:36:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 461 transitions. [2021-07-13 19:36:52,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:52,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:52,337 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:52,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 518 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3870 [2021-07-13 19:36:52,537 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:52,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:52,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2142300473, now seen corresponding path program 518 times [2021-07-13 19:36:52,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:52,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472663301] [2021-07-13 19:36:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:52,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:52,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472663301] [2021-07-13 19:36:52,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472663301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:52,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402360265] [2021-07-13 19:36:52,747 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 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 [2021-07-13 19:36:52,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:36:52,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:52,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:36:52,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:53,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402360265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:53,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:53,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:36:53,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749751460] [2021-07-13 19:36:53,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:36:53,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:53,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:36:53,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:36:53,245 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) [2021-07-13 19:36:53,732 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-07-13 19:36:53,925 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-07-13 19:36:54,203 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-07-13 19:36:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:54,897 INFO L93 Difference]: Finished difference Result 341 states and 671 transitions. [2021-07-13 19:36:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:36:54,897 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 [2021-07-13 19:36:54,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:54,898 INFO L225 Difference]: With dead ends: 341 [2021-07-13 19:36:54,898 INFO L226 Difference]: Without dead ends: 308 [2021-07-13 19:36:54,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1871.4ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:36:54,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-07-13 19:36:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 215. [2021-07-13 19:36:54,900 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) [2021-07-13 19:36:54,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 471 transitions. [2021-07-13 19:36:54,900 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 471 transitions. Word has length 20 [2021-07-13 19:36:54,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:54,900 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 471 transitions. [2021-07-13 19:36:54,901 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) [2021-07-13 19:36:54,901 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 471 transitions. [2021-07-13 19:36:54,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:54,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:54,901 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:55,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3882,519 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:55,101 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:55,101 INFO L82 PathProgramCache]: Analyzing trace with hash 901915935, now seen corresponding path program 519 times [2021-07-13 19:36:55,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:55,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821142073] [2021-07-13 19:36:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:55,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:55,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821142073] [2021-07-13 19:36:55,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821142073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:55,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566945039] [2021-07-13 19:36:55,310 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 [2021-07-13 19:36:55,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:36:55,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:55,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:36:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:55,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566945039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:55,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:55,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:36:55,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585737215] [2021-07-13 19:36:55,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:36:55,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:55,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:36:55,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:36:55,793 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) [2021-07-13 19:36:56,288 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-07-13 19:36:56,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:56,518 INFO L93 Difference]: Finished difference Result 248 states and 523 transitions. [2021-07-13 19:36:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:36:56,519 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 [2021-07-13 19:36:56,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:56,519 INFO L225 Difference]: With dead ends: 248 [2021-07-13 19:36:56,519 INFO L226 Difference]: Without dead ends: 241 [2021-07-13 19:36:56,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1018.2ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:36:56,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-13 19:36:56,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 217. [2021-07-13 19:36:56,521 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) [2021-07-13 19:36:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 476 transitions. [2021-07-13 19:36:56,521 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 476 transitions. Word has length 20 [2021-07-13 19:36:56,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:56,521 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 476 transitions. [2021-07-13 19:36:56,521 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) [2021-07-13 19:36:56,521 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 476 transitions. [2021-07-13 19:36:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:56,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:56,522 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:56,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3895,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:56,722 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:56,722 INFO L82 PathProgramCache]: Analyzing trace with hash -675425795, now seen corresponding path program 520 times [2021-07-13 19:36:56,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:56,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524043663] [2021-07-13 19:36:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:56,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:56,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524043663] [2021-07-13 19:36:56,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524043663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:56,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245618157] [2021-07-13 19:36:56,939 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 [2021-07-13 19:36:56,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:36:56,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:56,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:36:56,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:57,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245618157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:57,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:57,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:36:57,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065267826] [2021-07-13 19:36:57,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:36:57,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:57,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:36:57,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:36:57,408 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) [2021-07-13 19:36:58,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:36:58,082 INFO L93 Difference]: Finished difference Result 254 states and 532 transitions. [2021-07-13 19:36:58,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:36:58,083 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 [2021-07-13 19:36:58,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:36:58,083 INFO L225 Difference]: With dead ends: 254 [2021-07-13 19:36:58,083 INFO L226 Difference]: Without dead ends: 237 [2021-07-13 19:36:58,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 938.2ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:36:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-13 19:36:58,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 218. [2021-07-13 19:36:58,085 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) [2021-07-13 19:36:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 477 transitions. [2021-07-13 19:36:58,085 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 477 transitions. Word has length 20 [2021-07-13 19:36:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:36:58,085 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 477 transitions. [2021-07-13 19:36:58,085 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) [2021-07-13 19:36:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 477 transitions. [2021-07-13 19:36:58,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:36:58,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:36:58,086 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:36:58,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3909,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:36:58,286 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:36:58,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:36:58,287 INFO L82 PathProgramCache]: Analyzing trace with hash 659165535, now seen corresponding path program 521 times [2021-07-13 19:36:58,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:36:58,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734858302] [2021-07-13 19:36:58,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:36:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:36:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:58,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:36:58,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734858302] [2021-07-13 19:36:58,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734858302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:58,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022395579] [2021-07-13 19:36:58,464 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 [2021-07-13 19:36:58,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:36:58,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:36:58,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:36:58,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:36:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:36:58,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022395579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:36:58,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:36:58,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:36:58,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134424548] [2021-07-13 19:36:58,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:36:58,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:36:58,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:36:58,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:36:58,910 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) [2021-07-13 19:37:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:00,327 INFO L93 Difference]: Finished difference Result 308 states and 630 transitions. [2021-07-13 19:37:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:37:00,327 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 [2021-07-13 19:37:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:00,328 INFO L225 Difference]: With dead ends: 308 [2021-07-13 19:37:00,328 INFO L226 Difference]: Without dead ends: 276 [2021-07-13 19:37:00,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1566.3ms TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:37:00,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-07-13 19:37:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 220. [2021-07-13 19:37:00,330 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) [2021-07-13 19:37:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 485 transitions. [2021-07-13 19:37:00,330 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 485 transitions. Word has length 20 [2021-07-13 19:37:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:00,330 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 485 transitions. [2021-07-13 19:37:00,330 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) [2021-07-13 19:37:00,330 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 485 transitions. [2021-07-13 19:37:00,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:00,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:00,330 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:00,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3921,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:00,531 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:00,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:00,531 INFO L82 PathProgramCache]: Analyzing trace with hash -169079529, now seen corresponding path program 522 times [2021-07-13 19:37:00,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:00,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022203762] [2021-07-13 19:37:00,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:00,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:00,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022203762] [2021-07-13 19:37:00,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022203762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:00,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979597124] [2021-07-13 19:37:00,707 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 [2021-07-13 19:37:00,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:37:00,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:00,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:00,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:01,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979597124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:01,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:01,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:01,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291371283] [2021-07-13 19:37:01,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:01,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:01,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:01,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:01,139 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) [2021-07-13 19:37:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:01,947 INFO L93 Difference]: Finished difference Result 273 states and 580 transitions. [2021-07-13 19:37:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:37:01,947 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 [2021-07-13 19:37:01,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:01,948 INFO L225 Difference]: With dead ends: 273 [2021-07-13 19:37:01,948 INFO L226 Difference]: Without dead ends: 255 [2021-07-13 19:37:01,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1011.6ms TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:37:01,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-13 19:37:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 220. [2021-07-13 19:37:01,950 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) [2021-07-13 19:37:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 485 transitions. [2021-07-13 19:37:01,950 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 485 transitions. Word has length 20 [2021-07-13 19:37:01,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:01,950 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 485 transitions. [2021-07-13 19:37:01,950 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) [2021-07-13 19:37:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 485 transitions. [2021-07-13 19:37:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:01,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:01,951 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:02,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3933,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:02,151 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:02,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:02,151 INFO L82 PathProgramCache]: Analyzing trace with hash -212189635, now seen corresponding path program 523 times [2021-07-13 19:37:02,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:02,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270848956] [2021-07-13 19:37:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:02,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:02,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270848956] [2021-07-13 19:37:02,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270848956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:02,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966194689] [2021-07-13 19:37:02,322 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 [2021-07-13 19:37:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:02,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:02,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:02,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966194689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:02,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:02,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:02,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255606211] [2021-07-13 19:37:02,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:02,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:02,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:02,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:02,688 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) [2021-07-13 19:37:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:03,448 INFO L93 Difference]: Finished difference Result 284 states and 592 transitions. [2021-07-13 19:37:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:37:03,448 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 [2021-07-13 19:37:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:03,448 INFO L225 Difference]: With dead ends: 284 [2021-07-13 19:37:03,449 INFO L226 Difference]: Without dead ends: 268 [2021-07-13 19:37:03,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 850.2ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:37:03,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-13 19:37:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 225. [2021-07-13 19:37:03,450 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) [2021-07-13 19:37:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 499 transitions. [2021-07-13 19:37:03,451 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 499 transitions. Word has length 20 [2021-07-13 19:37:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:03,451 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 499 transitions. [2021-07-13 19:37:03,451 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) [2021-07-13 19:37:03,451 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 499 transitions. [2021-07-13 19:37:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:03,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:03,451 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:03,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3945,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:03,652 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:03,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2125594183, now seen corresponding path program 524 times [2021-07-13 19:37:03,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:03,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504835719] [2021-07-13 19:37:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:03,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:03,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504835719] [2021-07-13 19:37:03,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504835719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:03,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752828537] [2021-07-13 19:37:03,873 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 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 [2021-07-13 19:37:03,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:03,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:03,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:37:03,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:04,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752828537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:04,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:04,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:04,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387763459] [2021-07-13 19:37:04,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:04,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:04,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:04,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:04,339 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) [2021-07-13 19:37:04,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:04,737 INFO L93 Difference]: Finished difference Result 247 states and 533 transitions. [2021-07-13 19:37:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:37:04,738 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 [2021-07-13 19:37:04,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:04,738 INFO L225 Difference]: With dead ends: 247 [2021-07-13 19:37:04,738 INFO L226 Difference]: Without dead ends: 234 [2021-07-13 19:37:04,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 711.5ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:37:04,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-13 19:37:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2021-07-13 19:37:04,740 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) [2021-07-13 19:37:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 505 transitions. [2021-07-13 19:37:04,740 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 505 transitions. Word has length 20 [2021-07-13 19:37:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:04,740 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 505 transitions. [2021-07-13 19:37:04,740 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) [2021-07-13 19:37:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 505 transitions. [2021-07-13 19:37:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:04,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:04,741 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:04,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3957,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:04,941 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:04,941 INFO L82 PathProgramCache]: Analyzing trace with hash 592031383, now seen corresponding path program 525 times [2021-07-13 19:37:04,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:04,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739335223] [2021-07-13 19:37:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:05,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:05,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739335223] [2021-07-13 19:37:05,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739335223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:05,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496459882] [2021-07-13 19:37:05,173 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 [2021-07-13 19:37:05,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:37:05,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:05,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:05,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:05,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496459882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:05,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:05,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:05,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37609000] [2021-07-13 19:37:05,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:05,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:05,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:05,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:05,653 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) [2021-07-13 19:37:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:06,399 INFO L93 Difference]: Finished difference Result 279 states and 585 transitions. [2021-07-13 19:37:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:37:06,399 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 [2021-07-13 19:37:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:06,400 INFO L225 Difference]: With dead ends: 279 [2021-07-13 19:37:06,400 INFO L226 Difference]: Without dead ends: 254 [2021-07-13 19:37:06,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1017.4ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:37:06,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-13 19:37:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 228. [2021-07-13 19:37:06,402 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) [2021-07-13 19:37:06,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 505 transitions. [2021-07-13 19:37:06,402 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 505 transitions. Word has length 20 [2021-07-13 19:37:06,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:06,402 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 505 transitions. [2021-07-13 19:37:06,402 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) [2021-07-13 19:37:06,402 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 505 transitions. [2021-07-13 19:37:06,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:06,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:06,402 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:06,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-07-13 19:37:06,603 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:06,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:06,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1098377649, now seen corresponding path program 526 times [2021-07-13 19:37:06,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:06,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281390463] [2021-07-13 19:37:06,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:06,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:06,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281390463] [2021-07-13 19:37:06,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281390463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:06,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252855650] [2021-07-13 19:37:06,853 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 [2021-07-13 19:37:06,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:06,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:06,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:06,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:07,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252855650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:07,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:07,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:07,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864419189] [2021-07-13 19:37:07,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:07,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:07,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:07,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:07,255 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) [2021-07-13 19:37:08,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:08,453 INFO L93 Difference]: Finished difference Result 276 states and 586 transitions. [2021-07-13 19:37:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:37:08,453 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 [2021-07-13 19:37:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:08,453 INFO L225 Difference]: With dead ends: 276 [2021-07-13 19:37:08,453 INFO L226 Difference]: Without dead ends: 258 [2021-07-13 19:37:08,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1365.7ms TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:37:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-07-13 19:37:08,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 232. [2021-07-13 19:37:08,456 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) [2021-07-13 19:37:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 513 transitions. [2021-07-13 19:37:08,456 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 513 transitions. Word has length 20 [2021-07-13 19:37:08,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:08,456 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 513 transitions. [2021-07-13 19:37:08,456 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) [2021-07-13 19:37:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 513 transitions. [2021-07-13 19:37:08,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:08,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:08,456 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:08,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:08,657 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:08,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1861998317, now seen corresponding path program 527 times [2021-07-13 19:37:08,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:08,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488227463] [2021-07-13 19:37:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:08,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:08,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488227463] [2021-07-13 19:37:08,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488227463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:08,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973432920] [2021-07-13 19:37:08,823 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 [2021-07-13 19:37:08,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:37:08,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:08,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:37:08,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:09,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973432920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:09,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:09,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:09,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853792305] [2021-07-13 19:37:09,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:09,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:09,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:09,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:09,262 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) [2021-07-13 19:37:09,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:09,803 INFO L93 Difference]: Finished difference Result 285 states and 598 transitions. [2021-07-13 19:37:09,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:37:09,803 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 [2021-07-13 19:37:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:09,804 INFO L225 Difference]: With dead ends: 285 [2021-07-13 19:37:09,804 INFO L226 Difference]: Without dead ends: 259 [2021-07-13 19:37:09,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 776.4ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:37:09,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-07-13 19:37:09,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2021-07-13 19:37:09,806 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) [2021-07-13 19:37:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 519 transitions. [2021-07-13 19:37:09,806 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 519 transitions. Word has length 20 [2021-07-13 19:37:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:09,806 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 519 transitions. [2021-07-13 19:37:09,806 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) [2021-07-13 19:37:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 519 transitions. [2021-07-13 19:37:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:09,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:09,807 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:10,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3996 [2021-07-13 19:37:10,007 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:10,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:10,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1895113401, now seen corresponding path program 528 times [2021-07-13 19:37:10,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:10,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135775707] [2021-07-13 19:37:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:10,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:10,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135775707] [2021-07-13 19:37:10,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135775707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:10,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121259789] [2021-07-13 19:37:10,179 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 [2021-07-13 19:37:10,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:37:10,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:10,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:37:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:10,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121259789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:10,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:10,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:10,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352380723] [2021-07-13 19:37:10,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:10,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:10,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:10,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:10,584 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) [2021-07-13 19:37:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:11,409 INFO L93 Difference]: Finished difference Result 312 states and 656 transitions. [2021-07-13 19:37:11,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:37:11,409 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 [2021-07-13 19:37:11,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:11,410 INFO L225 Difference]: With dead ends: 312 [2021-07-13 19:37:11,410 INFO L226 Difference]: Without dead ends: 293 [2021-07-13 19:37:11,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 920.4ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:37:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-07-13 19:37:11,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 236. [2021-07-13 19:37:11,412 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) [2021-07-13 19:37:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 522 transitions. [2021-07-13 19:37:11,413 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 522 transitions. Word has length 20 [2021-07-13 19:37:11,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:11,413 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 522 transitions. [2021-07-13 19:37:11,413 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) [2021-07-13 19:37:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 522 transitions. [2021-07-13 19:37:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:11,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:11,413 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:11,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:11,613 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:11,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:11,614 INFO L82 PathProgramCache]: Analyzing trace with hash -384757289, now seen corresponding path program 529 times [2021-07-13 19:37:11,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:11,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942462661] [2021-07-13 19:37:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:11,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:11,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942462661] [2021-07-13 19:37:11,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942462661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:11,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44464802] [2021-07-13 19:37:11,860 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 [2021-07-13 19:37:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:11,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:11,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:12,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44464802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:12,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:12,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:12,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201243945] [2021-07-13 19:37:12,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:12,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:12,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:12,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:12,265 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) [2021-07-13 19:37:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:13,095 INFO L93 Difference]: Finished difference Result 282 states and 600 transitions. [2021-07-13 19:37:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:37:13,095 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 [2021-07-13 19:37:13,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:13,096 INFO L225 Difference]: With dead ends: 282 [2021-07-13 19:37:13,096 INFO L226 Difference]: Without dead ends: 268 [2021-07-13 19:37:13,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1017.2ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:37:13,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-07-13 19:37:13,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 238. [2021-07-13 19:37:13,098 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) [2021-07-13 19:37:13,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 526 transitions. [2021-07-13 19:37:13,098 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 526 transitions. Word has length 20 [2021-07-13 19:37:13,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:13,098 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 526 transitions. [2021-07-13 19:37:13,098 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) [2021-07-13 19:37:13,098 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 526 transitions. [2021-07-13 19:37:13,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:13,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:13,099 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:13,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4021,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:13,299 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:13,299 INFO L82 PathProgramCache]: Analyzing trace with hash 411978463, now seen corresponding path program 530 times [2021-07-13 19:37:13,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:13,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821598925] [2021-07-13 19:37:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:13,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:13,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821598925] [2021-07-13 19:37:13,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821598925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:13,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243314586] [2021-07-13 19:37:13,476 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 [2021-07-13 19:37:13,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:13,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:13,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:37:13,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:13,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243314586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:13,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:13,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:13,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844424118] [2021-07-13 19:37:13,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:13,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:13,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:13,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:13,883 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) [2021-07-13 19:37:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:14,410 INFO L93 Difference]: Finished difference Result 304 states and 642 transitions. [2021-07-13 19:37:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:37:14,410 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 [2021-07-13 19:37:14,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:14,411 INFO L225 Difference]: With dead ends: 304 [2021-07-13 19:37:14,411 INFO L226 Difference]: Without dead ends: 285 [2021-07-13 19:37:14,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 755.7ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:37:14,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-07-13 19:37:14,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 238. [2021-07-13 19:37:14,413 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) [2021-07-13 19:37:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 526 transitions. [2021-07-13 19:37:14,413 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 526 transitions. Word has length 20 [2021-07-13 19:37:14,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:14,413 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 526 transitions. [2021-07-13 19:37:14,413 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) [2021-07-13 19:37:14,413 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 526 transitions. [2021-07-13 19:37:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:14,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:14,414 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:14,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:14,614 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:14,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:14,614 INFO L82 PathProgramCache]: Analyzing trace with hash 918324729, now seen corresponding path program 531 times [2021-07-13 19:37:14,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:14,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678622597] [2021-07-13 19:37:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:14,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:14,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678622597] [2021-07-13 19:37:14,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678622597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:14,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162974366] [2021-07-13 19:37:14,840 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 [2021-07-13 19:37:14,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:37:14,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:14,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 19:37:14,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:15,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162974366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:15,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:15,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:15,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492544105] [2021-07-13 19:37:15,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:15,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:15,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:15,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:15,283 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) [2021-07-13 19:37:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:16,148 INFO L93 Difference]: Finished difference Result 322 states and 659 transitions. [2021-07-13 19:37:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:37:16,148 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 [2021-07-13 19:37:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:16,149 INFO L225 Difference]: With dead ends: 322 [2021-07-13 19:37:16,149 INFO L226 Difference]: Without dead ends: 297 [2021-07-13 19:37:16,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1117.2ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:37:16,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-07-13 19:37:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 239. [2021-07-13 19:37:16,151 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) [2021-07-13 19:37:16,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 528 transitions. [2021-07-13 19:37:16,152 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 528 transitions. Word has length 20 [2021-07-13 19:37:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:16,152 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 528 transitions. [2021-07-13 19:37:16,152 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) [2021-07-13 19:37:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 528 transitions. [2021-07-13 19:37:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:16,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:16,152 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:16,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:16,353 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:16,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:16,353 INFO L82 PathProgramCache]: Analyzing trace with hash -958444701, now seen corresponding path program 532 times [2021-07-13 19:37:16,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:16,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347599813] [2021-07-13 19:37:16,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:16,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:16,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347599813] [2021-07-13 19:37:16,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347599813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:16,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291966383] [2021-07-13 19:37:16,529 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 [2021-07-13 19:37:16,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:16,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:16,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:16,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:17,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291966383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:17,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:17,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:37:17,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353874399] [2021-07-13 19:37:17,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:37:17,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:17,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:37:17,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:37:17,007 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) [2021-07-13 19:37:17,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:17,915 INFO L93 Difference]: Finished difference Result 268 states and 583 transitions. [2021-07-13 19:37:17,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:37:17,915 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 [2021-07-13 19:37:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:17,915 INFO L225 Difference]: With dead ends: 268 [2021-07-13 19:37:17,915 INFO L226 Difference]: Without dead ends: 251 [2021-07-13 19:37:17,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1110.2ms TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:37:17,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-13 19:37:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 240. [2021-07-13 19:37:17,918 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) [2021-07-13 19:37:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-07-13 19:37:17,918 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-07-13 19:37:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:17,918 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-07-13 19:37:17,918 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) [2021-07-13 19:37:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-07-13 19:37:17,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:17,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:17,918 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:18,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4061 [2021-07-13 19:37:18,119 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:18,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:18,119 INFO L82 PathProgramCache]: Analyzing trace with hash -660391743, now seen corresponding path program 533 times [2021-07-13 19:37:18,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:18,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007722711] [2021-07-13 19:37:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:18,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:18,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007722711] [2021-07-13 19:37:18,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007722711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:18,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514743206] [2021-07-13 19:37:18,374 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 [2021-07-13 19:37:18,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:37:18,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:18,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:37:18,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:18,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514743206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:18,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:18,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:37:18,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691551435] [2021-07-13 19:37:18,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:37:18,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:18,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:37:18,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:37:18,891 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) [2021-07-13 19:37:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:19,476 INFO L93 Difference]: Finished difference Result 259 states and 558 transitions. [2021-07-13 19:37:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:37:19,477 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 [2021-07-13 19:37:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:19,477 INFO L225 Difference]: With dead ends: 259 [2021-07-13 19:37:19,477 INFO L226 Difference]: Without dead ends: 244 [2021-07-13 19:37:19,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 988.4ms TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:37:19,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-13 19:37:19,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2021-07-13 19:37:19,479 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) [2021-07-13 19:37:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-07-13 19:37:19,479 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-07-13 19:37:19,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:19,479 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-07-13 19:37:19,479 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) [2021-07-13 19:37:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-07-13 19:37:19,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:19,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:19,480 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:19,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:19,680 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:19,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:19,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1981622179, now seen corresponding path program 534 times [2021-07-13 19:37:19,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:19,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082103366] [2021-07-13 19:37:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:19,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:19,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082103366] [2021-07-13 19:37:19,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082103366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:19,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109457973] [2021-07-13 19:37:19,958 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 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 [2021-07-13 19:37:19,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:37:19,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:19,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:37:19,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:20,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109457973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:20,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:20,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:37:20,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697940090] [2021-07-13 19:37:20,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:37:20,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:20,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:37:20,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:37:20,502 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) [2021-07-13 19:37:21,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:21,195 INFO L93 Difference]: Finished difference Result 258 states and 557 transitions. [2021-07-13 19:37:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:37:21,196 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 [2021-07-13 19:37:21,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:21,196 INFO L225 Difference]: With dead ends: 258 [2021-07-13 19:37:21,196 INFO L226 Difference]: Without dead ends: 245 [2021-07-13 19:37:21,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1151.1ms TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:37:21,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-13 19:37:21,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-07-13 19:37:21,198 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) [2021-07-13 19:37:21,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-07-13 19:37:21,198 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-07-13 19:37:21,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:21,198 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-07-13 19:37:21,198 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) [2021-07-13 19:37:21,198 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-07-13 19:37:21,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:21,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:21,199 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:21,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4085 [2021-07-13 19:37:21,399 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:21,399 INFO L82 PathProgramCache]: Analyzing trace with hash 404280449, now seen corresponding path program 535 times [2021-07-13 19:37:21,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:21,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440275698] [2021-07-13 19:37:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:21,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:21,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440275698] [2021-07-13 19:37:21,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440275698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:21,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383715834] [2021-07-13 19:37:21,687 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 [2021-07-13 19:37:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:21,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:21,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:22,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383715834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:22,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:22,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:37:22,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663288724] [2021-07-13 19:37:22,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:37:22,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:22,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:37:22,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:37:22,189 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) [2021-07-13 19:37:23,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:23,608 INFO L93 Difference]: Finished difference Result 283 states and 603 transitions. [2021-07-13 19:37:23,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:37:23,608 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 [2021-07-13 19:37:23,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:23,609 INFO L225 Difference]: With dead ends: 283 [2021-07-13 19:37:23,609 INFO L226 Difference]: Without dead ends: 269 [2021-07-13 19:37:23,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1673.3ms TimeCoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:37:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-07-13 19:37:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 241. [2021-07-13 19:37:23,611 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) [2021-07-13 19:37:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-07-13 19:37:23,611 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-07-13 19:37:23,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:23,611 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-07-13 19:37:23,611 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) [2021-07-13 19:37:23,611 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-07-13 19:37:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:23,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:23,612 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:23,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4097 [2021-07-13 19:37:23,812 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:23,812 INFO L82 PathProgramCache]: Analyzing trace with hash 607065435, now seen corresponding path program 536 times [2021-07-13 19:37:23,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:23,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091203592] [2021-07-13 19:37:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:23,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:23,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091203592] [2021-07-13 19:37:23,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091203592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:23,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367946734] [2021-07-13 19:37:23,990 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 [2021-07-13 19:37:24,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:24,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:24,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:37:24,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:24,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367946734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:24,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:24,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:37:24,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364615025] [2021-07-13 19:37:24,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:37:24,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:24,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:37:24,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:37:24,506 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) [2021-07-13 19:37:25,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:25,051 INFO L93 Difference]: Finished difference Result 260 states and 560 transitions. [2021-07-13 19:37:25,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:37:25,052 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 [2021-07-13 19:37:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:25,052 INFO L225 Difference]: With dead ends: 260 [2021-07-13 19:37:25,052 INFO L226 Difference]: Without dead ends: 245 [2021-07-13 19:37:25,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 863.5ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:37:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-13 19:37:25,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-07-13 19:37:25,054 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) [2021-07-13 19:37:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-07-13 19:37:25,054 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-07-13 19:37:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:25,054 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-07-13 19:37:25,055 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) [2021-07-13 19:37:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-07-13 19:37:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:25,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:25,055 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:25,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-07-13 19:37:25,255 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:25,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1045887939, now seen corresponding path program 537 times [2021-07-13 19:37:25,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:25,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044848602] [2021-07-13 19:37:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:25,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:25,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044848602] [2021-07-13 19:37:25,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044848602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:25,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618100141] [2021-07-13 19:37:25,442 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 [2021-07-13 19:37:25,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:37:25,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:25,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:37:25,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:25,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618100141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:25,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:25,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:37:25,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772899342] [2021-07-13 19:37:25,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:37:25,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:25,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:37:25,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:37:25,897 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) [2021-07-13 19:37:27,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:27,152 INFO L93 Difference]: Finished difference Result 297 states and 622 transitions. [2021-07-13 19:37:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:37:27,152 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 [2021-07-13 19:37:27,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:27,153 INFO L225 Difference]: With dead ends: 297 [2021-07-13 19:37:27,153 INFO L226 Difference]: Without dead ends: 290 [2021-07-13 19:37:27,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1422.9ms TimeCoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:37:27,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-07-13 19:37:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 243. [2021-07-13 19:37:27,155 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) [2021-07-13 19:37:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 537 transitions. [2021-07-13 19:37:27,155 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 537 transitions. Word has length 20 [2021-07-13 19:37:27,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:27,155 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 537 transitions. [2021-07-13 19:37:27,155 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) [2021-07-13 19:37:27,155 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 537 transitions. [2021-07-13 19:37:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:27,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:27,156 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:27,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4124,538 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:27,356 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:27,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:27,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1671737627, now seen corresponding path program 538 times [2021-07-13 19:37:27,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:27,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317572545] [2021-07-13 19:37:27,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:27,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:27,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317572545] [2021-07-13 19:37:27,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317572545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:27,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904450473] [2021-07-13 19:37:27,624 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 [2021-07-13 19:37:27,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:27,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:27,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:37:27,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:28,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904450473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:28,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:28,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:37:28,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487782352] [2021-07-13 19:37:28,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:37:28,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:28,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:37:28,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:37:28,159 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) [2021-07-13 19:37:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:29,175 INFO L93 Difference]: Finished difference Result 290 states and 611 transitions. [2021-07-13 19:37:29,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:37:29,175 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 [2021-07-13 19:37:29,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:29,175 INFO L225 Difference]: With dead ends: 290 [2021-07-13 19:37:29,175 INFO L226 Difference]: Without dead ends: 266 [2021-07-13 19:37:29,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1342.8ms TimeCoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:37:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-07-13 19:37:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 242. [2021-07-13 19:37:29,177 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) [2021-07-13 19:37:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-07-13 19:37:29,178 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-07-13 19:37:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:29,178 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-07-13 19:37:29,178 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) [2021-07-13 19:37:29,178 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-07-13 19:37:29,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:29,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:29,178 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:29,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:29,379 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:29,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:29,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1765944419, now seen corresponding path program 539 times [2021-07-13 19:37:29,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:29,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800025954] [2021-07-13 19:37:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:29,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:29,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800025954] [2021-07-13 19:37:29,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800025954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:29,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908384244] [2021-07-13 19:37:29,603 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 [2021-07-13 19:37:29,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:37:29,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:29,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:29,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:30,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908384244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:30,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:30,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:37:30,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747992765] [2021-07-13 19:37:30,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:37:30,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:30,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:37:30,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:37:30,081 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) [2021-07-13 19:37:30,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:30,596 INFO L93 Difference]: Finished difference Result 259 states and 559 transitions. [2021-07-13 19:37:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:37:30,596 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 [2021-07-13 19:37:30,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:30,596 INFO L225 Difference]: With dead ends: 259 [2021-07-13 19:37:30,596 INFO L226 Difference]: Without dead ends: 246 [2021-07-13 19:37:30,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 868.5ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:37:30,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-13 19:37:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2021-07-13 19:37:30,599 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) [2021-07-13 19:37:30,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 536 transitions. [2021-07-13 19:37:30,599 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 536 transitions. Word has length 20 [2021-07-13 19:37:30,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:30,599 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 536 transitions. [2021-07-13 19:37:30,599 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) [2021-07-13 19:37:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 536 transitions. [2021-07-13 19:37:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:30,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:30,600 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:30,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4151,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:30,800 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:30,800 INFO L82 PathProgramCache]: Analyzing trace with hash 188602689, now seen corresponding path program 540 times [2021-07-13 19:37:30,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:30,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342483579] [2021-07-13 19:37:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:31,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:31,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342483579] [2021-07-13 19:37:31,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342483579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:31,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640494592] [2021-07-13 19:37:31,052 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 [2021-07-13 19:37:31,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:37:31,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:31,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:37:31,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:31,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640494592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:31,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:31,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:37:31,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737670095] [2021-07-13 19:37:31,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:37:31,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:31,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:37:31,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:37:31,494 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) [2021-07-13 19:37:32,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:32,696 INFO L93 Difference]: Finished difference Result 284 states and 605 transitions. [2021-07-13 19:37:32,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:37:32,697 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 [2021-07-13 19:37:32,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:32,697 INFO L225 Difference]: With dead ends: 284 [2021-07-13 19:37:32,697 INFO L226 Difference]: Without dead ends: 270 [2021-07-13 19:37:32,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1426.8ms TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:37:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-07-13 19:37:32,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 242. [2021-07-13 19:37:32,699 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) [2021-07-13 19:37:32,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-07-13 19:37:32,699 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-07-13 19:37:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:32,700 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-07-13 19:37:32,700 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) [2021-07-13 19:37:32,700 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-07-13 19:37:32,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:32,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:32,700 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:32,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4163 [2021-07-13 19:37:32,900 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:32,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:32,901 INFO L82 PathProgramCache]: Analyzing trace with hash 694948955, now seen corresponding path program 541 times [2021-07-13 19:37:32,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:32,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990444105] [2021-07-13 19:37:32,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:33,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:33,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990444105] [2021-07-13 19:37:33,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990444105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:33,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509074670] [2021-07-13 19:37:33,092 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 [2021-07-13 19:37:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:33,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:33,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:33,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509074670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:33,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:33,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:37:33,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038033444] [2021-07-13 19:37:33,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:37:33,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:33,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:37:33,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:37:33,556 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) [2021-07-13 19:37:34,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:34,316 INFO L93 Difference]: Finished difference Result 283 states and 601 transitions. [2021-07-13 19:37:34,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:37:34,316 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 [2021-07-13 19:37:34,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:34,317 INFO L225 Difference]: With dead ends: 283 [2021-07-13 19:37:34,317 INFO L226 Difference]: Without dead ends: 265 [2021-07-13 19:37:34,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 968.5ms TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:37:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-13 19:37:34,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 240. [2021-07-13 19:37:34,319 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) [2021-07-13 19:37:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-07-13 19:37:34,319 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-07-13 19:37:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:34,319 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-07-13 19:37:34,319 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) [2021-07-13 19:37:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-07-13 19:37:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:34,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:34,319 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:34,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4176 [2021-07-13 19:37:34,520 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:34,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:34,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1243532289, now seen corresponding path program 542 times [2021-07-13 19:37:34,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:34,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759235222] [2021-07-13 19:37:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:34,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:34,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759235222] [2021-07-13 19:37:34,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759235222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:34,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905351275] [2021-07-13 19:37:34,760 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 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 [2021-07-13 19:37:34,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:34,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:34,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:37:34,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:35,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905351275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:35,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:35,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:35,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505951232] [2021-07-13 19:37:35,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:35,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:35,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:35,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:35,240 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) [2021-07-13 19:37:35,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:35,655 INFO L93 Difference]: Finished difference Result 259 states and 558 transitions. [2021-07-13 19:37:35,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:37:35,655 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 [2021-07-13 19:37:35,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:35,656 INFO L225 Difference]: With dead ends: 259 [2021-07-13 19:37:35,656 INFO L226 Difference]: Without dead ends: 244 [2021-07-13 19:37:35,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 786.8ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:37:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-13 19:37:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2021-07-13 19:37:35,658 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) [2021-07-13 19:37:35,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-07-13 19:37:35,658 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-07-13 19:37:35,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:35,658 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-07-13 19:37:35,658 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) [2021-07-13 19:37:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-07-13 19:37:35,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:35,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:35,658 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:35,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4188 [2021-07-13 19:37:35,859 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:35,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:35,859 INFO L82 PathProgramCache]: Analyzing trace with hash -409421085, now seen corresponding path program 543 times [2021-07-13 19:37:35,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:35,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780263638] [2021-07-13 19:37:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:36,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:36,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780263638] [2021-07-13 19:37:36,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780263638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:36,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211921235] [2021-07-13 19:37:36,065 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 [2021-07-13 19:37:36,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:37:36,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:36,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 19:37:36,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:36,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211921235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:36,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:36,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:36,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198454435] [2021-07-13 19:37:36,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:36,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:36,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:36,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:36,488 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) [2021-07-13 19:37:36,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:36,971 INFO L93 Difference]: Finished difference Result 258 states and 557 transitions. [2021-07-13 19:37:36,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:37:36,971 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 [2021-07-13 19:37:36,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:36,972 INFO L225 Difference]: With dead ends: 258 [2021-07-13 19:37:36,972 INFO L226 Difference]: Without dead ends: 245 [2021-07-13 19:37:36,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 772.7ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:37:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-13 19:37:36,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-07-13 19:37:36,974 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) [2021-07-13 19:37:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-07-13 19:37:36,974 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-07-13 19:37:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:36,974 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-07-13 19:37:36,974 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) [2021-07-13 19:37:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-07-13 19:37:36,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:36,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:36,974 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:37,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4200 [2021-07-13 19:37:37,175 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:37,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:37,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1986762815, now seen corresponding path program 544 times [2021-07-13 19:37:37,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:37,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342850777] [2021-07-13 19:37:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:37,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:37,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342850777] [2021-07-13 19:37:37,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342850777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:37,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105419563] [2021-07-13 19:37:37,385 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 [2021-07-13 19:37:37,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:37,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:37,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:37,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:37,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105419563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:37,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:37,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:37,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236189438] [2021-07-13 19:37:37,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:37,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:37,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:37,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:37,879 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) [2021-07-13 19:37:39,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:39,451 INFO L93 Difference]: Finished difference Result 317 states and 664 transitions. [2021-07-13 19:37:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:37:39,451 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 [2021-07-13 19:37:39,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:39,452 INFO L225 Difference]: With dead ends: 317 [2021-07-13 19:37:39,452 INFO L226 Difference]: Without dead ends: 299 [2021-07-13 19:37:39,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1787.3ms TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:37:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-07-13 19:37:39,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 240. [2021-07-13 19:37:39,454 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) [2021-07-13 19:37:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-07-13 19:37:39,454 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-07-13 19:37:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:39,454 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-07-13 19:37:39,455 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) [2021-07-13 19:37:39,455 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-07-13 19:37:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:39,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:39,455 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:39,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4214 [2021-07-13 19:37:39,655 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:39,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1288305703, now seen corresponding path program 545 times [2021-07-13 19:37:39,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:39,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440109878] [2021-07-13 19:37:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:39,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:39,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440109878] [2021-07-13 19:37:39,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440109878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:39,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464549820] [2021-07-13 19:37:39,835 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 [2021-07-13 19:37:39,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:37:39,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:39,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:39,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:40,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464549820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:40,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:40,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:40,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65883247] [2021-07-13 19:37:40,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:40,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:40,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:40,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:40,213 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) [2021-07-13 19:37:40,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:40,953 INFO L93 Difference]: Finished difference Result 297 states and 623 transitions. [2021-07-13 19:37:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:37:40,953 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 [2021-07-13 19:37:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:40,954 INFO L225 Difference]: With dead ends: 297 [2021-07-13 19:37:40,954 INFO L226 Difference]: Without dead ends: 281 [2021-07-13 19:37:40,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 865.4ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:37:40,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-13 19:37:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 237. [2021-07-13 19:37:40,956 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) [2021-07-13 19:37:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 523 transitions. [2021-07-13 19:37:40,956 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 523 transitions. Word has length 20 [2021-07-13 19:37:40,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:40,956 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 523 transitions. [2021-07-13 19:37:40,956 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) [2021-07-13 19:37:40,956 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 523 transitions. [2021-07-13 19:37:40,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:40,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:40,957 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:41,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4226,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:41,157 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:41,157 INFO L82 PathProgramCache]: Analyzing trace with hash -625098845, now seen corresponding path program 546 times [2021-07-13 19:37:41,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:41,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972318971] [2021-07-13 19:37:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:41,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:41,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972318971] [2021-07-13 19:37:41,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972318971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:41,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065088890] [2021-07-13 19:37:41,375 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 [2021-07-13 19:37:41,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:37:41,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:41,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 19:37:41,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:41,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065088890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:41,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:41,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:41,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086482573] [2021-07-13 19:37:41,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:41,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:41,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:41,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:41,776 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) [2021-07-13 19:37:42,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:42,370 INFO L93 Difference]: Finished difference Result 281 states and 589 transitions. [2021-07-13 19:37:42,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:37:42,371 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 [2021-07-13 19:37:42,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:42,371 INFO L225 Difference]: With dead ends: 281 [2021-07-13 19:37:42,371 INFO L226 Difference]: Without dead ends: 261 [2021-07-13 19:37:42,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 828.1ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:37:42,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-13 19:37:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2021-07-13 19:37:42,373 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) [2021-07-13 19:37:42,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-07-13 19:37:42,374 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-07-13 19:37:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:42,374 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-07-13 19:37:42,374 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) [2021-07-13 19:37:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-07-13 19:37:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:42,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:42,374 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:42,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4238,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:42,575 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:42,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:42,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2092526721, now seen corresponding path program 547 times [2021-07-13 19:37:42,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:42,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582999406] [2021-07-13 19:37:42,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:42,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:42,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582999406] [2021-07-13 19:37:42,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582999406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:42,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224622777] [2021-07-13 19:37:42,879 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 [2021-07-13 19:37:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:42,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:42,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:43,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224622777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:43,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:43,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:43,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936307225] [2021-07-13 19:37:43,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:43,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:43,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:43,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:43,449 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) [2021-07-13 19:37:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:45,124 INFO L93 Difference]: Finished difference Result 309 states and 648 transitions. [2021-07-13 19:37:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:37:45,124 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 [2021-07-13 19:37:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:45,125 INFO L225 Difference]: With dead ends: 309 [2021-07-13 19:37:45,125 INFO L226 Difference]: Without dead ends: 291 [2021-07-13 19:37:45,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 2008.3ms TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:37:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-07-13 19:37:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 244. [2021-07-13 19:37:45,127 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) [2021-07-13 19:37:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 541 transitions. [2021-07-13 19:37:45,128 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 541 transitions. Word has length 20 [2021-07-13 19:37:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:45,128 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 541 transitions. [2021-07-13 19:37:45,128 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) [2021-07-13 19:37:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 541 transitions. [2021-07-13 19:37:45,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:45,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:45,128 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:45,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4252 [2021-07-13 19:37:45,328 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:45,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:45,329 INFO L82 PathProgramCache]: Analyzing trace with hash -361502979, now seen corresponding path program 548 times [2021-07-13 19:37:45,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:45,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927480657] [2021-07-13 19:37:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:45,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:45,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927480657] [2021-07-13 19:37:45,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927480657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:45,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477235568] [2021-07-13 19:37:45,533 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 [2021-07-13 19:37:45,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:45,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:45,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:37:45,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:45,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477235568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:45,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:45,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:45,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735047827] [2021-07-13 19:37:45,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:45,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:45,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:45,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:45,982 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) [2021-07-13 19:37:47,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:47,049 INFO L93 Difference]: Finished difference Result 315 states and 660 transitions. [2021-07-13 19:37:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:37:47,049 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 [2021-07-13 19:37:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:47,049 INFO L225 Difference]: With dead ends: 315 [2021-07-13 19:37:47,050 INFO L226 Difference]: Without dead ends: 296 [2021-07-13 19:37:47,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1300.6ms TimeCoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:37:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-13 19:37:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 247. [2021-07-13 19:37:47,052 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) [2021-07-13 19:37:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 548 transitions. [2021-07-13 19:37:47,052 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 548 transitions. Word has length 20 [2021-07-13 19:37:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:47,052 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 548 transitions. [2021-07-13 19:37:47,052 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) [2021-07-13 19:37:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 548 transitions. [2021-07-13 19:37:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:47,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:47,052 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:47,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4264,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:47,253 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:47,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1115738049, now seen corresponding path program 549 times [2021-07-13 19:37:47,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:47,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636632061] [2021-07-13 19:37:47,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:47,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:47,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636632061] [2021-07-13 19:37:47,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636632061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:47,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929352067] [2021-07-13 19:37:47,462 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 [2021-07-13 19:37:47,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:37:47,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:47,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 19:37:47,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:47,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929352067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:47,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:47,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:47,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80903127] [2021-07-13 19:37:47,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:47,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:47,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:47,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:47,851 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) [2021-07-13 19:37:48,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:48,602 INFO L93 Difference]: Finished difference Result 296 states and 631 transitions. [2021-07-13 19:37:48,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:37:48,602 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 [2021-07-13 19:37:48,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:48,602 INFO L225 Difference]: With dead ends: 296 [2021-07-13 19:37:48,602 INFO L226 Difference]: Without dead ends: 278 [2021-07-13 19:37:48,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 901.0ms TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:37:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-07-13 19:37:48,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 251. [2021-07-13 19:37:48,604 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) [2021-07-13 19:37:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 556 transitions. [2021-07-13 19:37:48,605 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 556 transitions. Word has length 20 [2021-07-13 19:37:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:48,605 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 556 transitions. [2021-07-13 19:37:48,605 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) [2021-07-13 19:37:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 556 transitions. [2021-07-13 19:37:48,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:48,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:48,605 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:48,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4277 [2021-07-13 19:37:48,806 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:48,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:48,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1912473801, now seen corresponding path program 550 times [2021-07-13 19:37:48,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:48,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76120394] [2021-07-13 19:37:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:48,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:48,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76120394] [2021-07-13 19:37:48,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76120394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:48,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986468532] [2021-07-13 19:37:48,983 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 [2021-07-13 19:37:49,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:49,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:49,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:49,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:49,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986468532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:49,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:49,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:49,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208323654] [2021-07-13 19:37:49,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:49,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:49,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:49,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:49,343 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) [2021-07-13 19:37:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:50,952 INFO L93 Difference]: Finished difference Result 357 states and 733 transitions. [2021-07-13 19:37:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:37:50,952 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 [2021-07-13 19:37:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:50,952 INFO L225 Difference]: With dead ends: 357 [2021-07-13 19:37:50,952 INFO L226 Difference]: Without dead ends: 314 [2021-07-13 19:37:50,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1640.8ms TimeCoverageRelationStatistics Valid=291, Invalid=1965, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:37:50,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-07-13 19:37:50,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 254. [2021-07-13 19:37:50,955 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) [2021-07-13 19:37:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 563 transitions. [2021-07-13 19:37:50,955 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 563 transitions. Word has length 20 [2021-07-13 19:37:50,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:50,955 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 563 transitions. [2021-07-13 19:37:50,955 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) [2021-07-13 19:37:50,955 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 563 transitions. [2021-07-13 19:37:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:50,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:50,956 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:51,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4291,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:51,156 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:51,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1876147229, now seen corresponding path program 551 times [2021-07-13 19:37:51,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:51,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318165536] [2021-07-13 19:37:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:51,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:51,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318165536] [2021-07-13 19:37:51,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318165536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:51,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962702016] [2021-07-13 19:37:51,354 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 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 [2021-07-13 19:37:51,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:37:51,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:51,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:51,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:51,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962702016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:51,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:51,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:51,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126601375] [2021-07-13 19:37:51,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:51,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:51,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:51,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:51,794 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) [2021-07-13 19:37:52,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:52,731 INFO L93 Difference]: Finished difference Result 332 states and 704 transitions. [2021-07-13 19:37:52,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:37:52,732 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 [2021-07-13 19:37:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:52,732 INFO L225 Difference]: With dead ends: 332 [2021-07-13 19:37:52,732 INFO L226 Difference]: Without dead ends: 313 [2021-07-13 19:37:52,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1068.9ms TimeCoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:37:52,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-07-13 19:37:52,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 256. [2021-07-13 19:37:52,735 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) [2021-07-13 19:37:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-07-13 19:37:52,735 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-07-13 19:37:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:52,735 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-07-13 19:37:52,735 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) [2021-07-13 19:37:52,735 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-07-13 19:37:52,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:52,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:52,735 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:52,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:52,936 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:52,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:52,936 INFO L82 PathProgramCache]: Analyzing trace with hash -500831717, now seen corresponding path program 552 times [2021-07-13 19:37:52,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:52,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150895795] [2021-07-13 19:37:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:53,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:53,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150895795] [2021-07-13 19:37:53,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150895795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:53,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749070344] [2021-07-13 19:37:53,177 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 [2021-07-13 19:37:53,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:37:53,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:53,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:37:53,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:53,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749070344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:53,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:53,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:53,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967413682] [2021-07-13 19:37:53,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:53,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:53,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:53,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:53,649 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) [2021-07-13 19:37:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:54,077 INFO L93 Difference]: Finished difference Result 275 states and 597 transitions. [2021-07-13 19:37:54,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:37:54,077 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 [2021-07-13 19:37:54,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:54,078 INFO L225 Difference]: With dead ends: 275 [2021-07-13 19:37:54,078 INFO L226 Difference]: Without dead ends: 260 [2021-07-13 19:37:54,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 797.0ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:37:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-13 19:37:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2021-07-13 19:37:54,080 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) [2021-07-13 19:37:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 571 transitions. [2021-07-13 19:37:54,080 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 571 transitions. Word has length 20 [2021-07-13 19:37:54,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:54,080 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 571 transitions. [2021-07-13 19:37:54,080 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) [2021-07-13 19:37:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 571 transitions. [2021-07-13 19:37:54,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:54,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:54,081 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:54,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4317,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:54,281 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:54,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:54,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2141182205, now seen corresponding path program 553 times [2021-07-13 19:37:54,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:54,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585921438] [2021-07-13 19:37:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:54,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:54,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585921438] [2021-07-13 19:37:54,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585921438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:54,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290722807] [2021-07-13 19:37:54,536 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 [2021-07-13 19:37:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:54,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:54,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:55,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290722807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:55,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:55,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:55,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841063846] [2021-07-13 19:37:55,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:55,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:55,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:55,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:55,033 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) [2021-07-13 19:37:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:55,457 INFO L93 Difference]: Finished difference Result 274 states and 596 transitions. [2021-07-13 19:37:55,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:37:55,457 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 [2021-07-13 19:37:55,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:55,458 INFO L225 Difference]: With dead ends: 274 [2021-07-13 19:37:55,458 INFO L226 Difference]: Without dead ends: 261 [2021-07-13 19:37:55,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 829.5ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:37:55,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-07-13 19:37:55,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2021-07-13 19:37:55,460 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) [2021-07-13 19:37:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 573 transitions. [2021-07-13 19:37:55,460 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 573 transitions. Word has length 20 [2021-07-13 19:37:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:55,460 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 573 transitions. [2021-07-13 19:37:55,460 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) [2021-07-13 19:37:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 573 transitions. [2021-07-13 19:37:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:55,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:55,460 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:55,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4329 [2021-07-13 19:37:55,661 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:55,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:55,661 INFO L82 PathProgramCache]: Analyzing trace with hash 563840475, now seen corresponding path program 554 times [2021-07-13 19:37:55,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:55,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482687400] [2021-07-13 19:37:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:55,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:55,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482687400] [2021-07-13 19:37:55,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482687400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:55,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044085906] [2021-07-13 19:37:55,949 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 [2021-07-13 19:37:55,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:37:55,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:55,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:37:55,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:56,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044085906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:56,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:56,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:56,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799025744] [2021-07-13 19:37:56,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:56,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:56,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:56,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:56,468 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) [2021-07-13 19:37:57,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:57,275 INFO L93 Difference]: Finished difference Result 299 states and 640 transitions. [2021-07-13 19:37:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:37:57,276 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 [2021-07-13 19:37:57,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:57,276 INFO L225 Difference]: With dead ends: 299 [2021-07-13 19:37:57,276 INFO L226 Difference]: Without dead ends: 281 [2021-07-13 19:37:57,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1139.7ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:37:57,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-13 19:37:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 256. [2021-07-13 19:37:57,278 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) [2021-07-13 19:37:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-07-13 19:37:57,279 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-07-13 19:37:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:57,279 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-07-13 19:37:57,279 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) [2021-07-13 19:37:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-07-13 19:37:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:57,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:57,279 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:57,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4341,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:37:57,479 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:57,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:57,480 INFO L82 PathProgramCache]: Analyzing trace with hash 658047267, now seen corresponding path program 555 times [2021-07-13 19:37:57,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:57,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561678198] [2021-07-13 19:37:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:57,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:57,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561678198] [2021-07-13 19:37:57,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561678198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:57,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717309575] [2021-07-13 19:37:57,723 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 [2021-07-13 19:37:57,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:37:57,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:57,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:57,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:58,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717309575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:58,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:58,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:58,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101572808] [2021-07-13 19:37:58,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:58,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:58,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:58,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:58,158 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) [2021-07-13 19:37:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:58,721 INFO L93 Difference]: Finished difference Result 284 states and 611 transitions. [2021-07-13 19:37:58,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:37:58,722 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 [2021-07-13 19:37:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:58,722 INFO L225 Difference]: With dead ends: 284 [2021-07-13 19:37:58,722 INFO L226 Difference]: Without dead ends: 277 [2021-07-13 19:37:58,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 868.7ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:37:58,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-07-13 19:37:58,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 257. [2021-07-13 19:37:58,724 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) [2021-07-13 19:37:58,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 572 transitions. [2021-07-13 19:37:58,725 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 572 transitions. Word has length 20 [2021-07-13 19:37:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:58,725 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 572 transitions. [2021-07-13 19:37:58,725 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) [2021-07-13 19:37:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 572 transitions. [2021-07-13 19:37:58,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:37:58,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:58,725 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:58,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4353 [2021-07-13 19:37:58,925 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:58,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:58,926 INFO L82 PathProgramCache]: Analyzing trace with hash -919294463, now seen corresponding path program 556 times [2021-07-13 19:37:58,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:58,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196974784] [2021-07-13 19:37:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:59,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196974784] [2021-07-13 19:37:59,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196974784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914657733] [2021-07-13 19:37:59,180 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 [2021-07-13 19:37:59,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:37:59,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:37:59,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:37:59,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:37:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:59,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914657733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:37:59,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:37:59,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:37:59,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966478691] [2021-07-13 19:37:59,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:37:59,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:59,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:37:59,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:37:59,655 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) [2021-07-13 19:38:00,643 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-07-13 19:38:00,802 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-07-13 19:38:00,968 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-07-13 19:38:01,348 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-07-13 19:38:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:01,380 INFO L93 Difference]: Finished difference Result 322 states and 680 transitions. [2021-07-13 19:38:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:38:01,381 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 [2021-07-13 19:38:01,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:01,381 INFO L225 Difference]: With dead ends: 322 [2021-07-13 19:38:01,381 INFO L226 Difference]: Without dead ends: 298 [2021-07-13 19:38:01,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2010.2ms TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:38:01,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-07-13 19:38:01,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 256. [2021-07-13 19:38:01,383 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) [2021-07-13 19:38:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-07-13 19:38:01,384 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-07-13 19:38:01,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:01,384 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-07-13 19:38:01,384 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) [2021-07-13 19:38:01,384 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-07-13 19:38:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:01,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:01,384 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:01,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4368,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:01,585 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:01,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:01,585 INFO L82 PathProgramCache]: Analyzing trace with hash -412948197, now seen corresponding path program 557 times [2021-07-13 19:38:01,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:01,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981513124] [2021-07-13 19:38:01,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:01,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:01,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981513124] [2021-07-13 19:38:01,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981513124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:01,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120343259] [2021-07-13 19:38:01,846 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 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 [2021-07-13 19:38:01,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:38:01,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:01,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:38:01,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:02,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120343259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:02,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:02,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:02,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914920131] [2021-07-13 19:38:02,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:02,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:02,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:02,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:02,297 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) [2021-07-13 19:38:03,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:03,170 INFO L93 Difference]: Finished difference Result 318 states and 667 transitions. [2021-07-13 19:38:03,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:38:03,170 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 [2021-07-13 19:38:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:03,171 INFO L225 Difference]: With dead ends: 318 [2021-07-13 19:38:03,171 INFO L226 Difference]: Without dead ends: 300 [2021-07-13 19:38:03,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1181.0ms TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:38:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-13 19:38:03,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 256. [2021-07-13 19:38:03,173 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) [2021-07-13 19:38:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-07-13 19:38:03,174 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-07-13 19:38:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:03,174 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-07-13 19:38:03,174 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) [2021-07-13 19:38:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-07-13 19:38:03,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:03,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:03,174 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:03,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4380,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:03,375 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:03,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1753934048, now seen corresponding path program 558 times [2021-07-13 19:38:03,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:03,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627189548] [2021-07-13 19:38:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:03,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:03,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627189548] [2021-07-13 19:38:03,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627189548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:03,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918134771] [2021-07-13 19:38:03,465 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 [2021-07-13 19:38:03,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:38:03,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:03,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:38:03,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:03,869 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 19:38:03,869 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 [2021-07-13 19:38:03,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,880 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 19:38:03,881 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 [2021-07-13 19:38:03,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,890 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:03,890 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 [2021-07-13 19:38:03,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,898 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:03,898 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 [2021-07-13 19:38:03,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,908 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 19:38:03,908 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 [2021-07-13 19:38:03,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,917 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:03,917 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 [2021-07-13 19:38:03,917 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:03,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:03,922 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 [2021-07-13 19:38:03,923 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,930 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:03,930 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 [2021-07-13 19:38:03,931 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:03,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:03,936 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 [2021-07-13 19:38:03,936 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,943 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:03,943 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 [2021-07-13 19:38:03,944 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,951 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:03,951 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 [2021-07-13 19:38:03,952 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:03,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:03,957 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 [2021-07-13 19:38:03,957 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,965 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:03,966 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 [2021-07-13 19:38:03,966 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:03,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:03,971 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 [2021-07-13 19:38:03,972 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,980 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:03,980 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 [2021-07-13 19:38:03,981 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,988 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:03,989 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 [2021-07-13 19:38:03,990 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:03,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:03,995 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:38:03,995 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:03,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,000 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 [2021-07-13 19:38:04,001 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,008 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,008 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 [2021-07-13 19:38:04,009 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,016 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,016 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 [2021-07-13 19:38:04,017 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,023 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,024 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 [2021-07-13 19:38:04,024 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,032 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,032 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 [2021-07-13 19:38:04,033 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,040 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,040 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 [2021-07-13 19:38:04,040 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,047 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,047 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 [2021-07-13 19:38:04,048 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,052 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 [2021-07-13 19:38:04,053 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,061 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,061 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 29 treesize of output 21 [2021-07-13 19:38:04,062 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,069 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,069 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 [2021-07-13 19:38:04,070 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,075 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-13 19:38:04,076 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,081 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 [2021-07-13 19:38:04,082 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,090 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,091 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 [2021-07-13 19:38:04,091 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,095 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:04,096 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,103 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,103 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 [2021-07-13 19:38:04,104 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,111 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,111 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 [2021-07-13 19:38:04,111 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:04,115 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,120 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 [2021-07-13 19:38:04,121 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,128 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,128 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 [2021-07-13 19:38:04,128 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,135 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,135 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 [2021-07-13 19:38:04,136 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,143 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,144 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 [2021-07-13 19:38:04,144 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:04,148 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,152 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 [2021-07-13 19:38:04,153 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:04,157 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:04,161 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,170 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,171 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 [2021-07-13 19:38:04,171 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,178 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,178 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 [2021-07-13 19:38:04,178 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,185 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,185 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 [2021-07-13 19:38:04,185 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,192 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,192 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 [2021-07-13 19:38:04,193 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:04,196 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,202 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,202 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 [2021-07-13 19:38:04,203 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,207 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 [2021-07-13 19:38:04,208 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,214 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 19:38:04,215 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 [2021-07-13 19:38:04,215 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,219 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 [2021-07-13 19:38:04,220 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:04,223 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:38:04,227 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 [2021-07-13 19:38:04,228 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:04,230 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:04,292 INFO L628 ElimStorePlain]: treesize reduction 117, result has 34.6 percent of original size [2021-07-13 19:38:04,293 INFO L518 ElimStorePlain]: Eliminatee scoreA vanished before elimination [2021-07-13 19:38:04,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:38:04,294 INFO L247 ElimStorePlain]: Needed 55 recursive calls to eliminate 3 variables, input treesize:2437, output treesize:44 [2021-07-13 19:38:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:04,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918134771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:04,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:04,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 19:38:04,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780108957] [2021-07-13 19:38:04,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:38:04,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:04,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:38:04,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:38:04,383 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) [2021-07-13 19:38:05,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:05,428 INFO L93 Difference]: Finished difference Result 367 states and 764 transitions. [2021-07-13 19:38:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:38:05,429 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 [2021-07-13 19:38:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:05,429 INFO L225 Difference]: With dead ends: 367 [2021-07-13 19:38:05,429 INFO L226 Difference]: Without dead ends: 365 [2021-07-13 19:38:05,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1129.3ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:38:05,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-07-13 19:38:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 281. [2021-07-13 19:38:05,432 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) [2021-07-13 19:38:05,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-07-13 19:38:05,432 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-07-13 19:38:05,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:05,432 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-07-13 19:38:05,432 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) [2021-07-13 19:38:05,432 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-07-13 19:38:05,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:05,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:05,432 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:05,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4392 [2021-07-13 19:38:05,633 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:05,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1878238050, now seen corresponding path program 559 times [2021-07-13 19:38:05,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:05,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480609393] [2021-07-13 19:38:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:05,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:05,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480609393] [2021-07-13 19:38:05,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480609393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:05,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448695621] [2021-07-13 19:38:05,723 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 [2021-07-13 19:38:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:38:05,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:05,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448695621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:05,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:05,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:38:05,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708407424] [2021-07-13 19:38:05,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:38:05,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:05,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:38:05,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:38:05,928 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) [2021-07-13 19:38:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:06,303 INFO L93 Difference]: Finished difference Result 319 states and 697 transitions. [2021-07-13 19:38:06,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:38:06,303 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 [2021-07-13 19:38:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:06,304 INFO L225 Difference]: With dead ends: 319 [2021-07-13 19:38:06,304 INFO L226 Difference]: Without dead ends: 316 [2021-07-13 19:38:06,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:38:06,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-13 19:38:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 281. [2021-07-13 19:38:06,306 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) [2021-07-13 19:38:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 626 transitions. [2021-07-13 19:38:06,307 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 626 transitions. Word has length 20 [2021-07-13 19:38:06,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:06,307 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 626 transitions. [2021-07-13 19:38:06,307 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) [2021-07-13 19:38:06,307 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 626 transitions. [2021-07-13 19:38:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:06,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:06,307 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:06,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4450 [2021-07-13 19:38:06,508 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:06,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:06,508 INFO L82 PathProgramCache]: Analyzing trace with hash 383787555, now seen corresponding path program 560 times [2021-07-13 19:38:06,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:06,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557109964] [2021-07-13 19:38:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:06,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:06,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557109964] [2021-07-13 19:38:06,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557109964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:06,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695537959] [2021-07-13 19:38:06,679 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 [2021-07-13 19:38:06,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:06,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:06,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:38:06,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:07,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695537959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:07,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:07,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:07,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234980097] [2021-07-13 19:38:07,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:07,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:07,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:07,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:07,085 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) [2021-07-13 19:38:07,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:07,651 INFO L93 Difference]: Finished difference Result 333 states and 719 transitions. [2021-07-13 19:38:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:38:07,651 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 [2021-07-13 19:38:07,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:07,652 INFO L225 Difference]: With dead ends: 333 [2021-07-13 19:38:07,652 INFO L226 Difference]: Without dead ends: 312 [2021-07-13 19:38:07,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 768.8ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:38:07,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-07-13 19:38:07,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-07-13 19:38:07,654 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) [2021-07-13 19:38:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-07-13 19:38:07,654 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-07-13 19:38:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:07,655 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-07-13 19:38:07,655 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) [2021-07-13 19:38:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-07-13 19:38:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:07,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:07,655 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:07,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4458,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:07,855 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:07,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1682754045, now seen corresponding path program 561 times [2021-07-13 19:38:07,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:07,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699784846] [2021-07-13 19:38:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:08,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:08,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699784846] [2021-07-13 19:38:08,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699784846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:08,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225517640] [2021-07-13 19:38:08,026 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 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 [2021-07-13 19:38:08,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:38:08,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:38:08,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:08,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225517640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:08,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:08,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:08,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721852635] [2021-07-13 19:38:08,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:08,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:08,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:08,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:08,506 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) [2021-07-13 19:38:09,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:09,344 INFO L93 Difference]: Finished difference Result 338 states and 718 transitions. [2021-07-13 19:38:09,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:38:09,344 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 [2021-07-13 19:38:09,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:09,344 INFO L225 Difference]: With dead ends: 338 [2021-07-13 19:38:09,344 INFO L226 Difference]: Without dead ends: 312 [2021-07-13 19:38:09,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1024.7ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:38:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-07-13 19:38:09,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 285. [2021-07-13 19:38:09,347 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) [2021-07-13 19:38:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 636 transitions. [2021-07-13 19:38:09,347 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 636 transitions. Word has length 20 [2021-07-13 19:38:09,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:09,347 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 636 transitions. [2021-07-13 19:38:09,347 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) [2021-07-13 19:38:09,347 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 636 transitions. [2021-07-13 19:38:09,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:09,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:09,348 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:09,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4470 [2021-07-13 19:38:09,548 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:09,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:09,548 INFO L82 PathProgramCache]: Analyzing trace with hash 854508981, now seen corresponding path program 562 times [2021-07-13 19:38:09,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:09,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756749275] [2021-07-13 19:38:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:09,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:09,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756749275] [2021-07-13 19:38:09,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756749275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:09,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072898247] [2021-07-13 19:38:09,740 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 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 [2021-07-13 19:38:09,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:09,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:09,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:09,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:10,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072898247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:10,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:10,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:10,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875994244] [2021-07-13 19:38:10,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:10,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:10,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:10,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:10,182 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) [2021-07-13 19:38:10,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:10,920 INFO L93 Difference]: Finished difference Result 330 states and 713 transitions. [2021-07-13 19:38:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:38:10,920 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 [2021-07-13 19:38:10,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:10,921 INFO L225 Difference]: With dead ends: 330 [2021-07-13 19:38:10,921 INFO L226 Difference]: Without dead ends: 312 [2021-07-13 19:38:10,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 997.2ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:38:10,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-07-13 19:38:10,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-07-13 19:38:10,923 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) [2021-07-13 19:38:10,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-07-13 19:38:10,923 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-07-13 19:38:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:10,923 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-07-13 19:38:10,923 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) [2021-07-13 19:38:10,923 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-07-13 19:38:10,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:10,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:10,924 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:11,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4483 [2021-07-13 19:38:11,124 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:11,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1651244733, now seen corresponding path program 563 times [2021-07-13 19:38:11,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:11,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422186171] [2021-07-13 19:38:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:11,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:11,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422186171] [2021-07-13 19:38:11,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422186171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:11,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861311686] [2021-07-13 19:38:11,290 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 [2021-07-13 19:38:11,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:38:11,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:11,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:11,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:11,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861311686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:11,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:11,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:11,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626799287] [2021-07-13 19:38:11,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:11,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:11,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:11,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:11,647 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) [2021-07-13 19:38:12,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:12,273 INFO L93 Difference]: Finished difference Result 347 states and 744 transitions. [2021-07-13 19:38:12,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:38:12,273 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 [2021-07-13 19:38:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:12,274 INFO L225 Difference]: With dead ends: 347 [2021-07-13 19:38:12,274 INFO L226 Difference]: Without dead ends: 328 [2021-07-13 19:38:12,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 747.0ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:38:12,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-07-13 19:38:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 285. [2021-07-13 19:38:12,276 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) [2021-07-13 19:38:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 636 transitions. [2021-07-13 19:38:12,277 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 636 transitions. Word has length 20 [2021-07-13 19:38:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:12,277 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 636 transitions. [2021-07-13 19:38:12,277 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) [2021-07-13 19:38:12,277 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 636 transitions. [2021-07-13 19:38:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:12,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:12,277 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:12,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4495 [2021-07-13 19:38:12,478 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:12,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:12,478 INFO L82 PathProgramCache]: Analyzing trace with hash 705965373, now seen corresponding path program 564 times [2021-07-13 19:38:12,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:12,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804888300] [2021-07-13 19:38:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:12,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:12,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804888300] [2021-07-13 19:38:12,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804888300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:12,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140539877] [2021-07-13 19:38:12,680 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 [2021-07-13 19:38:12,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:38:12,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:12,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:38:12,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:13,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140539877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:13,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:13,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:13,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714380387] [2021-07-13 19:38:13,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:13,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:13,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:13,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:13,126 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) [2021-07-13 19:38:14,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:14,505 INFO L93 Difference]: Finished difference Result 373 states and 780 transitions. [2021-07-13 19:38:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:38:14,505 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 [2021-07-13 19:38:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:14,506 INFO L225 Difference]: With dead ends: 373 [2021-07-13 19:38:14,506 INFO L226 Difference]: Without dead ends: 350 [2021-07-13 19:38:14,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1578.5ms TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:38:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-07-13 19:38:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 284. [2021-07-13 19:38:14,508 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) [2021-07-13 19:38:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-07-13 19:38:14,508 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-07-13 19:38:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:14,509 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-07-13 19:38:14,509 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) [2021-07-13 19:38:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-07-13 19:38:14,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:14,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:14,509 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:14,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4507,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:14,709 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:14,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:14,710 INFO L82 PathProgramCache]: Analyzing trace with hash -671736063, now seen corresponding path program 565 times [2021-07-13 19:38:14,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:14,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900632458] [2021-07-13 19:38:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:14,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:14,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900632458] [2021-07-13 19:38:14,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900632458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:14,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379556785] [2021-07-13 19:38:14,908 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 [2021-07-13 19:38:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:14,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:14,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:15,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379556785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:15,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:15,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:15,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751744546] [2021-07-13 19:38:15,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:15,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:15,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:15,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:15,285 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) [2021-07-13 19:38:16,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:16,319 INFO L93 Difference]: Finished difference Result 342 states and 726 transitions. [2021-07-13 19:38:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:38:16,319 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 [2021-07-13 19:38:16,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:16,320 INFO L225 Difference]: With dead ends: 342 [2021-07-13 19:38:16,320 INFO L226 Difference]: Without dead ends: 320 [2021-07-13 19:38:16,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1161.0ms TimeCoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:38:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-07-13 19:38:16,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 285. [2021-07-13 19:38:16,322 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) [2021-07-13 19:38:16,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 635 transitions. [2021-07-13 19:38:16,322 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 635 transitions. Word has length 20 [2021-07-13 19:38:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:16,323 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 635 transitions. [2021-07-13 19:38:16,323 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) [2021-07-13 19:38:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 635 transitions. [2021-07-13 19:38:16,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:16,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:16,323 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:16,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4520,566 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:16,523 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:16,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:16,524 INFO L82 PathProgramCache]: Analyzing trace with hash -165389797, now seen corresponding path program 566 times [2021-07-13 19:38:16,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:16,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175913060] [2021-07-13 19:38:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:16,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:16,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175913060] [2021-07-13 19:38:16,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175913060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:16,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651892195] [2021-07-13 19:38:16,728 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 [2021-07-13 19:38:16,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:16,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:16,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:16,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:17,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651892195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:17,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:17,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:17,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620949454] [2021-07-13 19:38:17,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:17,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:17,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:17,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:17,114 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) [2021-07-13 19:38:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:18,215 INFO L93 Difference]: Finished difference Result 351 states and 744 transitions. [2021-07-13 19:38:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:38:18,215 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 [2021-07-13 19:38:18,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:18,216 INFO L225 Difference]: With dead ends: 351 [2021-07-13 19:38:18,216 INFO L226 Difference]: Without dead ends: 329 [2021-07-13 19:38:18,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1209.7ms TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:38:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-07-13 19:38:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 285. [2021-07-13 19:38:18,218 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) [2021-07-13 19:38:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-07-13 19:38:18,218 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-07-13 19:38:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:18,218 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-07-13 19:38:18,219 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) [2021-07-13 19:38:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-07-13 19:38:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:18,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:18,219 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:18,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4532,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:18,429 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:18,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1732995997, now seen corresponding path program 567 times [2021-07-13 19:38:18,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:18,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528557850] [2021-07-13 19:38:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:18,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:18,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528557850] [2021-07-13 19:38:18,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528557850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:18,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458331644] [2021-07-13 19:38:18,616 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 [2021-07-13 19:38:18,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:38:18,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:18,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:18,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:19,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458331644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:19,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:19,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:19,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99555488] [2021-07-13 19:38:19,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:19,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:19,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:19,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:19,067 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) [2021-07-13 19:38:19,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:19,655 INFO L93 Difference]: Finished difference Result 308 states and 677 transitions. [2021-07-13 19:38:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:38:19,656 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 [2021-07-13 19:38:19,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:19,656 INFO L225 Difference]: With dead ends: 308 [2021-07-13 19:38:19,656 INFO L226 Difference]: Without dead ends: 295 [2021-07-13 19:38:19,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 846.6ms TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:38:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-07-13 19:38:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 286. [2021-07-13 19:38:19,658 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) [2021-07-13 19:38:19,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 636 transitions. [2021-07-13 19:38:19,659 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 636 transitions. Word has length 20 [2021-07-13 19:38:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:19,659 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 636 transitions. [2021-07-13 19:38:19,659 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) [2021-07-13 19:38:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 636 transitions. [2021-07-13 19:38:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:19,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:19,659 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:19,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4544,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:19,860 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:19,860 INFO L82 PathProgramCache]: Analyzing trace with hash 984629569, now seen corresponding path program 568 times [2021-07-13 19:38:19,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:19,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235169049] [2021-07-13 19:38:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:20,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:20,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235169049] [2021-07-13 19:38:20,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235169049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:20,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381703071] [2021-07-13 19:38:20,101 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 [2021-07-13 19:38:20,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:20,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:20,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:20,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:20,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381703071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:20,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:20,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:20,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423574782] [2021-07-13 19:38:20,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:20,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:20,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:20,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:20,620 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) [2021-07-13 19:38:21,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:21,403 INFO L93 Difference]: Finished difference Result 327 states and 703 transitions. [2021-07-13 19:38:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:38:21,403 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 [2021-07-13 19:38:21,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:21,404 INFO L225 Difference]: With dead ends: 327 [2021-07-13 19:38:21,404 INFO L226 Difference]: Without dead ends: 309 [2021-07-13 19:38:21,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1079.6ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:38:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-07-13 19:38:21,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 285. [2021-07-13 19:38:21,406 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) [2021-07-13 19:38:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-07-13 19:38:21,406 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-07-13 19:38:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:21,406 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-07-13 19:38:21,406 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) [2021-07-13 19:38:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-07-13 19:38:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:21,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:21,410 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:21,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4556 [2021-07-13 19:38:21,610 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:21,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:21,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1490975835, now seen corresponding path program 569 times [2021-07-13 19:38:21,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:21,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077261842] [2021-07-13 19:38:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:21,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:21,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077261842] [2021-07-13 19:38:21,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077261842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:21,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559192862] [2021-07-13 19:38:21,863 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 [2021-07-13 19:38:21,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:38:21,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:21,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:38:21,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:22,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559192862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:22,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:22,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:22,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101841622] [2021-07-13 19:38:22,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:22,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:22,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:22,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:22,287 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) [2021-07-13 19:38:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:23,294 INFO L93 Difference]: Finished difference Result 337 states and 716 transitions. [2021-07-13 19:38:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:38:23,294 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 [2021-07-13 19:38:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:23,294 INFO L225 Difference]: With dead ends: 337 [2021-07-13 19:38:23,295 INFO L226 Difference]: Without dead ends: 323 [2021-07-13 19:38:23,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1263.2ms TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:38:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-13 19:38:23,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 285. [2021-07-13 19:38:23,297 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) [2021-07-13 19:38:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-07-13 19:38:23,297 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-07-13 19:38:23,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:23,297 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-07-13 19:38:23,298 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) [2021-07-13 19:38:23,298 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-07-13 19:38:23,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:23,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:23,298 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:23,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4568,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:23,498 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:23,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:23,499 INFO L82 PathProgramCache]: Analyzing trace with hash -637109216, now seen corresponding path program 570 times [2021-07-13 19:38:23,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:23,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20739630] [2021-07-13 19:38:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:23,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:23,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20739630] [2021-07-13 19:38:23,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20739630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:23,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389928516] [2021-07-13 19:38:23,613 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 [2021-07-13 19:38:23,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:38:23,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:23,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:38:23,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:23,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389928516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:23,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:23,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 19:38:23,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105342819] [2021-07-13 19:38:23,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:38:23,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:23,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:38:23,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:38:23,869 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) [2021-07-13 19:38:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:24,095 INFO L93 Difference]: Finished difference Result 304 states and 670 transitions. [2021-07-13 19:38:24,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:38:24,096 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 [2021-07-13 19:38:24,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:24,096 INFO L225 Difference]: With dead ends: 304 [2021-07-13 19:38:24,096 INFO L226 Difference]: Without dead ends: 302 [2021-07-13 19:38:24,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:24,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-07-13 19:38:24,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 281. [2021-07-13 19:38:24,099 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) [2021-07-13 19:38:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-07-13 19:38:24,099 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-07-13 19:38:24,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:24,099 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-07-13 19:38:24,099 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) [2021-07-13 19:38:24,099 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-07-13 19:38:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:24,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:24,099 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:24,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4585 [2021-07-13 19:38:24,300 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:24,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:24,300 INFO L82 PathProgramCache]: Analyzing trace with hash -2007255709, now seen corresponding path program 571 times [2021-07-13 19:38:24,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:24,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484265478] [2021-07-13 19:38:24,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:24,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:24,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484265478] [2021-07-13 19:38:24,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484265478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:24,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111300578] [2021-07-13 19:38:24,467 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 [2021-07-13 19:38:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:24,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:24,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:24,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111300578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:24,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:24,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:24,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332557482] [2021-07-13 19:38:24,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:24,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:24,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:24,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:24,820 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) [2021-07-13 19:38:25,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:25,555 INFO L93 Difference]: Finished difference Result 345 states and 740 transitions. [2021-07-13 19:38:25,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:38:25,555 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 [2021-07-13 19:38:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:25,555 INFO L225 Difference]: With dead ends: 345 [2021-07-13 19:38:25,555 INFO L226 Difference]: Without dead ends: 326 [2021-07-13 19:38:25,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 901.2ms TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:38:25,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-13 19:38:25,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2021-07-13 19:38:25,558 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) [2021-07-13 19:38:25,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-07-13 19:38:25,558 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-07-13 19:38:25,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:25,558 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-07-13 19:38:25,558 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) [2021-07-13 19:38:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-07-13 19:38:25,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:25,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:25,559 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:25,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4595 [2021-07-13 19:38:25,759 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:25,759 INFO L82 PathProgramCache]: Analyzing trace with hash 7840897, now seen corresponding path program 572 times [2021-07-13 19:38:25,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:25,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088008267] [2021-07-13 19:38:25,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:25,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:25,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088008267] [2021-07-13 19:38:25,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088008267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:25,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782563899] [2021-07-13 19:38:25,933 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 [2021-07-13 19:38:25,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:25,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:25,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:38:25,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:26,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782563899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:26,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:26,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:26,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797830704] [2021-07-13 19:38:26,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:26,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:26,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:26,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:26,372 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) [2021-07-13 19:38:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:27,019 INFO L93 Difference]: Finished difference Result 336 states and 729 transitions. [2021-07-13 19:38:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:38:27,019 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 [2021-07-13 19:38:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:27,020 INFO L225 Difference]: With dead ends: 336 [2021-07-13 19:38:27,020 INFO L226 Difference]: Without dead ends: 318 [2021-07-13 19:38:27,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 859.5ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:38:27,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-07-13 19:38:27,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 282. [2021-07-13 19:38:27,022 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) [2021-07-13 19:38:27,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 630 transitions. [2021-07-13 19:38:27,023 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 630 transitions. Word has length 20 [2021-07-13 19:38:27,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:27,023 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 630 transitions. [2021-07-13 19:38:27,023 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) [2021-07-13 19:38:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 630 transitions. [2021-07-13 19:38:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:27,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:27,023 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:27,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4607,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:27,224 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:27,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:27,224 INFO L82 PathProgramCache]: Analyzing trace with hash 691347580, now seen corresponding path program 573 times [2021-07-13 19:38:27,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:27,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112529977] [2021-07-13 19:38:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:27,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:27,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112529977] [2021-07-13 19:38:27,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112529977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:27,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771973770] [2021-07-13 19:38:27,336 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 [2021-07-13 19:38:27,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:38:27,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:27,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:38:27,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:27,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771973770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:27,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:27,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:38:27,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507096515] [2021-07-13 19:38:27,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:38:27,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:27,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:38:27,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:38:27,602 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) [2021-07-13 19:38:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:27,855 INFO L93 Difference]: Finished difference Result 298 states and 660 transitions. [2021-07-13 19:38:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:38:27,855 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 [2021-07-13 19:38:27,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:27,855 INFO L225 Difference]: With dead ends: 298 [2021-07-13 19:38:27,855 INFO L226 Difference]: Without dead ends: 298 [2021-07-13 19:38:27,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 402.8ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:27,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-07-13 19:38:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 281. [2021-07-13 19:38:27,858 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) [2021-07-13 19:38:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-07-13 19:38:27,858 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-07-13 19:38:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:27,858 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-07-13 19:38:27,858 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) [2021-07-13 19:38:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-07-13 19:38:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:27,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:27,859 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:28,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4619 [2021-07-13 19:38:28,059 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:28,059 INFO L82 PathProgramCache]: Analyzing trace with hash 804576649, now seen corresponding path program 574 times [2021-07-13 19:38:28,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:28,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766718087] [2021-07-13 19:38:28,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:28,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:28,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766718087] [2021-07-13 19:38:28,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766718087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:28,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779057348] [2021-07-13 19:38:28,228 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 [2021-07-13 19:38:28,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:28,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:28,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:28,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:28,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779057348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:28,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:28,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:28,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273559875] [2021-07-13 19:38:28,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:28,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:28,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:28,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:28,587 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) [2021-07-13 19:38:29,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:29,762 INFO L93 Difference]: Finished difference Result 365 states and 762 transitions. [2021-07-13 19:38:29,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:38:29,762 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 [2021-07-13 19:38:29,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:29,763 INFO L225 Difference]: With dead ends: 365 [2021-07-13 19:38:29,763 INFO L226 Difference]: Without dead ends: 322 [2021-07-13 19:38:29,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1294.8ms TimeCoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:38:29,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-13 19:38:29,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 282. [2021-07-13 19:38:29,765 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) [2021-07-13 19:38:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 629 transitions. [2021-07-13 19:38:29,765 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 629 transitions. Word has length 20 [2021-07-13 19:38:29,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:29,765 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 629 transitions. [2021-07-13 19:38:29,766 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) [2021-07-13 19:38:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 629 transitions. [2021-07-13 19:38:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:29,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:29,766 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:29,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4627,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:29,966 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:29,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:29,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1310922915, now seen corresponding path program 575 times [2021-07-13 19:38:29,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:29,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055162538] [2021-07-13 19:38:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:30,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:30,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055162538] [2021-07-13 19:38:30,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055162538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:30,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415958876] [2021-07-13 19:38:30,128 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 [2021-07-13 19:38:30,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:38:30,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:30,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:38:30,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:30,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415958876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:30,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:30,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:30,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452403402] [2021-07-13 19:38:30,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:30,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:30,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:30,570 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) [2021-07-13 19:38:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:31,314 INFO L93 Difference]: Finished difference Result 351 states and 752 transitions. [2021-07-13 19:38:31,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:38:31,314 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 [2021-07-13 19:38:31,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:31,315 INFO L225 Difference]: With dead ends: 351 [2021-07-13 19:38:31,315 INFO L226 Difference]: Without dead ends: 332 [2021-07-13 19:38:31,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 980.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:38:31,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-13 19:38:31,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 284. [2021-07-13 19:38:31,317 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) [2021-07-13 19:38:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 635 transitions. [2021-07-13 19:38:31,317 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 635 transitions. Word has length 20 [2021-07-13 19:38:31,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:31,317 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 635 transitions. [2021-07-13 19:38:31,318 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) [2021-07-13 19:38:31,318 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 635 transitions. [2021-07-13 19:38:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:31,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:31,318 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:31,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4640 [2021-07-13 19:38:31,518 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:31,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:31,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1275298075, now seen corresponding path program 576 times [2021-07-13 19:38:31,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:31,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351481392] [2021-07-13 19:38:31,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:31,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:31,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351481392] [2021-07-13 19:38:31,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351481392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:31,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399953746] [2021-07-13 19:38:31,707 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 [2021-07-13 19:38:31,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:38:31,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:31,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:38:31,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:32,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399953746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:32,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:32,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:32,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309714095] [2021-07-13 19:38:32,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:32,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:32,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:32,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:32,158 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) [2021-07-13 19:38:32,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:32,778 INFO L93 Difference]: Finished difference Result 330 states and 717 transitions. [2021-07-13 19:38:32,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:38:32,778 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 [2021-07-13 19:38:32,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:32,779 INFO L225 Difference]: With dead ends: 330 [2021-07-13 19:38:32,779 INFO L226 Difference]: Without dead ends: 312 [2021-07-13 19:38:32,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 882.9ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:38:32,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-07-13 19:38:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-07-13 19:38:32,781 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) [2021-07-13 19:38:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 635 transitions. [2021-07-13 19:38:32,782 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 635 transitions. Word has length 20 [2021-07-13 19:38:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:32,782 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 635 transitions. [2021-07-13 19:38:32,782 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) [2021-07-13 19:38:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 635 transitions. [2021-07-13 19:38:32,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:32,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:32,782 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:32,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4652,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:32,982 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:32,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:32,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2072033827, now seen corresponding path program 577 times [2021-07-13 19:38:32,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:32,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160601178] [2021-07-13 19:38:32,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:33,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:33,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160601178] [2021-07-13 19:38:33,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160601178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:33,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182770402] [2021-07-13 19:38:33,188 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 [2021-07-13 19:38:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:33,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:33,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182770402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:33,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:33,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:33,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704742635] [2021-07-13 19:38:33,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:33,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:33,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:33,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:33,544 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) [2021-07-13 19:38:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:34,545 INFO L93 Difference]: Finished difference Result 354 states and 750 transitions. [2021-07-13 19:38:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:38:34,545 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 [2021-07-13 19:38:34,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:34,545 INFO L225 Difference]: With dead ends: 354 [2021-07-13 19:38:34,545 INFO L226 Difference]: Without dead ends: 332 [2021-07-13 19:38:34,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1116.8ms TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:38:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-07-13 19:38:34,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 285. [2021-07-13 19:38:34,548 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) [2021-07-13 19:38:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 637 transitions. [2021-07-13 19:38:34,548 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 637 transitions. Word has length 20 [2021-07-13 19:38:34,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:34,548 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 637 transitions. [2021-07-13 19:38:34,548 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) [2021-07-13 19:38:34,548 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 637 transitions. [2021-07-13 19:38:34,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:34,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:34,549 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:34,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4664,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:34,749 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:34,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:34,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1716587203, now seen corresponding path program 578 times [2021-07-13 19:38:34,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:34,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576647451] [2021-07-13 19:38:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:34,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:34,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576647451] [2021-07-13 19:38:34,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576647451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:34,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255341707] [2021-07-13 19:38:34,926 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 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 [2021-07-13 19:38:34,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:34,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:34,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:38:34,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:35,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255341707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:35,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:35,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:35,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126966837] [2021-07-13 19:38:35,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:35,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:35,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:35,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:35,366 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) [2021-07-13 19:38:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:36,019 INFO L93 Difference]: Finished difference Result 352 states and 756 transitions. [2021-07-13 19:38:36,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:38:36,019 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 [2021-07-13 19:38:36,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:36,020 INFO L225 Difference]: With dead ends: 352 [2021-07-13 19:38:36,020 INFO L226 Difference]: Without dead ends: 333 [2021-07-13 19:38:36,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 884.5ms TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:38:36,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-07-13 19:38:36,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 285. [2021-07-13 19:38:36,022 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) [2021-07-13 19:38:36,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 637 transitions. [2021-07-13 19:38:36,023 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 637 transitions. Word has length 20 [2021-07-13 19:38:36,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:36,023 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 637 transitions. [2021-07-13 19:38:36,023 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) [2021-07-13 19:38:36,023 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 637 transitions. [2021-07-13 19:38:36,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:36,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:36,023 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:36,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4677,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:36,224 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:36,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:36,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1095245155, now seen corresponding path program 579 times [2021-07-13 19:38:36,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:36,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135464566] [2021-07-13 19:38:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:36,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:36,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135464566] [2021-07-13 19:38:36,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135464566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:36,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118166099] [2021-07-13 19:38:36,404 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 [2021-07-13 19:38:36,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:38:36,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:36,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 19:38:36,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:36,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118166099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:36,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:36,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:36,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654744085] [2021-07-13 19:38:36,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:36,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:36,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:36,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:36,877 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) [2021-07-13 19:38:38,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:38,235 INFO L93 Difference]: Finished difference Result 425 states and 870 transitions. [2021-07-13 19:38:38,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:38:38,236 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 [2021-07-13 19:38:38,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:38,236 INFO L225 Difference]: With dead ends: 425 [2021-07-13 19:38:38,236 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 19:38:38,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1577.0ms TimeCoverageRelationStatistics Valid=260, Invalid=1546, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:38:38,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 19:38:38,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 290. [2021-07-13 19:38:38,239 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) [2021-07-13 19:38:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 649 transitions. [2021-07-13 19:38:38,239 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 649 transitions. Word has length 20 [2021-07-13 19:38:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:38,239 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 649 transitions. [2021-07-13 19:38:38,239 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) [2021-07-13 19:38:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 649 transitions. [2021-07-13 19:38:38,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:38,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:38,240 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:38,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4689,580 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:38,440 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:38,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1687729479, now seen corresponding path program 580 times [2021-07-13 19:38:38,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:38,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533731814] [2021-07-13 19:38:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:38,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:38,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533731814] [2021-07-13 19:38:38,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533731814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:38,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163747523] [2021-07-13 19:38:38,623 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 [2021-07-13 19:38:38,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:38,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:38,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:38,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:39,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163747523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:39,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:39,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:38:39,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587219413] [2021-07-13 19:38:39,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:38:39,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:39,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:38:39,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:38:39,078 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) [2021-07-13 19:38:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:39,952 INFO L93 Difference]: Finished difference Result 336 states and 734 transitions. [2021-07-13 19:38:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:38:39,952 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 [2021-07-13 19:38:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:39,952 INFO L225 Difference]: With dead ends: 336 [2021-07-13 19:38:39,952 INFO L226 Difference]: Without dead ends: 329 [2021-07-13 19:38:39,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1102.5ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:38:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-07-13 19:38:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 294. [2021-07-13 19:38:39,955 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) [2021-07-13 19:38:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-07-13 19:38:39,955 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-07-13 19:38:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:39,955 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-07-13 19:38:39,955 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) [2021-07-13 19:38:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-07-13 19:38:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:39,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:39,956 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:40,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4701,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:40,156 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:40,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:40,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1389676521, now seen corresponding path program 581 times [2021-07-13 19:38:40,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:40,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277808310] [2021-07-13 19:38:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:40,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:40,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277808310] [2021-07-13 19:38:40,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277808310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:40,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988612553] [2021-07-13 19:38:40,359 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 [2021-07-13 19:38:40,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:38:40,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:40,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:40,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:40,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988612553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:40,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:40,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:38:40,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476327582] [2021-07-13 19:38:40,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:38:40,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:40,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:38:40,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:38:40,859 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) [2021-07-13 19:38:41,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:41,461 INFO L93 Difference]: Finished difference Result 318 states and 690 transitions. [2021-07-13 19:38:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:38:41,461 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 [2021-07-13 19:38:41,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:41,461 INFO L225 Difference]: With dead ends: 318 [2021-07-13 19:38:41,461 INFO L226 Difference]: Without dead ends: 293 [2021-07-13 19:38:41,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 947.7ms TimeCoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:38:41,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-07-13 19:38:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-07-13 19:38:41,464 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) [2021-07-13 19:38:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-07-13 19:38:41,464 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-07-13 19:38:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:41,464 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-07-13 19:38:41,464 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) [2021-07-13 19:38:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-07-13 19:38:41,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:41,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:41,465 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:41,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4716 [2021-07-13 19:38:41,665 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:41,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:41,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1252337401, now seen corresponding path program 582 times [2021-07-13 19:38:41,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:41,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117392623] [2021-07-13 19:38:41,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:41,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:41,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117392623] [2021-07-13 19:38:41,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117392623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:41,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086101845] [2021-07-13 19:38:41,947 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 [2021-07-13 19:38:41,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:38:41,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:41,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:38:41,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:42,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086101845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:42,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:42,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:38:42,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560430495] [2021-07-13 19:38:42,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:38:42,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:42,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:38:42,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:38:42,487 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) [2021-07-13 19:38:43,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:43,162 INFO L93 Difference]: Finished difference Result 308 states and 677 transitions. [2021-07-13 19:38:43,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:38:43,163 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 [2021-07-13 19:38:43,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:43,163 INFO L225 Difference]: With dead ends: 308 [2021-07-13 19:38:43,163 INFO L226 Difference]: Without dead ends: 295 [2021-07-13 19:38:43,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1138.4ms TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:38:43,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-07-13 19:38:43,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2021-07-13 19:38:43,165 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) [2021-07-13 19:38:43,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-07-13 19:38:43,166 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-07-13 19:38:43,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:43,166 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-07-13 19:38:43,166 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) [2021-07-13 19:38:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-07-13 19:38:43,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:43,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:43,169 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:43,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4728 [2021-07-13 19:38:43,370 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:43,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:43,370 INFO L82 PathProgramCache]: Analyzing trace with hash -325004329, now seen corresponding path program 583 times [2021-07-13 19:38:43,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:43,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592415965] [2021-07-13 19:38:43,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:43,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:43,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592415965] [2021-07-13 19:38:43,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592415965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:43,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776743842] [2021-07-13 19:38:43,658 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 [2021-07-13 19:38:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:43,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:43,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:44,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776743842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:44,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:44,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:38:44,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156473146] [2021-07-13 19:38:44,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:38:44,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:44,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:38:44,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:38:44,154 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) [2021-07-13 19:38:45,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:45,652 INFO L93 Difference]: Finished difference Result 342 states and 735 transitions. [2021-07-13 19:38:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:38:45,653 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 [2021-07-13 19:38:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:45,653 INFO L225 Difference]: With dead ends: 342 [2021-07-13 19:38:45,653 INFO L226 Difference]: Without dead ends: 321 [2021-07-13 19:38:45,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1767.4ms TimeCoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:38:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-13 19:38:45,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 291. [2021-07-13 19:38:45,656 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) [2021-07-13 19:38:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 651 transitions. [2021-07-13 19:38:45,656 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 651 transitions. Word has length 20 [2021-07-13 19:38:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:45,656 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 651 transitions. [2021-07-13 19:38:45,656 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) [2021-07-13 19:38:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 651 transitions. [2021-07-13 19:38:45,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:45,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:45,657 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:45,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4740,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:45,857 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:45,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:45,857 INFO L82 PathProgramCache]: Analyzing trace with hash -122219343, now seen corresponding path program 584 times [2021-07-13 19:38:45,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:45,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946392847] [2021-07-13 19:38:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:46,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:46,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946392847] [2021-07-13 19:38:46,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946392847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:46,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443850819] [2021-07-13 19:38:46,094 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 [2021-07-13 19:38:46,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:46,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:38:46,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:46,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443850819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:46,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:46,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:38:46,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566572530] [2021-07-13 19:38:46,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:38:46,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:46,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:38:46,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:38:46,577 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) [2021-07-13 19:38:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:47,099 INFO L93 Difference]: Finished difference Result 308 states and 676 transitions. [2021-07-13 19:38:47,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:38:47,099 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 [2021-07-13 19:38:47,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:47,099 INFO L225 Difference]: With dead ends: 308 [2021-07-13 19:38:47,100 INFO L226 Difference]: Without dead ends: 293 [2021-07-13 19:38:47,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 926.2ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:38:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-07-13 19:38:47,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-07-13 19:38:47,102 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) [2021-07-13 19:38:47,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-07-13 19:38:47,102 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-07-13 19:38:47,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:47,102 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-07-13 19:38:47,102 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) [2021-07-13 19:38:47,102 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-07-13 19:38:47,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:47,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:47,103 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:47,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4755 [2021-07-13 19:38:47,303 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:47,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:47,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1775172717, now seen corresponding path program 585 times [2021-07-13 19:38:47,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:47,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989170137] [2021-07-13 19:38:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:47,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:47,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989170137] [2021-07-13 19:38:47,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989170137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:47,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389013588] [2021-07-13 19:38:47,481 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 [2021-07-13 19:38:47,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:38:47,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:47,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:47,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389013588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:47,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:47,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:38:47,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067265522] [2021-07-13 19:38:47,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:38:47,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:47,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:38:47,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:38:47,935 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) [2021-07-13 19:38:48,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:48,892 INFO L93 Difference]: Finished difference Result 326 states and 714 transitions. [2021-07-13 19:38:48,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:38:48,892 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 [2021-07-13 19:38:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:48,893 INFO L225 Difference]: With dead ends: 326 [2021-07-13 19:38:48,893 INFO L226 Difference]: Without dead ends: 319 [2021-07-13 19:38:48,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1141.1ms TimeCoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:38:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-07-13 19:38:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 294. [2021-07-13 19:38:48,895 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) [2021-07-13 19:38:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 658 transitions. [2021-07-13 19:38:48,896 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 658 transitions. Word has length 20 [2021-07-13 19:38:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:48,896 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 658 transitions. [2021-07-13 19:38:48,896 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) [2021-07-13 19:38:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 658 transitions. [2021-07-13 19:38:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:48,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:48,896 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:49,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4767,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:49,097 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:49,097 INFO L82 PathProgramCache]: Analyzing trace with hash 942452849, now seen corresponding path program 586 times [2021-07-13 19:38:49,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:49,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852447948] [2021-07-13 19:38:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:49,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:49,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852447948] [2021-07-13 19:38:49,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852447948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:49,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974923975] [2021-07-13 19:38:49,370 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 [2021-07-13 19:38:49,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:49,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:49,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:49,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:49,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974923975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:49,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:49,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:38:49,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616285108] [2021-07-13 19:38:49,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:38:49,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:49,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:38:49,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:38:49,906 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) [2021-07-13 19:38:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:51,053 INFO L93 Difference]: Finished difference Result 347 states and 739 transitions. [2021-07-13 19:38:51,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:38:51,053 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 [2021-07-13 19:38:51,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:51,054 INFO L225 Difference]: With dead ends: 347 [2021-07-13 19:38:51,054 INFO L226 Difference]: Without dead ends: 316 [2021-07-13 19:38:51,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1468.8ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:38:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-13 19:38:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 292. [2021-07-13 19:38:51,056 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) [2021-07-13 19:38:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 653 transitions. [2021-07-13 19:38:51,057 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 653 transitions. Word has length 20 [2021-07-13 19:38:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:51,057 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 653 transitions. [2021-07-13 19:38:51,057 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) [2021-07-13 19:38:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 653 transitions. [2021-07-13 19:38:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:51,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:51,057 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:51,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4782 [2021-07-13 19:38:51,258 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:51,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1036659641, now seen corresponding path program 587 times [2021-07-13 19:38:51,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:51,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794961039] [2021-07-13 19:38:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:51,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:51,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794961039] [2021-07-13 19:38:51,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794961039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:51,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818522030] [2021-07-13 19:38:51,483 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 [2021-07-13 19:38:51,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:38:51,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:51,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:38:51,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:51,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818522030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:51,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:51,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:38:51,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258090239] [2021-07-13 19:38:51,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:38:51,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:51,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:38:51,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:38:51,962 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) [2021-07-13 19:38:52,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:52,469 INFO L93 Difference]: Finished difference Result 309 states and 679 transitions. [2021-07-13 19:38:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:38:52,469 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 [2021-07-13 19:38:52,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:52,470 INFO L225 Difference]: With dead ends: 309 [2021-07-13 19:38:52,470 INFO L226 Difference]: Without dead ends: 296 [2021-07-13 19:38:52,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 868.2ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:38:52,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-13 19:38:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 294. [2021-07-13 19:38:52,472 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) [2021-07-13 19:38:52,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-07-13 19:38:52,472 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-07-13 19:38:52,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:52,473 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-07-13 19:38:52,473 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) [2021-07-13 19:38:52,473 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-07-13 19:38:52,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:52,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:52,473 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:52,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 588 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4794 [2021-07-13 19:38:52,673 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:52,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:52,674 INFO L82 PathProgramCache]: Analyzing trace with hash -540682089, now seen corresponding path program 588 times [2021-07-13 19:38:52,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:52,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178074552] [2021-07-13 19:38:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:52,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:52,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178074552] [2021-07-13 19:38:52,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178074552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:52,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739670611] [2021-07-13 19:38:52,925 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 [2021-07-13 19:38:52,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:38:52,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:52,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:52,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:53,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739670611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:53,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:53,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:38:53,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798712321] [2021-07-13 19:38:53,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:38:53,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:53,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:38:53,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:38:53,371 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) [2021-07-13 19:38:54,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:54,605 INFO L93 Difference]: Finished difference Result 342 states and 735 transitions. [2021-07-13 19:38:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:38:54,606 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 [2021-07-13 19:38:54,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:54,606 INFO L225 Difference]: With dead ends: 342 [2021-07-13 19:38:54,606 INFO L226 Difference]: Without dead ends: 321 [2021-07-13 19:38:54,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1492.5ms TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:38:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-13 19:38:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 293. [2021-07-13 19:38:54,609 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) [2021-07-13 19:38:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-07-13 19:38:54,609 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-07-13 19:38:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:54,609 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-07-13 19:38:54,609 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) [2021-07-13 19:38:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-07-13 19:38:54,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:54,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:54,609 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:54,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4806 [2021-07-13 19:38:54,810 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:54,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:54,810 INFO L82 PathProgramCache]: Analyzing trace with hash -34335823, now seen corresponding path program 589 times [2021-07-13 19:38:54,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:54,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041745204] [2021-07-13 19:38:54,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:55,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:55,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041745204] [2021-07-13 19:38:55,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041745204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:55,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676135134] [2021-07-13 19:38:55,031 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 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 [2021-07-13 19:38:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:55,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:38:55,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:55,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676135134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:55,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:55,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:38:55,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781881214] [2021-07-13 19:38:55,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:38:55,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:55,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:38:55,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:38:55,496 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) [2021-07-13 19:38:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:56,896 INFO L93 Difference]: Finished difference Result 388 states and 813 transitions. [2021-07-13 19:38:56,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:38:56,896 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 [2021-07-13 19:38:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:56,897 INFO L225 Difference]: With dead ends: 388 [2021-07-13 19:38:56,897 INFO L226 Difference]: Without dead ends: 363 [2021-07-13 19:38:56,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1586.0ms TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:38:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-07-13 19:38:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 297. [2021-07-13 19:38:56,899 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) [2021-07-13 19:38:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 668 transitions. [2021-07-13 19:38:56,900 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 668 transitions. Word has length 20 [2021-07-13 19:38:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:56,900 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 668 transitions. [2021-07-13 19:38:56,900 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) [2021-07-13 19:38:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 668 transitions. [2021-07-13 19:38:56,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:56,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:56,900 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:57,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4821 [2021-07-13 19:38:57,101 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:57,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:57,101 INFO L82 PathProgramCache]: Analyzing trace with hash 762399929, now seen corresponding path program 590 times [2021-07-13 19:38:57,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:57,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801239839] [2021-07-13 19:38:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:57,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:57,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801239839] [2021-07-13 19:38:57,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801239839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:57,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160888246] [2021-07-13 19:38:57,300 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 [2021-07-13 19:38:57,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:57,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:57,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:38:57,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:57,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160888246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:57,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:57,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:38:57,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100738963] [2021-07-13 19:38:57,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:38:57,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:38:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:38:57,723 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) [2021-07-13 19:38:58,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:58,430 INFO L93 Difference]: Finished difference Result 364 states and 787 transitions. [2021-07-13 19:38:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:38:58,430 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 [2021-07-13 19:38:58,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:58,431 INFO L225 Difference]: With dead ends: 364 [2021-07-13 19:38:58,431 INFO L226 Difference]: Without dead ends: 345 [2021-07-13 19:38:58,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 838.6ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:38:58,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-13 19:38:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 297. [2021-07-13 19:38:58,433 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) [2021-07-13 19:38:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 668 transitions. [2021-07-13 19:38:58,434 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 668 transitions. Word has length 20 [2021-07-13 19:38:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:58,434 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 668 transitions. [2021-07-13 19:38:58,434 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) [2021-07-13 19:38:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 668 transitions. [2021-07-13 19:38:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:58,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:58,434 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:58,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4833,591 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:58,635 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:58,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:58,635 INFO L82 PathProgramCache]: Analyzing trace with hash 514247511, now seen corresponding path program 591 times [2021-07-13 19:38:58,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:58,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770538862] [2021-07-13 19:38:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:58,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:58,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770538862] [2021-07-13 19:38:58,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770538862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:58,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649385613] [2021-07-13 19:38:58,978 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 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 [2021-07-13 19:38:59,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:38:59,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:59,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:38:59,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:59,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649385613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:59,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:59,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:38:59,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066097149] [2021-07-13 19:38:59,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:38:59,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:59,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:38:59,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:59,388 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) [2021-07-13 19:38:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:59,784 INFO L93 Difference]: Finished difference Result 315 states and 695 transitions. [2021-07-13 19:38:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:38:59,784 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 [2021-07-13 19:38:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:59,785 INFO L225 Difference]: With dead ends: 315 [2021-07-13 19:38:59,785 INFO L226 Difference]: Without dead ends: 300 [2021-07-13 19:38:59,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 830.2ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:38:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-13 19:38:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-07-13 19:38:59,787 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) [2021-07-13 19:38:59,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 674 transitions. [2021-07-13 19:38:59,788 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 674 transitions. Word has length 20 [2021-07-13 19:38:59,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:59,788 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 674 transitions. [2021-07-13 19:38:59,788 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) [2021-07-13 19:38:59,788 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 674 transitions. [2021-07-13 19:38:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:38:59,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:59,788 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:00,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4845 [2021-07-13 19:39:00,005 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:00,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:00,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1138705863, now seen corresponding path program 592 times [2021-07-13 19:39:00,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:00,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268052486] [2021-07-13 19:39:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:00,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:00,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268052486] [2021-07-13 19:39:00,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268052486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:00,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275889958] [2021-07-13 19:39:00,267 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 [2021-07-13 19:39:00,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:00,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:00,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:39:00,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:00,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275889958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:00,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:00,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:00,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828323815] [2021-07-13 19:39:00,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:00,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:00,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:00,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:00,720 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) [2021-07-13 19:39:01,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:01,352 INFO L93 Difference]: Finished difference Result 325 states and 711 transitions. [2021-07-13 19:39:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:39:01,352 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 [2021-07-13 19:39:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:01,353 INFO L225 Difference]: With dead ends: 325 [2021-07-13 19:39:01,353 INFO L226 Difference]: Without dead ends: 318 [2021-07-13 19:39:01,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 973.6ms TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:39:01,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-07-13 19:39:01,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 301. [2021-07-13 19:39:01,355 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) [2021-07-13 19:39:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 677 transitions. [2021-07-13 19:39:01,356 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 677 transitions. Word has length 20 [2021-07-13 19:39:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:01,356 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 677 transitions. [2021-07-13 19:39:01,356 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) [2021-07-13 19:39:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 677 transitions. [2021-07-13 19:39:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:01,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:01,356 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:01,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4859,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:01,572 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:01,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1578919703, now seen corresponding path program 593 times [2021-07-13 19:39:01,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:01,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552561953] [2021-07-13 19:39:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:01,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:01,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552561953] [2021-07-13 19:39:01,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552561953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:01,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578921125] [2021-07-13 19:39:01,874 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 [2021-07-13 19:39:01,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:01,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:01,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:39:01,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:02,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578921125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:02,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:02,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:02,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495167591] [2021-07-13 19:39:02,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:02,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:02,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:02,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:02,321 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) [2021-07-13 19:39:03,457 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2021-07-13 19:39:03,733 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2021-07-13 19:39:03,910 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2021-07-13 19:39:04,418 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-07-13 19:39:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:04,740 INFO L93 Difference]: Finished difference Result 380 states and 812 transitions. [2021-07-13 19:39:04,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:39:04,740 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 [2021-07-13 19:39:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:04,741 INFO L225 Difference]: With dead ends: 380 [2021-07-13 19:39:04,741 INFO L226 Difference]: Without dead ends: 356 [2021-07-13 19:39:04,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 2651.4ms TimeCoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:39:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-07-13 19:39:04,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 303. [2021-07-13 19:39:04,747 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) [2021-07-13 19:39:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 682 transitions. [2021-07-13 19:39:04,747 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 682 transitions. Word has length 20 [2021-07-13 19:39:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:04,747 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 682 transitions. [2021-07-13 19:39:04,747 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) [2021-07-13 19:39:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 682 transitions. [2021-07-13 19:39:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:04,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:04,747 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:04,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4874,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:04,948 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:04,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1381456263, now seen corresponding path program 594 times [2021-07-13 19:39:04,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:04,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806174832] [2021-07-13 19:39:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:05,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:05,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806174832] [2021-07-13 19:39:05,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806174832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:05,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34515558] [2021-07-13 19:39:05,162 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 [2021-07-13 19:39:05,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:05,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:05,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:39:05,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:05,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34515558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:05,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:05,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:05,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492937415] [2021-07-13 19:39:05,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:05,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:05,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:05,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:05,660 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) [2021-07-13 19:39:06,252 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-07-13 19:39:06,556 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-07-13 19:39:06,839 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-07-13 19:39:07,420 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-07-13 19:39:07,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:07,501 INFO L93 Difference]: Finished difference Result 384 states and 824 transitions. [2021-07-13 19:39:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:39:07,501 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 [2021-07-13 19:39:07,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:07,502 INFO L225 Difference]: With dead ends: 384 [2021-07-13 19:39:07,502 INFO L226 Difference]: Without dead ends: 365 [2021-07-13 19:39:07,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2073.6ms TimeCoverageRelationStatistics Valid=248, Invalid=1558, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:39:07,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-07-13 19:39:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 299. [2021-07-13 19:39:07,504 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) [2021-07-13 19:39:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 672 transitions. [2021-07-13 19:39:07,505 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 672 transitions. Word has length 20 [2021-07-13 19:39:07,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:07,505 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 672 transitions. [2021-07-13 19:39:07,505 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) [2021-07-13 19:39:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 672 transitions. [2021-07-13 19:39:07,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:07,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:07,505 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:07,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4889 [2021-07-13 19:39:07,706 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:07,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:07,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1673126495, now seen corresponding path program 595 times [2021-07-13 19:39:07,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:07,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069203351] [2021-07-13 19:39:07,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:07,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:07,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069203351] [2021-07-13 19:39:07,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069203351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:07,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807519670] [2021-07-13 19:39:07,946 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 [2021-07-13 19:39:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:07,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:39:07,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:08,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807519670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:08,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:08,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:08,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601293307] [2021-07-13 19:39:08,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:08,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:08,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:08,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:08,389 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) [2021-07-13 19:39:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:08,803 INFO L93 Difference]: Finished difference Result 314 states and 694 transitions. [2021-07-13 19:39:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:39:08,804 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 [2021-07-13 19:39:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:08,804 INFO L225 Difference]: With dead ends: 314 [2021-07-13 19:39:08,804 INFO L226 Difference]: Without dead ends: 301 [2021-07-13 19:39:08,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 810.8ms TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:39:08,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-07-13 19:39:08,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2021-07-13 19:39:08,806 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) [2021-07-13 19:39:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 676 transitions. [2021-07-13 19:39:08,807 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 676 transitions. Word has length 20 [2021-07-13 19:39:08,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:08,807 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 676 transitions. [2021-07-13 19:39:08,807 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) [2021-07-13 19:39:08,807 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 676 transitions. [2021-07-13 19:39:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:08,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:08,807 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:09,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4902,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:09,008 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:09,008 INFO L82 PathProgramCache]: Analyzing trace with hash 95784765, now seen corresponding path program 596 times [2021-07-13 19:39:09,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:09,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027120362] [2021-07-13 19:39:09,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:09,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:09,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027120362] [2021-07-13 19:39:09,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027120362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:09,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033070688] [2021-07-13 19:39:09,226 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 [2021-07-13 19:39:09,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:09,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:09,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:39:09,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:09,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033070688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:09,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:09,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:09,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971965114] [2021-07-13 19:39:09,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:09,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:09,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:09,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:09,703 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) [2021-07-13 19:39:10,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:10,367 INFO L93 Difference]: Finished difference Result 327 states and 717 transitions. [2021-07-13 19:39:10,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:39:10,368 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 [2021-07-13 19:39:10,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:10,368 INFO L225 Difference]: With dead ends: 327 [2021-07-13 19:39:10,368 INFO L226 Difference]: Without dead ends: 316 [2021-07-13 19:39:10,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 995.2ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:39:10,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-13 19:39:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 302. [2021-07-13 19:39:10,371 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) [2021-07-13 19:39:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 678 transitions. [2021-07-13 19:39:10,371 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 678 transitions. Word has length 20 [2021-07-13 19:39:10,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:10,371 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 678 transitions. [2021-07-13 19:39:10,371 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) [2021-07-13 19:39:10,371 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 678 transitions. [2021-07-13 19:39:10,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:10,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:10,371 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:10,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4914 [2021-07-13 19:39:10,572 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:10,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:10,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1430376095, now seen corresponding path program 597 times [2021-07-13 19:39:10,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:10,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937931417] [2021-07-13 19:39:10,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:10,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937931417] [2021-07-13 19:39:10,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937931417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762805301] [2021-07-13 19:39:10,744 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 [2021-07-13 19:39:10,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:39:10,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:10,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:39:10,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:11,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762805301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:11,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:11,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:11,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487560353] [2021-07-13 19:39:11,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:11,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:11,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:11,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:11,144 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) [2021-07-13 19:39:12,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:12,254 INFO L93 Difference]: Finished difference Result 373 states and 802 transitions. [2021-07-13 19:39:12,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:39:12,254 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 [2021-07-13 19:39:12,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:12,255 INFO L225 Difference]: With dead ends: 373 [2021-07-13 19:39:12,255 INFO L226 Difference]: Without dead ends: 354 [2021-07-13 19:39:12,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1281.5ms TimeCoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:39:12,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-13 19:39:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 303. [2021-07-13 19:39:12,257 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) [2021-07-13 19:39:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 680 transitions. [2021-07-13 19:39:12,258 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 680 transitions. Word has length 20 [2021-07-13 19:39:12,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:12,258 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 680 transitions. [2021-07-13 19:39:12,258 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) [2021-07-13 19:39:12,258 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 680 transitions. [2021-07-13 19:39:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:12,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:12,258 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:12,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4926,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:12,459 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:12,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:12,459 INFO L82 PathProgramCache]: Analyzing trace with hash 602131031, now seen corresponding path program 598 times [2021-07-13 19:39:12,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:12,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759276581] [2021-07-13 19:39:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:12,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:12,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759276581] [2021-07-13 19:39:12,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759276581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:12,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030345138] [2021-07-13 19:39:12,689 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 [2021-07-13 19:39:12,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:12,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:12,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:39:12,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:13,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030345138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:13,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:13,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:13,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263159786] [2021-07-13 19:39:13,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:13,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:13,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:13,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:13,126 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) [2021-07-13 19:39:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:13,837 INFO L93 Difference]: Finished difference Result 356 states and 766 transitions. [2021-07-13 19:39:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:39:13,838 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 [2021-07-13 19:39:13,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:13,838 INFO L225 Difference]: With dead ends: 356 [2021-07-13 19:39:13,838 INFO L226 Difference]: Without dead ends: 338 [2021-07-13 19:39:13,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1009.0ms TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:39:13,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-07-13 19:39:13,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 305. [2021-07-13 19:39:13,841 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) [2021-07-13 19:39:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 684 transitions. [2021-07-13 19:39:13,841 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 684 transitions. Word has length 20 [2021-07-13 19:39:13,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:13,841 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 684 transitions. [2021-07-13 19:39:13,841 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) [2021-07-13 19:39:13,842 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 684 transitions. [2021-07-13 19:39:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:13,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:13,842 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:14,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4938 [2021-07-13 19:39:14,042 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:14,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1936722361, now seen corresponding path program 599 times [2021-07-13 19:39:14,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:14,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015982600] [2021-07-13 19:39:14,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:14,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:14,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015982600] [2021-07-13 19:39:14,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015982600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:14,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413612911] [2021-07-13 19:39:14,251 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 [2021-07-13 19:39:14,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:39:14,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:14,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:39:14,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:14,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413612911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:14,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:14,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:14,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543738923] [2021-07-13 19:39:14,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:14,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:14,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:14,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:14,688 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) [2021-07-13 19:39:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:15,488 INFO L93 Difference]: Finished difference Result 374 states and 801 transitions. [2021-07-13 19:39:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:39:15,488 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 [2021-07-13 19:39:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:15,489 INFO L225 Difference]: With dead ends: 374 [2021-07-13 19:39:15,489 INFO L226 Difference]: Without dead ends: 355 [2021-07-13 19:39:15,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1049.1ms TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:39:15,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-07-13 19:39:15,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 306. [2021-07-13 19:39:15,491 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) [2021-07-13 19:39:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 686 transitions. [2021-07-13 19:39:15,492 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 686 transitions. Word has length 20 [2021-07-13 19:39:15,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:15,492 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 686 transitions. [2021-07-13 19:39:15,492 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) [2021-07-13 19:39:15,492 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 686 transitions. [2021-07-13 19:39:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:15,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:15,492 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:15,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4950,600 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:15,693 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1398866783, now seen corresponding path program 600 times [2021-07-13 19:39:15,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:15,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296244897] [2021-07-13 19:39:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:15,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:15,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296244897] [2021-07-13 19:39:15,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296244897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:15,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27771454] [2021-07-13 19:39:15,877 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 [2021-07-13 19:39:15,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:39:15,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:15,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:39:15,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:16,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27771454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:16,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:16,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:16,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664751578] [2021-07-13 19:39:16,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:16,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:16,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:16,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:16,238 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) [2021-07-13 19:39:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:16,842 INFO L93 Difference]: Finished difference Result 369 states and 798 transitions. [2021-07-13 19:39:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:39:16,843 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 [2021-07-13 19:39:16,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:16,843 INFO L225 Difference]: With dead ends: 369 [2021-07-13 19:39:16,843 INFO L226 Difference]: Without dead ends: 350 [2021-07-13 19:39:16,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 729.3ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:39:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-07-13 19:39:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 306. [2021-07-13 19:39:16,846 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) [2021-07-13 19:39:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 686 transitions. [2021-07-13 19:39:16,846 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 686 transitions. Word has length 20 [2021-07-13 19:39:16,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:16,846 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 686 transitions. [2021-07-13 19:39:16,846 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) [2021-07-13 19:39:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 686 transitions. [2021-07-13 19:39:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:16,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:16,847 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:17,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4963,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:17,047 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:17,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1354383623, now seen corresponding path program 601 times [2021-07-13 19:39:17,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:17,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695902554] [2021-07-13 19:39:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:17,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:17,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695902554] [2021-07-13 19:39:17,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695902554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:17,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089254048] [2021-07-13 19:39:17,250 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 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 [2021-07-13 19:39:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:17,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:39:17,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:17,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089254048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:17,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:17,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:17,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342878842] [2021-07-13 19:39:17,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:17,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:17,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:17,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:17,712 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) [2021-07-13 19:39:18,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:18,054 INFO L93 Difference]: Finished difference Result 322 states and 710 transitions. [2021-07-13 19:39:18,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:39:18,054 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 [2021-07-13 19:39:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:18,055 INFO L225 Difference]: With dead ends: 322 [2021-07-13 19:39:18,055 INFO L226 Difference]: Without dead ends: 309 [2021-07-13 19:39:18,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 658.6ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:39:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-07-13 19:39:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2021-07-13 19:39:18,057 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) [2021-07-13 19:39:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 692 transitions. [2021-07-13 19:39:18,057 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 692 transitions. Word has length 20 [2021-07-13 19:39:18,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:18,057 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 692 transitions. [2021-07-13 19:39:18,058 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) [2021-07-13 19:39:18,058 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 692 transitions. [2021-07-13 19:39:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:18,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:18,058 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:18,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4975,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:18,258 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:18,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1363241943, now seen corresponding path program 602 times [2021-07-13 19:39:18,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:18,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678006539] [2021-07-13 19:39:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:18,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:18,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678006539] [2021-07-13 19:39:18,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678006539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:18,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618243569] [2021-07-13 19:39:18,478 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 [2021-07-13 19:39:18,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:18,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:18,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:39:18,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:18,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618243569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:18,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:18,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:18,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227629679] [2021-07-13 19:39:18,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:18,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:18,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:18,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:18,968 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) [2021-07-13 19:39:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:19,711 INFO L93 Difference]: Finished difference Result 337 states and 737 transitions. [2021-07-13 19:39:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:39:19,711 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 [2021-07-13 19:39:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:19,712 INFO L225 Difference]: With dead ends: 337 [2021-07-13 19:39:19,712 INFO L226 Difference]: Without dead ends: 326 [2021-07-13 19:39:19,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1020.5ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:39:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-13 19:39:19,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 310. [2021-07-13 19:39:19,714 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) [2021-07-13 19:39:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 694 transitions. [2021-07-13 19:39:19,715 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 694 transitions. Word has length 20 [2021-07-13 19:39:19,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:19,715 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 694 transitions. [2021-07-13 19:39:19,715 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) [2021-07-13 19:39:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 694 transitions. [2021-07-13 19:39:19,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:19,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:19,715 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:19,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4987 [2021-07-13 19:39:19,916 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:19,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1597134023, now seen corresponding path program 603 times [2021-07-13 19:39:19,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:19,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390582153] [2021-07-13 19:39:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:20,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:20,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390582153] [2021-07-13 19:39:20,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390582153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:20,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855653559] [2021-07-13 19:39:20,132 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 [2021-07-13 19:39:20,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:39:20,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:20,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:39:20,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:20,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855653559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:20,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:20,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:20,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800547983] [2021-07-13 19:39:20,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:20,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:20,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:20,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:20,573 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) [2021-07-13 19:39:21,398 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-07-13 19:39:21,617 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-07-13 19:39:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:21,897 INFO L93 Difference]: Finished difference Result 406 states and 855 transitions. [2021-07-13 19:39:21,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:39:21,897 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 [2021-07-13 19:39:21,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:21,897 INFO L225 Difference]: With dead ends: 406 [2021-07-13 19:39:21,898 INFO L226 Difference]: Without dead ends: 380 [2021-07-13 19:39:21,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1500.0ms TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:39:21,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-07-13 19:39:21,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 308. [2021-07-13 19:39:21,900 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) [2021-07-13 19:39:21,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 690 transitions. [2021-07-13 19:39:21,901 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 690 transitions. Word has length 20 [2021-07-13 19:39:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:21,901 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 690 transitions. [2021-07-13 19:39:21,901 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) [2021-07-13 19:39:21,901 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 690 transitions. [2021-07-13 19:39:21,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:21,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:21,901 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:22,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4999,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:22,102 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:22,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:22,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1869588209, now seen corresponding path program 604 times [2021-07-13 19:39:22,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:22,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758546556] [2021-07-13 19:39:22,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:22,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:22,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758546556] [2021-07-13 19:39:22,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758546556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:22,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443626015] [2021-07-13 19:39:22,328 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 [2021-07-13 19:39:22,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:22,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:22,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:39:22,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:22,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443626015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:22,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:22,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:22,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069830821] [2021-07-13 19:39:22,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:22,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:22,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:22,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:22,825 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) [2021-07-13 19:39:24,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:24,361 INFO L93 Difference]: Finished difference Result 393 states and 830 transitions. [2021-07-13 19:39:24,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:39:24,362 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 [2021-07-13 19:39:24,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:24,362 INFO L225 Difference]: With dead ends: 393 [2021-07-13 19:39:24,362 INFO L226 Difference]: Without dead ends: 372 [2021-07-13 19:39:24,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1803.9ms TimeCoverageRelationStatistics Valid=211, Invalid=1681, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:39:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-07-13 19:39:24,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 310. [2021-07-13 19:39:24,365 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) [2021-07-13 19:39:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 695 transitions. [2021-07-13 19:39:24,365 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 695 transitions. Word has length 20 [2021-07-13 19:39:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:24,365 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 695 transitions. [2021-07-13 19:39:24,365 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) [2021-07-13 19:39:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 695 transitions. [2021-07-13 19:39:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:24,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:24,366 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:24,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5014 [2021-07-13 19:39:24,566 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:24,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:24,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1628643335, now seen corresponding path program 605 times [2021-07-13 19:39:24,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:24,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141484177] [2021-07-13 19:39:24,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:24,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:24,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141484177] [2021-07-13 19:39:24,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141484177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:24,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617753280] [2021-07-13 19:39:24,749 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 [2021-07-13 19:39:24,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:39:24,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:24,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:39:24,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:25,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617753280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:25,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:25,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:25,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930299084] [2021-07-13 19:39:25,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:25,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:25,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:25,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:25,098 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) [2021-07-13 19:39:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:25,774 INFO L93 Difference]: Finished difference Result 373 states and 807 transitions. [2021-07-13 19:39:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:39:25,774 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 [2021-07-13 19:39:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:25,775 INFO L225 Difference]: With dead ends: 373 [2021-07-13 19:39:25,775 INFO L226 Difference]: Without dead ends: 354 [2021-07-13 19:39:25,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 775.9ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:39:25,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-13 19:39:25,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 310. [2021-07-13 19:39:25,777 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) [2021-07-13 19:39:25,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 695 transitions. [2021-07-13 19:39:25,778 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 695 transitions. Word has length 20 [2021-07-13 19:39:25,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:25,778 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 695 transitions. [2021-07-13 19:39:25,778 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) [2021-07-13 19:39:25,778 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 695 transitions. [2021-07-13 19:39:25,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:25,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:25,778 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:25,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5028,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:25,979 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:25,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:25,979 INFO L82 PathProgramCache]: Analyzing trace with hash 386453271, now seen corresponding path program 606 times [2021-07-13 19:39:25,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:25,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407915857] [2021-07-13 19:39:25,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:26,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:26,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407915857] [2021-07-13 19:39:26,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407915857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:26,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476486159] [2021-07-13 19:39:26,231 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 [2021-07-13 19:39:26,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:39:26,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:26,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:39:26,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:26,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476486159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:26,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:26,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:26,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176009676] [2021-07-13 19:39:26,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:26,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:26,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:26,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:26,682 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) [2021-07-13 19:39:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:27,443 INFO L93 Difference]: Finished difference Result 357 states and 778 transitions. [2021-07-13 19:39:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:39:27,443 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 [2021-07-13 19:39:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:27,443 INFO L225 Difference]: With dead ends: 357 [2021-07-13 19:39:27,444 INFO L226 Difference]: Without dead ends: 339 [2021-07-13 19:39:27,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1043.0ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:39:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-13 19:39:27,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 313. [2021-07-13 19:39:27,446 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) [2021-07-13 19:39:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 701 transitions. [2021-07-13 19:39:27,446 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 701 transitions. Word has length 20 [2021-07-13 19:39:27,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:27,447 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 701 transitions. [2021-07-13 19:39:27,447 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) [2021-07-13 19:39:27,447 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 701 transitions. [2021-07-13 19:39:27,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:27,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:27,447 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:27,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5041 [2021-07-13 19:39:27,647 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:27,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:27,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1721044601, now seen corresponding path program 607 times [2021-07-13 19:39:27,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:27,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288813457] [2021-07-13 19:39:27,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:27,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:27,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288813457] [2021-07-13 19:39:27,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288813457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:27,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032826390] [2021-07-13 19:39:27,830 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 [2021-07-13 19:39:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:27,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:39:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:28,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032826390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:28,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:28,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:28,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451244270] [2021-07-13 19:39:28,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:28,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:28,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:28,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:28,349 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) [2021-07-13 19:39:29,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:29,562 INFO L93 Difference]: Finished difference Result 383 states and 817 transitions. [2021-07-13 19:39:29,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:39:29,562 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 [2021-07-13 19:39:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:29,562 INFO L225 Difference]: With dead ends: 383 [2021-07-13 19:39:29,562 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 19:39:29,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1458.6ms TimeCoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:39:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 19:39:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 314. [2021-07-13 19:39:29,565 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) [2021-07-13 19:39:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-07-13 19:39:29,565 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-07-13 19:39:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:29,565 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-07-13 19:39:29,565 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) [2021-07-13 19:39:29,565 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-07-13 19:39:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:29,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:29,566 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:29,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5053 [2021-07-13 19:39:29,766 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:29,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:29,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1183189023, now seen corresponding path program 608 times [2021-07-13 19:39:29,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:29,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591562807] [2021-07-13 19:39:29,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:29,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:29,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591562807] [2021-07-13 19:39:29,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591562807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:29,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498671287] [2021-07-13 19:39:29,943 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 [2021-07-13 19:39:29,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:29,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:29,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:39:29,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:30,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498671287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:30,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:30,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:30,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194362196] [2021-07-13 19:39:30,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:30,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:30,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:30,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:30,342 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) [2021-07-13 19:39:31,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:31,303 INFO L93 Difference]: Finished difference Result 398 states and 841 transitions. [2021-07-13 19:39:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:39:31,303 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 [2021-07-13 19:39:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:31,304 INFO L225 Difference]: With dead ends: 398 [2021-07-13 19:39:31,304 INFO L226 Difference]: Without dead ends: 376 [2021-07-13 19:39:31,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1151.3ms TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:39:31,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-13 19:39:31,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 314. [2021-07-13 19:39:31,306 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) [2021-07-13 19:39:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-07-13 19:39:31,307 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-07-13 19:39:31,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:31,307 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-07-13 19:39:31,307 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) [2021-07-13 19:39:31,307 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-07-13 19:39:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:31,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:31,307 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:31,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5063 [2021-07-13 19:39:31,508 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:31,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:31,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1689535289, now seen corresponding path program 609 times [2021-07-13 19:39:31,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:31,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752273278] [2021-07-13 19:39:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:31,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:31,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752273278] [2021-07-13 19:39:31,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752273278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:31,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615672323] [2021-07-13 19:39:31,683 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 [2021-07-13 19:39:31,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:39:31,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:31,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 19:39:31,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:32,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615672323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:32,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:32,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:32,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146914075] [2021-07-13 19:39:32,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:32,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:32,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:32,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:32,129 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) [2021-07-13 19:39:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:32,745 INFO L93 Difference]: Finished difference Result 382 states and 826 transitions. [2021-07-13 19:39:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:39:32,746 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 [2021-07-13 19:39:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:32,746 INFO L225 Difference]: With dead ends: 382 [2021-07-13 19:39:32,746 INFO L226 Difference]: Without dead ends: 363 [2021-07-13 19:39:32,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 823.3ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:39:32,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-07-13 19:39:32,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 314. [2021-07-13 19:39:32,749 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) [2021-07-13 19:39:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-07-13 19:39:32,749 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-07-13 19:39:32,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:32,749 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-07-13 19:39:32,749 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) [2021-07-13 19:39:32,749 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-07-13 19:39:32,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:32,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:32,749 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:32,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5075,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:32,950 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:32,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1230116495, now seen corresponding path program 610 times [2021-07-13 19:39:32,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:32,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033009637] [2021-07-13 19:39:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:33,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:33,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033009637] [2021-07-13 19:39:33,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033009637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:33,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071348183] [2021-07-13 19:39:33,198 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 [2021-07-13 19:39:33,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:33,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:33,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:39:33,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:33,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071348183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:33,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:33,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:33,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238580903] [2021-07-13 19:39:33,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:33,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:33,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:33,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:33,672 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) [2021-07-13 19:39:34,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:34,039 INFO L93 Difference]: Finished difference Result 330 states and 727 transitions. [2021-07-13 19:39:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:39:34,040 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 [2021-07-13 19:39:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:34,040 INFO L225 Difference]: With dead ends: 330 [2021-07-13 19:39:34,040 INFO L226 Difference]: Without dead ends: 315 [2021-07-13 19:39:34,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 787.2ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:39:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-13 19:39:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-07-13 19:39:34,042 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) [2021-07-13 19:39:34,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 706 transitions. [2021-07-13 19:39:34,043 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 706 transitions. Word has length 20 [2021-07-13 19:39:34,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:34,043 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 706 transitions. [2021-07-13 19:39:34,043 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) [2021-07-13 19:39:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 706 transitions. [2021-07-13 19:39:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:34,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:34,043 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:34,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5088 [2021-07-13 19:39:34,244 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:34,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:34,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1411897427, now seen corresponding path program 611 times [2021-07-13 19:39:34,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:34,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891759111] [2021-07-13 19:39:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:34,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:34,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891759111] [2021-07-13 19:39:34,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891759111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:34,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483832551] [2021-07-13 19:39:34,467 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 [2021-07-13 19:39:34,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:39:34,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:34,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:39:34,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:34,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483832551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:34,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:34,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:34,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111856365] [2021-07-13 19:39:34,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:34,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:34,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:34,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:34,956 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) [2021-07-13 19:39:35,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:35,315 INFO L93 Difference]: Finished difference Result 329 states and 726 transitions. [2021-07-13 19:39:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:39:35,315 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 [2021-07-13 19:39:35,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:35,315 INFO L225 Difference]: With dead ends: 329 [2021-07-13 19:39:35,315 INFO L226 Difference]: Without dead ends: 316 [2021-07-13 19:39:35,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 747.4ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:39:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-07-13 19:39:35,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-07-13 19:39:35,318 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) [2021-07-13 19:39:35,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 708 transitions. [2021-07-13 19:39:35,318 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 708 transitions. Word has length 20 [2021-07-13 19:39:35,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:35,318 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 708 transitions. [2021-07-13 19:39:35,318 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) [2021-07-13 19:39:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 708 transitions. [2021-07-13 19:39:35,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:35,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:35,319 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:35,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5100 [2021-07-13 19:39:35,533 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:35,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:35,533 INFO L82 PathProgramCache]: Analyzing trace with hash -165444303, now seen corresponding path program 612 times [2021-07-13 19:39:35,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:35,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515208499] [2021-07-13 19:39:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:35,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:35,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515208499] [2021-07-13 19:39:35,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515208499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:35,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849358385] [2021-07-13 19:39:35,803 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 [2021-07-13 19:39:35,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:39:35,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:35,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:39:35,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:36,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849358385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:36,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:36,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:36,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101250688] [2021-07-13 19:39:36,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:36,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:36,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:36,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:36,321 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) [2021-07-13 19:39:36,995 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-07-13 19:39:37,209 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-07-13 19:39:37,361 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2021-07-13 19:39:37,609 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2021-07-13 19:39:37,876 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-07-13 19:39:38,020 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-07-13 19:39:38,143 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-07-13 19:39:38,347 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2021-07-13 19:39:38,554 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-07-13 19:39:38,749 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-07-13 19:39:38,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:38,792 INFO L93 Difference]: Finished difference Result 404 states and 851 transitions. [2021-07-13 19:39:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:39:38,792 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 [2021-07-13 19:39:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:38,793 INFO L225 Difference]: With dead ends: 404 [2021-07-13 19:39:38,793 INFO L226 Difference]: Without dead ends: 379 [2021-07-13 19:39:38,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 2753.2ms TimeCoverageRelationStatistics Valid=298, Invalid=1864, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:39:38,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-13 19:39:38,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 314. [2021-07-13 19:39:38,796 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) [2021-07-13 19:39:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-07-13 19:39:38,796 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-07-13 19:39:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:38,796 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-07-13 19:39:38,796 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) [2021-07-13 19:39:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-07-13 19:39:38,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:38,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:38,797 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:38,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5112 [2021-07-13 19:39:38,997 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:38,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:38,997 INFO L82 PathProgramCache]: Analyzing trace with hash -71237511, now seen corresponding path program 613 times [2021-07-13 19:39:38,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:38,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375801776] [2021-07-13 19:39:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:39,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:39,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375801776] [2021-07-13 19:39:39,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375801776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:39,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940468048] [2021-07-13 19:39:39,207 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 [2021-07-13 19:39:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:39,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:39:39,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:39,558 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-07-13 19:39:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:39,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940468048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:39,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:39,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:39,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543951083] [2021-07-13 19:39:39,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:39,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:39,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:39,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:39,725 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) [2021-07-13 19:39:40,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:40,148 INFO L93 Difference]: Finished difference Result 330 states and 728 transitions. [2021-07-13 19:39:40,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:39:40,148 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 [2021-07-13 19:39:40,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:40,149 INFO L225 Difference]: With dead ends: 330 [2021-07-13 19:39:40,149 INFO L226 Difference]: Without dead ends: 317 [2021-07-13 19:39:40,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 829.7ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:39:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-13 19:39:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 316. [2021-07-13 19:39:40,151 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) [2021-07-13 19:39:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 708 transitions. [2021-07-13 19:39:40,152 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 708 transitions. Word has length 20 [2021-07-13 19:39:40,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:40,152 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 708 transitions. [2021-07-13 19:39:40,152 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) [2021-07-13 19:39:40,152 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 708 transitions. [2021-07-13 19:39:40,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:40,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:40,152 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:40,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5124,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:40,352 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:40,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1648579241, now seen corresponding path program 614 times [2021-07-13 19:39:40,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:40,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182034331] [2021-07-13 19:39:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:40,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:40,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182034331] [2021-07-13 19:39:40,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182034331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:40,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335979236] [2021-07-13 19:39:40,587 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 [2021-07-13 19:39:40,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:40,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:40,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:39:40,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:41,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335979236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:41,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:41,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:41,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588687942] [2021-07-13 19:39:41,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:41,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:41,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:41,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:41,068 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) [2021-07-13 19:39:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:42,263 INFO L93 Difference]: Finished difference Result 381 states and 826 transitions. [2021-07-13 19:39:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:39:42,263 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 [2021-07-13 19:39:42,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:42,264 INFO L225 Difference]: With dead ends: 381 [2021-07-13 19:39:42,264 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 19:39:42,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1459.2ms TimeCoverageRelationStatistics Valid=203, Invalid=1279, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:39:42,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 19:39:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 318. [2021-07-13 19:39:42,266 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) [2021-07-13 19:39:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 714 transitions. [2021-07-13 19:39:42,267 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 714 transitions. Word has length 20 [2021-07-13 19:39:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:42,267 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 714 transitions. [2021-07-13 19:39:42,267 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) [2021-07-13 19:39:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 714 transitions. [2021-07-13 19:39:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:42,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:42,267 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:42,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5135 [2021-07-13 19:39:42,468 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:42,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:42,468 INFO L82 PathProgramCache]: Analyzing trace with hash -313987911, now seen corresponding path program 615 times [2021-07-13 19:39:42,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:42,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491036461] [2021-07-13 19:39:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:42,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:42,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491036461] [2021-07-13 19:39:42,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491036461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:42,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995215801] [2021-07-13 19:39:42,706 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 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 [2021-07-13 19:39:42,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:39:42,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:42,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:39:42,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:43,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995215801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:43,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:43,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:43,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185603025] [2021-07-13 19:39:43,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:43,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:43,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:43,100 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) [2021-07-13 19:39:44,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:44,462 INFO L93 Difference]: Finished difference Result 384 states and 823 transitions. [2021-07-13 19:39:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:39:44,462 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 [2021-07-13 19:39:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:44,462 INFO L225 Difference]: With dead ends: 384 [2021-07-13 19:39:44,462 INFO L226 Difference]: Without dead ends: 352 [2021-07-13 19:39:44,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1547.5ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:39:44,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-07-13 19:39:44,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 322. [2021-07-13 19:39:44,465 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) [2021-07-13 19:39:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 725 transitions. [2021-07-13 19:39:44,465 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 725 transitions. Word has length 20 [2021-07-13 19:39:44,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:44,465 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 725 transitions. [2021-07-13 19:39:44,465 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) [2021-07-13 19:39:44,466 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 725 transitions. [2021-07-13 19:39:44,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:44,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:44,466 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:44,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5147,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:44,666 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:44,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:44,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1142232975, now seen corresponding path program 616 times [2021-07-13 19:39:44,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:44,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766885846] [2021-07-13 19:39:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:44,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:44,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766885846] [2021-07-13 19:39:44,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766885846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:44,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013709786] [2021-07-13 19:39:44,861 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 [2021-07-13 19:39:44,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:44,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:44,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:39:44,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:45,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013709786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:45,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:45,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:45,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582299656] [2021-07-13 19:39:45,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:45,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:45,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:45,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:45,303 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) [2021-07-13 19:39:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:46,138 INFO L93 Difference]: Finished difference Result 376 states and 818 transitions. [2021-07-13 19:39:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:39:46,139 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 [2021-07-13 19:39:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:46,139 INFO L225 Difference]: With dead ends: 376 [2021-07-13 19:39:46,139 INFO L226 Difference]: Without dead ends: 351 [2021-07-13 19:39:46,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1082.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:39:46,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-07-13 19:39:46,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-07-13 19:39:46,142 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) [2021-07-13 19:39:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 727 transitions. [2021-07-13 19:39:46,142 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 727 transitions. Word has length 20 [2021-07-13 19:39:46,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:46,142 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 727 transitions. [2021-07-13 19:39:46,142 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) [2021-07-13 19:39:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 727 transitions. [2021-07-13 19:39:46,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:46,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:46,143 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:46,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5159,617 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:46,343 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:46,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:46,343 INFO L82 PathProgramCache]: Analyzing trace with hash -345497223, now seen corresponding path program 617 times [2021-07-13 19:39:46,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:46,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094501198] [2021-07-13 19:39:46,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:46,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:46,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094501198] [2021-07-13 19:39:46,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094501198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:46,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635877624] [2021-07-13 19:39:46,549 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 [2021-07-13 19:39:46,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:39:46,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:46,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:39:46,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:46,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635877624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:46,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:46,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:46,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863845016] [2021-07-13 19:39:46,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:46,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:46,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:46,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:46,900 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) [2021-07-13 19:39:47,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:47,712 INFO L93 Difference]: Finished difference Result 393 states and 843 transitions. [2021-07-13 19:39:47,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:39:47,712 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 [2021-07-13 19:39:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:47,713 INFO L225 Difference]: With dead ends: 393 [2021-07-13 19:39:47,713 INFO L226 Difference]: Without dead ends: 371 [2021-07-13 19:39:47,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 948.7ms TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:39:47,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-07-13 19:39:47,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 322. [2021-07-13 19:39:47,715 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) [2021-07-13 19:39:47,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 725 transitions. [2021-07-13 19:39:47,716 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 725 transitions. Word has length 20 [2021-07-13 19:39:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:47,716 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 725 transitions. [2021-07-13 19:39:47,716 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) [2021-07-13 19:39:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 725 transitions. [2021-07-13 19:39:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:47,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:47,716 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:47,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5171,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:47,917 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1196219667, now seen corresponding path program 618 times [2021-07-13 19:39:47,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:47,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748504976] [2021-07-13 19:39:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:48,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:48,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748504976] [2021-07-13 19:39:48,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748504976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:48,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727520536] [2021-07-13 19:39:48,132 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 [2021-07-13 19:39:48,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:48,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:39:48,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:48,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727520536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:48,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:48,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:48,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758138706] [2021-07-13 19:39:48,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:48,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:48,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:48,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:48,589 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) [2021-07-13 19:39:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:48,903 INFO L93 Difference]: Finished difference Result 338 states and 749 transitions. [2021-07-13 19:39:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:39:48,903 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 [2021-07-13 19:39:48,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:48,904 INFO L225 Difference]: With dead ends: 338 [2021-07-13 19:39:48,904 INFO L226 Difference]: Without dead ends: 325 [2021-07-13 19:39:48,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 694.5ms TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:39:48,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-07-13 19:39:48,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-07-13 19:39:48,906 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) [2021-07-13 19:39:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 731 transitions. [2021-07-13 19:39:48,907 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 731 transitions. Word has length 20 [2021-07-13 19:39:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:48,907 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 731 transitions. [2021-07-13 19:39:48,907 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) [2021-07-13 19:39:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 731 transitions. [2021-07-13 19:39:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:48,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:48,907 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:49,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5183 [2021-07-13 19:39:49,108 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash -381122063, now seen corresponding path program 619 times [2021-07-13 19:39:49,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:49,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295581300] [2021-07-13 19:39:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:49,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:49,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295581300] [2021-07-13 19:39:49,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295581300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:49,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175322722] [2021-07-13 19:39:49,319 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 [2021-07-13 19:39:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:49,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:39:49,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:49,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175322722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:49,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:49,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:49,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947707167] [2021-07-13 19:39:49,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:49,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:49,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:49,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:49,784 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) [2021-07-13 19:39:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:51,071 INFO L93 Difference]: Finished difference Result 415 states and 880 transitions. [2021-07-13 19:39:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:39:51,072 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 [2021-07-13 19:39:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:51,072 INFO L225 Difference]: With dead ends: 415 [2021-07-13 19:39:51,072 INFO L226 Difference]: Without dead ends: 390 [2021-07-13 19:39:51,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1558.4ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:39:51,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-13 19:39:51,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 325. [2021-07-13 19:39:51,075 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) [2021-07-13 19:39:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 731 transitions. [2021-07-13 19:39:51,075 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 731 transitions. Word has length 20 [2021-07-13 19:39:51,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:51,075 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 731 transitions. [2021-07-13 19:39:51,075 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) [2021-07-13 19:39:51,075 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 731 transitions. [2021-07-13 19:39:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:51,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:51,078 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:51,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5195,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:51,279 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:51,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:51,279 INFO L82 PathProgramCache]: Analyzing trace with hash 125224203, now seen corresponding path program 620 times [2021-07-13 19:39:51,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:51,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204093578] [2021-07-13 19:39:51,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:51,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:51,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204093578] [2021-07-13 19:39:51,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204093578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:51,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691538798] [2021-07-13 19:39:51,503 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 [2021-07-13 19:39:51,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:51,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:51,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:39:51,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:51,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691538798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:51,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:51,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:51,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578927839] [2021-07-13 19:39:51,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:51,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:51,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:51,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:51,966 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) [2021-07-13 19:39:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:52,743 INFO L93 Difference]: Finished difference Result 378 states and 811 transitions. [2021-07-13 19:39:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:39:52,743 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 [2021-07-13 19:39:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:52,744 INFO L225 Difference]: With dead ends: 378 [2021-07-13 19:39:52,744 INFO L226 Difference]: Without dead ends: 346 [2021-07-13 19:39:52,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1083.1ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:39:52,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-13 19:39:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 326. [2021-07-13 19:39:52,746 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) [2021-07-13 19:39:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 733 transitions. [2021-07-13 19:39:52,746 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 733 transitions. Word has length 20 [2021-07-13 19:39:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:52,747 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 733 transitions. [2021-07-13 19:39:52,747 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) [2021-07-13 19:39:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 733 transitions. [2021-07-13 19:39:52,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:52,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:52,747 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:52,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5207,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:52,947 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:52,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:52,948 INFO L82 PathProgramCache]: Analyzing trace with hash 921959955, now seen corresponding path program 621 times [2021-07-13 19:39:52,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:52,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235495533] [2021-07-13 19:39:52,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:53,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:53,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235495533] [2021-07-13 19:39:53,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235495533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:53,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373442251] [2021-07-13 19:39:53,124 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 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 [2021-07-13 19:39:53,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:39:53,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:53,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 19:39:53,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:53,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373442251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:53,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:53,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:53,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288963775] [2021-07-13 19:39:53,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:53,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:53,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:53,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:53,483 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) [2021-07-13 19:39:54,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:54,432 INFO L93 Difference]: Finished difference Result 414 states and 889 transitions. [2021-07-13 19:39:54,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:39:54,433 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 [2021-07-13 19:39:54,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:54,433 INFO L225 Difference]: With dead ends: 414 [2021-07-13 19:39:54,433 INFO L226 Difference]: Without dead ends: 400 [2021-07-13 19:39:54,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1067.7ms TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:39:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-13 19:39:54,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 328. [2021-07-13 19:39:54,436 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) [2021-07-13 19:39:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 740 transitions. [2021-07-13 19:39:54,436 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 740 transitions. Word has length 20 [2021-07-13 19:39:54,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:54,437 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 740 transitions. [2021-07-13 19:39:54,437 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) [2021-07-13 19:39:54,437 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 740 transitions. [2021-07-13 19:39:54,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:54,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:54,437 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:54,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5219,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:54,637 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:54,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1357910735, now seen corresponding path program 622 times [2021-07-13 19:39:54,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:54,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732897938] [2021-07-13 19:39:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:54,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:54,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732897938] [2021-07-13 19:39:54,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732897938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:54,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382378499] [2021-07-13 19:39:54,821 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 [2021-07-13 19:39:54,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:54,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:54,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:39:54,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:55,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382378499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:55,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:55,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:55,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138613676] [2021-07-13 19:39:55,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:55,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:55,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:55,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:55,234 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) [2021-07-13 19:39:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:56,302 INFO L93 Difference]: Finished difference Result 380 states and 831 transitions. [2021-07-13 19:39:56,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:39:56,303 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 [2021-07-13 19:39:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:56,303 INFO L225 Difference]: With dead ends: 380 [2021-07-13 19:39:56,303 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 19:39:56,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1225.5ms TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:39:56,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 19:39:56,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 330. [2021-07-13 19:39:56,306 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) [2021-07-13 19:39:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-07-13 19:39:56,306 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-07-13 19:39:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:56,306 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-07-13 19:39:56,306 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) [2021-07-13 19:39:56,306 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-07-13 19:39:56,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:56,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:56,306 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:56,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5231 [2021-07-13 19:39:56,507 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:56,507 INFO L82 PathProgramCache]: Analyzing trace with hash -561174983, now seen corresponding path program 623 times [2021-07-13 19:39:56,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:56,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624036772] [2021-07-13 19:39:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:56,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:56,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624036772] [2021-07-13 19:39:56,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624036772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:56,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821061824] [2021-07-13 19:39:56,708 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 [2021-07-13 19:39:56,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:39:56,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:56,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:39:56,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:57,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821061824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:57,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:57,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:57,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066065752] [2021-07-13 19:39:57,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:57,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:57,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:57,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:57,202 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) [2021-07-13 19:39:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:58,392 INFO L93 Difference]: Finished difference Result 412 states and 877 transitions. [2021-07-13 19:39:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:39:58,392 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 [2021-07-13 19:39:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:58,392 INFO L225 Difference]: With dead ends: 412 [2021-07-13 19:39:58,392 INFO L226 Difference]: Without dead ends: 390 [2021-07-13 19:39:58,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1448.6ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:39:58,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-13 19:39:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 330. [2021-07-13 19:39:58,395 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) [2021-07-13 19:39:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-07-13 19:39:58,396 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-07-13 19:39:58,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:58,396 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-07-13 19:39:58,396 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) [2021-07-13 19:39:58,396 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-07-13 19:39:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:58,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:58,396 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:58,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5246,624 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:58,596 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:58,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:58,597 INFO L82 PathProgramCache]: Analyzing trace with hash -54828717, now seen corresponding path program 624 times [2021-07-13 19:39:58,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:58,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645524904] [2021-07-13 19:39:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:58,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:58,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645524904] [2021-07-13 19:39:58,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645524904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:58,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624483210] [2021-07-13 19:39:58,760 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 [2021-07-13 19:39:58,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:39:58,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:58,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:39:58,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:59,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624483210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:59,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:59,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:39:59,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920293855] [2021-07-13 19:39:59,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:39:59,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:59,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:39:59,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:59,174 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) [2021-07-13 19:39:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:59,743 INFO L93 Difference]: Finished difference Result 397 states and 864 transitions. [2021-07-13 19:39:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:39:59,743 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 [2021-07-13 19:39:59,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:59,744 INFO L225 Difference]: With dead ends: 397 [2021-07-13 19:39:59,744 INFO L226 Difference]: Without dead ends: 378 [2021-07-13 19:39:59,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 737.0ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:39:59,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-13 19:39:59,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 330. [2021-07-13 19:39:59,746 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) [2021-07-13 19:39:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-07-13 19:39:59,747 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-07-13 19:39:59,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:59,747 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-07-13 19:39:59,747 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) [2021-07-13 19:39:59,747 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-07-13 19:39:59,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:39:59,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:59,747 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:59,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5259,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:59,947 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:59,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:59,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1832686521, now seen corresponding path program 625 times [2021-07-13 19:39:59,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:59,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916620394] [2021-07-13 19:39:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:00,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:00,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916620394] [2021-07-13 19:40:00,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916620394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:00,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699885382] [2021-07-13 19:40:00,195 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 [2021-07-13 19:40:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:00,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:00,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:00,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699885382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:00,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:00,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:00,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170015016] [2021-07-13 19:40:00,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:00,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:00,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:00,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:00,744 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) [2021-07-13 19:40:01,248 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-07-13 19:40:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:01,425 INFO L93 Difference]: Finished difference Result 355 states and 781 transitions. [2021-07-13 19:40:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:40:01,425 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 [2021-07-13 19:40:01,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:01,426 INFO L225 Difference]: With dead ends: 355 [2021-07-13 19:40:01,426 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 19:40:01,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1124.3ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:40:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 19:40:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 331. [2021-07-13 19:40:01,428 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) [2021-07-13 19:40:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 747 transitions. [2021-07-13 19:40:01,429 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 747 transitions. Word has length 20 [2021-07-13 19:40:01,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:01,429 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 747 transitions. [2021-07-13 19:40:01,429 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) [2021-07-13 19:40:01,429 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 747 transitions. [2021-07-13 19:40:01,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:01,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:01,429 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:01,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5271 [2021-07-13 19:40:01,630 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:01,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:01,630 INFO L82 PathProgramCache]: Analyzing trace with hash 255344791, now seen corresponding path program 626 times [2021-07-13 19:40:01,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:01,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804286824] [2021-07-13 19:40:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:01,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:01,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804286824] [2021-07-13 19:40:01,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804286824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:01,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810788324] [2021-07-13 19:40:01,870 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 [2021-07-13 19:40:01,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:01,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:01,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:01,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:02,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810788324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:02,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:02,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:02,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290649549] [2021-07-13 19:40:02,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:02,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:02,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:02,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:02,363 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) [2021-07-13 19:40:03,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:03,363 INFO L93 Difference]: Finished difference Result 382 states and 824 transitions. [2021-07-13 19:40:03,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:40:03,363 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 [2021-07-13 19:40:03,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:03,364 INFO L225 Difference]: With dead ends: 382 [2021-07-13 19:40:03,364 INFO L226 Difference]: Without dead ends: 351 [2021-07-13 19:40:03,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1292.5ms TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:40:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-07-13 19:40:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 330. [2021-07-13 19:40:03,367 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) [2021-07-13 19:40:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-07-13 19:40:03,367 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-07-13 19:40:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:03,367 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-07-13 19:40:03,367 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) [2021-07-13 19:40:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-07-13 19:40:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:03,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:03,368 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:03,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5285,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:03,568 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:03,568 INFO L82 PathProgramCache]: Analyzing trace with hash 761691057, now seen corresponding path program 627 times [2021-07-13 19:40:03,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:03,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587315833] [2021-07-13 19:40:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:03,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:03,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587315833] [2021-07-13 19:40:03,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587315833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:03,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679769140] [2021-07-13 19:40:03,814 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 [2021-07-13 19:40:03,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:40:03,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:03,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:40:03,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:04,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679769140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:04,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:04,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:04,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594048772] [2021-07-13 19:40:04,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:04,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:04,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:04,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:04,221 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) [2021-07-13 19:40:05,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:05,413 INFO L93 Difference]: Finished difference Result 392 states and 842 transitions. [2021-07-13 19:40:05,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:40:05,413 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 [2021-07-13 19:40:05,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:05,414 INFO L225 Difference]: With dead ends: 392 [2021-07-13 19:40:05,414 INFO L226 Difference]: Without dead ends: 371 [2021-07-13 19:40:05,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1417.0ms TimeCoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:40:05,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-07-13 19:40:05,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 330. [2021-07-13 19:40:05,417 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) [2021-07-13 19:40:05,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-07-13 19:40:05,417 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-07-13 19:40:05,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:05,417 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-07-13 19:40:05,417 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) [2021-07-13 19:40:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-07-13 19:40:05,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:05,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:05,418 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:05,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5297 [2021-07-13 19:40:05,618 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:05,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:05,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1366393994, now seen corresponding path program 628 times [2021-07-13 19:40:05,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:05,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76390561] [2021-07-13 19:40:05,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:40:05,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:05,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76390561] [2021-07-13 19:40:05,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76390561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:05,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357668367] [2021-07-13 19:40:05,729 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 [2021-07-13 19:40:05,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:05,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:05,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:05,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:40:05,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357668367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:05,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:05,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 19:40:05,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906416325] [2021-07-13 19:40:05,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:40:05,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:05,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:40:05,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:40:05,971 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) [2021-07-13 19:40:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:06,386 INFO L93 Difference]: Finished difference Result 383 states and 848 transitions. [2021-07-13 19:40:06,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:40:06,387 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 [2021-07-13 19:40:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:06,387 INFO L225 Difference]: With dead ends: 383 [2021-07-13 19:40:06,387 INFO L226 Difference]: Without dead ends: 381 [2021-07-13 19:40:06,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 569.4ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:40:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-13 19:40:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 330. [2021-07-13 19:40:06,390 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) [2021-07-13 19:40:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 743 transitions. [2021-07-13 19:40:06,390 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 743 transitions. Word has length 20 [2021-07-13 19:40:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:06,390 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 743 transitions. [2021-07-13 19:40:06,390 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) [2021-07-13 19:40:06,391 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 743 transitions. [2021-07-13 19:40:06,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:06,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:06,391 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:06,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5312,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:06,591 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:06,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:06,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1558426809, now seen corresponding path program 629 times [2021-07-13 19:40:06,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:06,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673244512] [2021-07-13 19:40:06,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:06,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:06,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673244512] [2021-07-13 19:40:06,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673244512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:06,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944600621] [2021-07-13 19:40:06,777 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 [2021-07-13 19:40:06,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:40:06,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:06,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:06,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:07,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944600621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:07,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:07,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:07,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024308131] [2021-07-13 19:40:07,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:07,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:07,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:07,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:07,200 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) [2021-07-13 19:40:08,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:08,167 INFO L93 Difference]: Finished difference Result 412 states and 885 transitions. [2021-07-13 19:40:08,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:40:08,168 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 [2021-07-13 19:40:08,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:08,168 INFO L225 Difference]: With dead ends: 412 [2021-07-13 19:40:08,168 INFO L226 Difference]: Without dead ends: 393 [2021-07-13 19:40:08,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1183.5ms TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:40:08,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-07-13 19:40:08,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 335. [2021-07-13 19:40:08,171 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) [2021-07-13 19:40:08,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 754 transitions. [2021-07-13 19:40:08,171 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 754 transitions. Word has length 20 [2021-07-13 19:40:08,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:08,171 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 754 transitions. [2021-07-13 19:40:08,171 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) [2021-07-13 19:40:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 754 transitions. [2021-07-13 19:40:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:08,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:08,172 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:08,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 630 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5321 [2021-07-13 19:40:08,372 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:08,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:08,372 INFO L82 PathProgramCache]: Analyzing trace with hash -721443881, now seen corresponding path program 630 times [2021-07-13 19:40:08,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:08,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040411784] [2021-07-13 19:40:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:08,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:08,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040411784] [2021-07-13 19:40:08,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040411784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:08,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953818515] [2021-07-13 19:40:08,600 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 [2021-07-13 19:40:08,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:08,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:08,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:08,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:08,933 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 19:40:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:09,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953818515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:09,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:09,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:09,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346971768] [2021-07-13 19:40:09,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:09,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:09,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:09,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:09,050 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) [2021-07-13 19:40:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:09,742 INFO L93 Difference]: Finished difference Result 382 states and 828 transitions. [2021-07-13 19:40:09,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:40:09,742 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 [2021-07-13 19:40:09,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:09,743 INFO L225 Difference]: With dead ends: 382 [2021-07-13 19:40:09,743 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 19:40:09,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1010.6ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:40:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 19:40:09,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 337. [2021-07-13 19:40:09,745 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) [2021-07-13 19:40:09,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-07-13 19:40:09,746 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-07-13 19:40:09,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:09,746 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-07-13 19:40:09,746 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) [2021-07-13 19:40:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-07-13 19:40:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:09,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:09,746 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:09,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5333 [2021-07-13 19:40:09,947 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:09,947 INFO L82 PathProgramCache]: Analyzing trace with hash 75291871, now seen corresponding path program 631 times [2021-07-13 19:40:09,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:09,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16925665] [2021-07-13 19:40:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:10,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:10,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16925665] [2021-07-13 19:40:10,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16925665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:10,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299189632] [2021-07-13 19:40:10,117 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 [2021-07-13 19:40:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:10,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:10,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:10,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299189632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:10,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:10,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:10,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087305579] [2021-07-13 19:40:10,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:10,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:10,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:10,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:10,510 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) [2021-07-13 19:40:11,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:11,090 INFO L93 Difference]: Finished difference Result 397 states and 864 transitions. [2021-07-13 19:40:11,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:40:11,091 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 [2021-07-13 19:40:11,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:11,091 INFO L225 Difference]: With dead ends: 397 [2021-07-13 19:40:11,091 INFO L226 Difference]: Without dead ends: 378 [2021-07-13 19:40:11,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 829.4ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:40:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-13 19:40:11,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 337. [2021-07-13 19:40:11,094 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) [2021-07-13 19:40:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-07-13 19:40:11,094 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-07-13 19:40:11,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:11,094 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-07-13 19:40:11,094 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) [2021-07-13 19:40:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-07-13 19:40:11,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:11,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:11,095 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:11,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5345,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:11,295 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:11,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:11,295 INFO L82 PathProgramCache]: Analyzing trace with hash 581638137, now seen corresponding path program 632 times [2021-07-13 19:40:11,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:11,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658000903] [2021-07-13 19:40:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:11,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:11,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658000903] [2021-07-13 19:40:11,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658000903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:11,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064666958] [2021-07-13 19:40:11,506 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 [2021-07-13 19:40:11,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:11,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:11,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:11,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:11,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064666958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:11,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:11,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:11,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821513004] [2021-07-13 19:40:11,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:11,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:11,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:11,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:11,943 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) [2021-07-13 19:40:12,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:12,605 INFO L93 Difference]: Finished difference Result 404 states and 878 transitions. [2021-07-13 19:40:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:40:12,605 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 [2021-07-13 19:40:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:12,606 INFO L225 Difference]: With dead ends: 404 [2021-07-13 19:40:12,606 INFO L226 Difference]: Without dead ends: 385 [2021-07-13 19:40:12,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 898.6ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:40:12,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-07-13 19:40:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 337. [2021-07-13 19:40:12,608 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) [2021-07-13 19:40:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-07-13 19:40:12,609 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-07-13 19:40:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:12,609 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-07-13 19:40:12,609 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) [2021-07-13 19:40:12,609 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-07-13 19:40:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:12,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:12,609 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:12,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5357,633 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:12,810 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:12,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:12,810 INFO L82 PathProgramCache]: Analyzing trace with hash 546013297, now seen corresponding path program 633 times [2021-07-13 19:40:12,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:12,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010532393] [2021-07-13 19:40:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:12,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:12,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010532393] [2021-07-13 19:40:12,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010532393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:12,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537382789] [2021-07-13 19:40:12,997 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 [2021-07-13 19:40:13,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:13,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:13,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 19:40:13,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:13,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537382789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:13,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:13,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:13,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179169540] [2021-07-13 19:40:13,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:13,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:13,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:13,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:13,376 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) [2021-07-13 19:40:14,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:14,161 INFO L93 Difference]: Finished difference Result 391 states and 851 transitions. [2021-07-13 19:40:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:40:14,161 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 [2021-07-13 19:40:14,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:14,161 INFO L225 Difference]: With dead ends: 391 [2021-07-13 19:40:14,161 INFO L226 Difference]: Without dead ends: 366 [2021-07-13 19:40:14,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 976.8ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:40:14,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-13 19:40:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 340. [2021-07-13 19:40:14,164 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) [2021-07-13 19:40:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 764 transitions. [2021-07-13 19:40:14,165 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 764 transitions. Word has length 20 [2021-07-13 19:40:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:14,165 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 764 transitions. [2021-07-13 19:40:14,165 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) [2021-07-13 19:40:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 764 transitions. [2021-07-13 19:40:14,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:14,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:14,165 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:14,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5369,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:14,373 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:14,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:14,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1342749049, now seen corresponding path program 634 times [2021-07-13 19:40:14,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:14,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558526780] [2021-07-13 19:40:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:14,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:14,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558526780] [2021-07-13 19:40:14,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558526780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:14,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671596567] [2021-07-13 19:40:14,549 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 [2021-07-13 19:40:14,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:14,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:14,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:14,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:14,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671596567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:14,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:14,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:14,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537517039] [2021-07-13 19:40:14,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:14,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:14,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:14,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:14,956 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) [2021-07-13 19:40:15,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:15,567 INFO L93 Difference]: Finished difference Result 400 states and 870 transitions. [2021-07-13 19:40:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:40:15,567 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 [2021-07-13 19:40:15,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:15,567 INFO L225 Difference]: With dead ends: 400 [2021-07-13 19:40:15,567 INFO L226 Difference]: Without dead ends: 381 [2021-07-13 19:40:15,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 793.5ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:40:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-13 19:40:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 339. [2021-07-13 19:40:15,570 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) [2021-07-13 19:40:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 762 transitions. [2021-07-13 19:40:15,571 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 762 transitions. Word has length 20 [2021-07-13 19:40:15,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:15,571 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 762 transitions. [2021-07-13 19:40:15,571 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) [2021-07-13 19:40:15,571 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 762 transitions. [2021-07-13 19:40:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:15,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:15,571 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:15,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5383,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:15,772 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:15,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1849095315, now seen corresponding path program 635 times [2021-07-13 19:40:15,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:15,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998762957] [2021-07-13 19:40:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:15,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:15,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998762957] [2021-07-13 19:40:15,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998762957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:15,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122550816] [2021-07-13 19:40:15,961 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 [2021-07-13 19:40:15,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:40:15,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:15,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:15,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:16,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122550816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:16,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:16,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:16,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495312084] [2021-07-13 19:40:16,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:16,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:16,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:16,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:16,405 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) [2021-07-13 19:40:17,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:17,070 INFO L93 Difference]: Finished difference Result 404 states and 878 transitions. [2021-07-13 19:40:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:40:17,071 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 [2021-07-13 19:40:17,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:17,071 INFO L225 Difference]: With dead ends: 404 [2021-07-13 19:40:17,071 INFO L226 Difference]: Without dead ends: 385 [2021-07-13 19:40:17,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 877.0ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:40:17,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-07-13 19:40:17,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 338. [2021-07-13 19:40:17,074 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) [2021-07-13 19:40:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 760 transitions. [2021-07-13 19:40:17,075 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 760 transitions. Word has length 20 [2021-07-13 19:40:17,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:17,075 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 760 transitions. [2021-07-13 19:40:17,075 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) [2021-07-13 19:40:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 760 transitions. [2021-07-13 19:40:17,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:17,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:17,075 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:17,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5395 [2021-07-13 19:40:17,275 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:17,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:17,276 INFO L82 PathProgramCache]: Analyzing trace with hash 365960377, now seen corresponding path program 636 times [2021-07-13 19:40:17,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:17,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527286364] [2021-07-13 19:40:17,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:17,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:17,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527286364] [2021-07-13 19:40:17,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527286364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:17,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595368303] [2021-07-13 19:40:17,474 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 [2021-07-13 19:40:17,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:40:17,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:17,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:40:17,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:17,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595368303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:17,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:17,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:17,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975741001] [2021-07-13 19:40:17,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:17,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:17,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:17,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:17,942 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) [2021-07-13 19:40:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:18,507 INFO L93 Difference]: Finished difference Result 408 states and 886 transitions. [2021-07-13 19:40:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:40:18,507 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 [2021-07-13 19:40:18,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:18,508 INFO L225 Difference]: With dead ends: 408 [2021-07-13 19:40:18,508 INFO L226 Difference]: Without dead ends: 389 [2021-07-13 19:40:18,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 816.4ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:40:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-13 19:40:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 339. [2021-07-13 19:40:18,510 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) [2021-07-13 19:40:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 763 transitions. [2021-07-13 19:40:18,511 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 763 transitions. Word has length 20 [2021-07-13 19:40:18,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:18,511 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 763 transitions. [2021-07-13 19:40:18,511 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) [2021-07-13 19:40:18,511 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 763 transitions. [2021-07-13 19:40:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:18,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:18,511 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:18,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5407,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:18,712 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:18,712 INFO L82 PathProgramCache]: Analyzing trace with hash 529174167, now seen corresponding path program 637 times [2021-07-13 19:40:18,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:18,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432643200] [2021-07-13 19:40:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:19,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:19,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432643200] [2021-07-13 19:40:19,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432643200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:19,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629868137] [2021-07-13 19:40:19,068 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 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 [2021-07-13 19:40:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:19,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:40:19,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:19,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629868137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:19,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:19,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:19,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574924870] [2021-07-13 19:40:19,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:19,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:19,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:19,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:19,542 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) [2021-07-13 19:40:19,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:19,930 INFO L93 Difference]: Finished difference Result 360 states and 795 transitions. [2021-07-13 19:40:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:40:19,931 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 [2021-07-13 19:40:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:19,931 INFO L225 Difference]: With dead ends: 360 [2021-07-13 19:40:19,931 INFO L226 Difference]: Without dead ends: 345 [2021-07-13 19:40:19,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 907.0ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:40:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-13 19:40:19,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2021-07-13 19:40:19,934 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) [2021-07-13 19:40:19,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 769 transitions. [2021-07-13 19:40:19,934 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 769 transitions. Word has length 20 [2021-07-13 19:40:19,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:19,934 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 769 transitions. [2021-07-13 19:40:19,934 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) [2021-07-13 19:40:19,934 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 769 transitions. [2021-07-13 19:40:19,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:19,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:19,935 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:20,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5419 [2021-07-13 19:40:20,135 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:20,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:20,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1123779207, now seen corresponding path program 638 times [2021-07-13 19:40:20,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:20,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171327291] [2021-07-13 19:40:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:20,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:20,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171327291] [2021-07-13 19:40:20,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171327291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:20,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748894932] [2021-07-13 19:40:20,371 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 [2021-07-13 19:40:20,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:20,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:20,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:40:20,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:20,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748894932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:20,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:20,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:20,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839174268] [2021-07-13 19:40:20,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:20,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:20,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:20,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:20,818 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) [2021-07-13 19:40:21,436 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-07-13 19:40:21,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:21,700 INFO L93 Difference]: Finished difference Result 370 states and 811 transitions. [2021-07-13 19:40:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:40:21,700 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 [2021-07-13 19:40:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:21,700 INFO L225 Difference]: With dead ends: 370 [2021-07-13 19:40:21,700 INFO L226 Difference]: Without dead ends: 363 [2021-07-13 19:40:21,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1141.4ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:40:21,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-07-13 19:40:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 343. [2021-07-13 19:40:21,703 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) [2021-07-13 19:40:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 772 transitions. [2021-07-13 19:40:21,703 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 772 transitions. Word has length 20 [2021-07-13 19:40:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:21,703 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 772 transitions. [2021-07-13 19:40:21,703 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) [2021-07-13 19:40:21,703 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 772 transitions. [2021-07-13 19:40:21,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:21,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:21,704 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:21,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5431,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:21,904 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:21,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:21,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1593846359, now seen corresponding path program 639 times [2021-07-13 19:40:21,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:21,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123568132] [2021-07-13 19:40:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:22,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:22,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123568132] [2021-07-13 19:40:22,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123568132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:22,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51111491] [2021-07-13 19:40:22,158 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 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 [2021-07-13 19:40:22,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:40:22,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:22,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:40:22,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:22,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51111491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:22,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:22,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:22,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578608104] [2021-07-13 19:40:22,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:22,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:22,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:22,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:22,647 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) [2021-07-13 19:40:24,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:24,458 INFO L93 Difference]: Finished difference Result 447 states and 939 transitions. [2021-07-13 19:40:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:40:24,459 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 [2021-07-13 19:40:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:24,459 INFO L225 Difference]: With dead ends: 447 [2021-07-13 19:40:24,459 INFO L226 Difference]: Without dead ends: 409 [2021-07-13 19:40:24,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1977.2ms TimeCoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:40:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-07-13 19:40:24,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 342. [2021-07-13 19:40:24,462 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) [2021-07-13 19:40:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 769 transitions. [2021-07-13 19:40:24,462 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 769 transitions. Word has length 20 [2021-07-13 19:40:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:24,462 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 769 transitions. [2021-07-13 19:40:24,462 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) [2021-07-13 19:40:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 769 transitions. [2021-07-13 19:40:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:24,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:24,463 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:24,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5446 [2021-07-13 19:40:24,663 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:24,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1688053151, now seen corresponding path program 640 times [2021-07-13 19:40:24,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:24,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415031929] [2021-07-13 19:40:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:24,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:24,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415031929] [2021-07-13 19:40:24,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415031929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:24,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209624203] [2021-07-13 19:40:24,902 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 [2021-07-13 19:40:24,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:24,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:24,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:24,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:25,250 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-07-13 19:40:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:25,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209624203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:25,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:25,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:25,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169940265] [2021-07-13 19:40:25,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:25,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:25,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:25,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:25,419 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) [2021-07-13 19:40:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:25,868 INFO L93 Difference]: Finished difference Result 361 states and 798 transitions. [2021-07-13 19:40:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:40:25,869 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 [2021-07-13 19:40:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:25,869 INFO L225 Difference]: With dead ends: 361 [2021-07-13 19:40:25,869 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 19:40:25,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 888.7ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:40:25,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 19:40:25,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2021-07-13 19:40:25,872 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) [2021-07-13 19:40:25,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 773 transitions. [2021-07-13 19:40:25,872 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 773 transitions. Word has length 20 [2021-07-13 19:40:25,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:25,872 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 773 transitions. [2021-07-13 19:40:25,872 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) [2021-07-13 19:40:25,872 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 773 transitions. [2021-07-13 19:40:25,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:25,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:25,873 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:26,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5461 [2021-07-13 19:40:26,073 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:26,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:26,073 INFO L82 PathProgramCache]: Analyzing trace with hash 110711421, now seen corresponding path program 641 times [2021-07-13 19:40:26,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:26,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186237353] [2021-07-13 19:40:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:26,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:26,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186237353] [2021-07-13 19:40:26,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186237353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:26,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32747247] [2021-07-13 19:40:26,325 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 [2021-07-13 19:40:26,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:40:26,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:40:26,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:26,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32747247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:26,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:26,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:26,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115334171] [2021-07-13 19:40:26,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:26,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:26,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:26,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:26,761 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) [2021-07-13 19:40:27,795 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2021-07-13 19:40:27,935 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-07-13 19:40:28,078 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-07-13 19:40:28,305 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-07-13 19:40:28,694 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-07-13 19:40:28,840 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-07-13 19:40:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:28,857 INFO L93 Difference]: Finished difference Result 428 states and 906 transitions. [2021-07-13 19:40:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:40:28,857 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 [2021-07-13 19:40:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:28,857 INFO L225 Difference]: With dead ends: 428 [2021-07-13 19:40:28,857 INFO L226 Difference]: Without dead ends: 396 [2021-07-13 19:40:28,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2320.6ms TimeCoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:40:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-13 19:40:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 343. [2021-07-13 19:40:28,860 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) [2021-07-13 19:40:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 771 transitions. [2021-07-13 19:40:28,860 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 771 transitions. Word has length 20 [2021-07-13 19:40:28,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:28,860 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 771 transitions. [2021-07-13 19:40:28,861 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) [2021-07-13 19:40:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 771 transitions. [2021-07-13 19:40:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:28,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:28,861 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:29,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5472,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:29,061 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:29,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:29,062 INFO L82 PathProgramCache]: Analyzing trace with hash 617057687, now seen corresponding path program 642 times [2021-07-13 19:40:29,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:29,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229680568] [2021-07-13 19:40:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:29,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:29,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229680568] [2021-07-13 19:40:29,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229680568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:29,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407798189] [2021-07-13 19:40:29,314 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 [2021-07-13 19:40:29,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:40:29,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:29,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 19:40:29,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:29,650 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 19:40:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:29,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407798189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:29,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:29,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:29,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034584534] [2021-07-13 19:40:29,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:29,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:29,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:29,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:29,771 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) [2021-07-13 19:40:30,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:30,354 INFO L93 Difference]: Finished difference Result 386 states and 839 transitions. [2021-07-13 19:40:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:40:30,354 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 [2021-07-13 19:40:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:30,355 INFO L225 Difference]: With dead ends: 386 [2021-07-13 19:40:30,355 INFO L226 Difference]: Without dead ends: 375 [2021-07-13 19:40:30,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 926.5ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:40:30,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-07-13 19:40:30,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 345. [2021-07-13 19:40:30,357 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) [2021-07-13 19:40:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 775 transitions. [2021-07-13 19:40:30,358 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 775 transitions. Word has length 20 [2021-07-13 19:40:30,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:30,358 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 775 transitions. [2021-07-13 19:40:30,358 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) [2021-07-13 19:40:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 775 transitions. [2021-07-13 19:40:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:30,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:30,358 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:30,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5487 [2021-07-13 19:40:30,559 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:30,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:30,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1951649017, now seen corresponding path program 643 times [2021-07-13 19:40:30,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:30,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81951675] [2021-07-13 19:40:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:30,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:30,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81951675] [2021-07-13 19:40:30,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81951675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:30,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205099447] [2021-07-13 19:40:30,753 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 [2021-07-13 19:40:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:30,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:30,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:31,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205099447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:31,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:31,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:31,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598891321] [2021-07-13 19:40:31,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:31,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:31,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:31,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:31,193 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) [2021-07-13 19:40:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:32,011 INFO L93 Difference]: Finished difference Result 424 states and 902 transitions. [2021-07-13 19:40:32,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:40:32,011 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 [2021-07-13 19:40:32,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:32,012 INFO L225 Difference]: With dead ends: 424 [2021-07-13 19:40:32,012 INFO L226 Difference]: Without dead ends: 405 [2021-07-13 19:40:32,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1012.0ms TimeCoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:40:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-07-13 19:40:32,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 344. [2021-07-13 19:40:32,015 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) [2021-07-13 19:40:32,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 773 transitions. [2021-07-13 19:40:32,015 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 773 transitions. Word has length 20 [2021-07-13 19:40:32,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:32,015 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 773 transitions. [2021-07-13 19:40:32,015 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) [2021-07-13 19:40:32,015 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 773 transitions. [2021-07-13 19:40:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:32,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:32,015 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:32,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5499,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:32,216 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:32,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:32,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1413793439, now seen corresponding path program 644 times [2021-07-13 19:40:32,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:32,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056015412] [2021-07-13 19:40:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:32,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:32,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056015412] [2021-07-13 19:40:32,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056015412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:32,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612899546] [2021-07-13 19:40:32,423 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 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 [2021-07-13 19:40:32,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:32,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:32,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:32,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:32,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612899546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:32,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:32,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:32,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861396302] [2021-07-13 19:40:32,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:32,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:32,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:32,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:32,837 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) [2021-07-13 19:40:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:33,594 INFO L93 Difference]: Finished difference Result 416 states and 892 transitions. [2021-07-13 19:40:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:40:33,595 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 [2021-07-13 19:40:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:33,595 INFO L225 Difference]: With dead ends: 416 [2021-07-13 19:40:33,595 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 19:40:33,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1005.3ms TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:40:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 19:40:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 344. [2021-07-13 19:40:33,598 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) [2021-07-13 19:40:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 773 transitions. [2021-07-13 19:40:33,599 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 773 transitions. Word has length 20 [2021-07-13 19:40:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:33,599 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 773 transitions. [2021-07-13 19:40:33,599 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) [2021-07-13 19:40:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 773 transitions. [2021-07-13 19:40:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:33,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:33,599 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:33,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5512 [2021-07-13 19:40:33,800 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:33,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1339456967, now seen corresponding path program 645 times [2021-07-13 19:40:33,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:33,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543210448] [2021-07-13 19:40:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:34,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:34,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543210448] [2021-07-13 19:40:34,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543210448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:34,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981750840] [2021-07-13 19:40:34,049 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 [2021-07-13 19:40:34,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:40:34,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:34,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:40:34,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:34,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981750840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:34,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:34,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:34,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632575481] [2021-07-13 19:40:34,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:34,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:34,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:34,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:34,483 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) [2021-07-13 19:40:34,925 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-07-13 19:40:35,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:35,155 INFO L93 Difference]: Finished difference Result 374 states and 819 transitions. [2021-07-13 19:40:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:40:35,155 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 [2021-07-13 19:40:35,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:35,156 INFO L225 Difference]: With dead ends: 374 [2021-07-13 19:40:35,156 INFO L226 Difference]: Without dead ends: 367 [2021-07-13 19:40:35,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 929.1ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:40:35,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-07-13 19:40:35,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 347. [2021-07-13 19:40:35,158 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) [2021-07-13 19:40:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 780 transitions. [2021-07-13 19:40:35,159 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 780 transitions. Word has length 20 [2021-07-13 19:40:35,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:35,159 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 780 transitions. [2021-07-13 19:40:35,159 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) [2021-07-13 19:40:35,159 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 780 transitions. [2021-07-13 19:40:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:35,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:35,159 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:35,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5524,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:35,360 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:35,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:35,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1378168599, now seen corresponding path program 646 times [2021-07-13 19:40:35,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:35,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091586056] [2021-07-13 19:40:35,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:35,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:35,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091586056] [2021-07-13 19:40:35,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091586056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:35,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127466104] [2021-07-13 19:40:35,630 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 [2021-07-13 19:40:35,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:35,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:35,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:35,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:36,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127466104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:36,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:36,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:36,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027491715] [2021-07-13 19:40:36,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:36,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:36,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:36,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:36,129 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) [2021-07-13 19:40:36,695 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-07-13 19:40:37,613 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2021-07-13 19:40:37,805 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-07-13 19:40:37,939 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-07-13 19:40:38,164 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2021-07-13 19:40:38,473 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-07-13 19:40:38,667 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-07-13 19:40:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:38,687 INFO L93 Difference]: Finished difference Result 431 states and 914 transitions. [2021-07-13 19:40:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:40:38,687 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 [2021-07-13 19:40:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:38,688 INFO L225 Difference]: With dead ends: 431 [2021-07-13 19:40:38,688 INFO L226 Difference]: Without dead ends: 400 [2021-07-13 19:40:38,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 2763.2ms TimeCoverageRelationStatistics Valid=249, Invalid=1821, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:40:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-13 19:40:38,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 346. [2021-07-13 19:40:38,690 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) [2021-07-13 19:40:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 777 transitions. [2021-07-13 19:40:38,691 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 777 transitions. Word has length 20 [2021-07-13 19:40:38,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:38,691 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 777 transitions. [2021-07-13 19:40:38,691 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) [2021-07-13 19:40:38,691 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 777 transitions. [2021-07-13 19:40:38,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:38,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:38,691 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:38,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5539,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:38,892 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:38,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:38,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1884514865, now seen corresponding path program 647 times [2021-07-13 19:40:38,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:38,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091509654] [2021-07-13 19:40:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:39,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:39,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091509654] [2021-07-13 19:40:39,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091509654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:39,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691565305] [2021-07-13 19:40:39,118 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 [2021-07-13 19:40:39,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:40:39,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:39,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:39,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:39,452 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 19:40:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:39,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691565305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:39,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:39,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:39,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629933968] [2021-07-13 19:40:39,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:39,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:39,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:39,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:39,588 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) [2021-07-13 19:40:40,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:40,370 INFO L93 Difference]: Finished difference Result 388 states and 843 transitions. [2021-07-13 19:40:40,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:40:40,370 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 [2021-07-13 19:40:40,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:40,370 INFO L225 Difference]: With dead ends: 388 [2021-07-13 19:40:40,370 INFO L226 Difference]: Without dead ends: 377 [2021-07-13 19:40:40,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1105.0ms TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:40:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-07-13 19:40:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 348. [2021-07-13 19:40:40,373 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) [2021-07-13 19:40:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 781 transitions. [2021-07-13 19:40:40,373 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 781 transitions. Word has length 20 [2021-07-13 19:40:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:40,374 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 781 transitions. [2021-07-13 19:40:40,374 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) [2021-07-13 19:40:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 781 transitions. [2021-07-13 19:40:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:40,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:40,374 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:40,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5553 [2021-07-13 19:40:40,574 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:40,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:40,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1075861101, now seen corresponding path program 648 times [2021-07-13 19:40:40,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:40,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809042495] [2021-07-13 19:40:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:40,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:40,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809042495] [2021-07-13 19:40:40,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809042495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:40,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531635177] [2021-07-13 19:40:40,790 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 [2021-07-13 19:40:40,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:40:40,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:40,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:40,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:41,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531635177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:41,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:41,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:41,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397519213] [2021-07-13 19:40:41,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:41,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:41,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:41,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:41,227 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) [2021-07-13 19:40:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:42,332 INFO L93 Difference]: Finished difference Result 416 states and 895 transitions. [2021-07-13 19:40:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:40:42,332 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 [2021-07-13 19:40:42,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:42,333 INFO L225 Difference]: With dead ends: 416 [2021-07-13 19:40:42,333 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 19:40:42,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1331.5ms TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:40:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 19:40:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 347. [2021-07-13 19:40:42,335 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) [2021-07-13 19:40:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 779 transitions. [2021-07-13 19:40:42,336 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 779 transitions. Word has length 20 [2021-07-13 19:40:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:42,336 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 779 transitions. [2021-07-13 19:40:42,336 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) [2021-07-13 19:40:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 779 transitions. [2021-07-13 19:40:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:42,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:42,336 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:42,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5565,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:42,537 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:42,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1613716679, now seen corresponding path program 649 times [2021-07-13 19:40:42,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:42,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755204559] [2021-07-13 19:40:42,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:42,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:42,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755204559] [2021-07-13 19:40:42,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755204559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:42,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221659152] [2021-07-13 19:40:42,742 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 [2021-07-13 19:40:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:42,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:40:42,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:43,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221659152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:43,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:43,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:43,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801126265] [2021-07-13 19:40:43,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:43,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:43,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:43,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:43,092 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) [2021-07-13 19:40:43,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:43,981 INFO L93 Difference]: Finished difference Result 418 states and 896 transitions. [2021-07-13 19:40:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:40:43,981 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 [2021-07-13 19:40:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:43,982 INFO L225 Difference]: With dead ends: 418 [2021-07-13 19:40:43,982 INFO L226 Difference]: Without dead ends: 396 [2021-07-13 19:40:43,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1021.9ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:40:43,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-13 19:40:43,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 347. [2021-07-13 19:40:43,984 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) [2021-07-13 19:40:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 779 transitions. [2021-07-13 19:40:43,985 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 779 transitions. Word has length 20 [2021-07-13 19:40:43,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:43,985 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 779 transitions. [2021-07-13 19:40:43,985 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) [2021-07-13 19:40:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 779 transitions. [2021-07-13 19:40:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:43,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:43,985 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:44,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5578,650 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:44,186 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:44,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:44,186 INFO L82 PathProgramCache]: Analyzing trace with hash 401379927, now seen corresponding path program 650 times [2021-07-13 19:40:44,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:44,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219265852] [2021-07-13 19:40:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:44,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:44,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219265852] [2021-07-13 19:40:44,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219265852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:44,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718695480] [2021-07-13 19:40:44,422 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 [2021-07-13 19:40:44,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:44,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:44,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:40:44,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:44,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718695480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:44,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:44,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:44,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807977399] [2021-07-13 19:40:44,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:44,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:44,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:44,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:44,829 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) [2021-07-13 19:40:45,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:45,842 INFO L93 Difference]: Finished difference Result 407 states and 874 transitions. [2021-07-13 19:40:45,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:40:45,843 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 [2021-07-13 19:40:45,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:45,843 INFO L225 Difference]: With dead ends: 407 [2021-07-13 19:40:45,843 INFO L226 Difference]: Without dead ends: 375 [2021-07-13 19:40:45,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1241.2ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:40:45,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-07-13 19:40:45,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 349. [2021-07-13 19:40:45,846 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) [2021-07-13 19:40:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 783 transitions. [2021-07-13 19:40:45,846 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 783 transitions. Word has length 20 [2021-07-13 19:40:45,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:45,846 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 783 transitions. [2021-07-13 19:40:45,846 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) [2021-07-13 19:40:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 783 transitions. [2021-07-13 19:40:45,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:45,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:45,847 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:46,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5590 [2021-07-13 19:40:46,047 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:46,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:46,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1198115679, now seen corresponding path program 651 times [2021-07-13 19:40:46,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:46,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947185756] [2021-07-13 19:40:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:46,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:46,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947185756] [2021-07-13 19:40:46,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947185756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:46,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753754084] [2021-07-13 19:40:46,259 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 [2021-07-13 19:40:46,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:40:46,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:46,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 19:40:46,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:46,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753754084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:46,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:46,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:46,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244739596] [2021-07-13 19:40:46,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:46,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:46,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:46,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:46,669 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) [2021-07-13 19:40:47,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:47,406 INFO L93 Difference]: Finished difference Result 417 states and 892 transitions. [2021-07-13 19:40:47,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:40:47,406 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 [2021-07-13 19:40:47,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:47,406 INFO L225 Difference]: With dead ends: 417 [2021-07-13 19:40:47,406 INFO L226 Difference]: Without dead ends: 395 [2021-07-13 19:40:47,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 929.2ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:40:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-07-13 19:40:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 348. [2021-07-13 19:40:47,409 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) [2021-07-13 19:40:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 781 transitions. [2021-07-13 19:40:47,409 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 781 transitions. Word has length 20 [2021-07-13 19:40:47,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:47,410 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 781 transitions. [2021-07-13 19:40:47,410 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) [2021-07-13 19:40:47,410 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 781 transitions. [2021-07-13 19:40:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:47,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:47,410 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:47,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5605 [2021-07-13 19:40:47,610 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:47,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1704461945, now seen corresponding path program 652 times [2021-07-13 19:40:47,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:47,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977409342] [2021-07-13 19:40:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:47,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:47,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977409342] [2021-07-13 19:40:47,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977409342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:47,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296143606] [2021-07-13 19:40:47,783 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 [2021-07-13 19:40:47,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:47,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:47,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:40:47,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:48,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296143606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:48,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:48,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:48,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848231356] [2021-07-13 19:40:48,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:48,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:48,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:48,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:48,164 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) [2021-07-13 19:40:49,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:49,119 INFO L93 Difference]: Finished difference Result 422 states and 902 transitions. [2021-07-13 19:40:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:40:49,119 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 [2021-07-13 19:40:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:49,120 INFO L225 Difference]: With dead ends: 422 [2021-07-13 19:40:49,120 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 19:40:49,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1032.3ms TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:40:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 19:40:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 348. [2021-07-13 19:40:49,122 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) [2021-07-13 19:40:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 781 transitions. [2021-07-13 19:40:49,123 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 781 transitions. Word has length 20 [2021-07-13 19:40:49,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:49,123 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 781 transitions. [2021-07-13 19:40:49,123 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) [2021-07-13 19:40:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 781 transitions. [2021-07-13 19:40:49,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:49,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:49,123 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:49,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5618,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:49,324 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:49,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:49,324 INFO L82 PathProgramCache]: Analyzing trace with hash -702990113, now seen corresponding path program 653 times [2021-07-13 19:40:49,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:49,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19581377] [2021-07-13 19:40:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:49,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:49,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19581377] [2021-07-13 19:40:49,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19581377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:49,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261111937] [2021-07-13 19:40:49,581 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 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 [2021-07-13 19:40:49,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:40:49,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:49,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:40:49,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:50,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261111937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:50,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:50,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:50,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174478542] [2021-07-13 19:40:50,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:50,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:50,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:50,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:50,024 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) [2021-07-13 19:40:50,434 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-07-13 19:40:50,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:50,656 INFO L93 Difference]: Finished difference Result 376 states and 823 transitions. [2021-07-13 19:40:50,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:40:50,657 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 [2021-07-13 19:40:50,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:50,657 INFO L225 Difference]: With dead ends: 376 [2021-07-13 19:40:50,657 INFO L226 Difference]: Without dead ends: 369 [2021-07-13 19:40:50,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 944.3ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:40:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-13 19:40:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 349. [2021-07-13 19:40:50,660 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) [2021-07-13 19:40:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 784 transitions. [2021-07-13 19:40:50,660 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 784 transitions. Word has length 20 [2021-07-13 19:40:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:50,660 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 784 transitions. [2021-07-13 19:40:50,660 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) [2021-07-13 19:40:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 784 transitions. [2021-07-13 19:40:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:50,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:50,661 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:50,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 654 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5630 [2021-07-13 19:40:50,861 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:50,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:50,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2014635453, now seen corresponding path program 654 times [2021-07-13 19:40:50,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:50,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192720496] [2021-07-13 19:40:50,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:51,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:51,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192720496] [2021-07-13 19:40:51,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192720496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:51,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886757594] [2021-07-13 19:40:51,085 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 [2021-07-13 19:40:51,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:40:51,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:51,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886757594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:51,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:51,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:51,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254065261] [2021-07-13 19:40:51,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:51,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:51,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:51,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:51,575 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) [2021-07-13 19:40:52,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:52,383 INFO L93 Difference]: Finished difference Result 386 states and 843 transitions. [2021-07-13 19:40:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:40:52,383 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 [2021-07-13 19:40:52,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:52,384 INFO L225 Difference]: With dead ends: 386 [2021-07-13 19:40:52,384 INFO L226 Difference]: Without dead ends: 369 [2021-07-13 19:40:52,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1039.7ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:40:52,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-13 19:40:52,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 350. [2021-07-13 19:40:52,386 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) [2021-07-13 19:40:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 785 transitions. [2021-07-13 19:40:52,387 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 785 transitions. Word has length 20 [2021-07-13 19:40:52,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:52,387 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 785 transitions. [2021-07-13 19:40:52,387 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) [2021-07-13 19:40:52,387 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 785 transitions. [2021-07-13 19:40:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:52,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:52,387 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:52,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5645,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:52,588 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:52,588 INFO L82 PathProgramCache]: Analyzing trace with hash -945740513, now seen corresponding path program 655 times [2021-07-13 19:40:52,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:52,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847023619] [2021-07-13 19:40:52,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:52,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:52,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847023619] [2021-07-13 19:40:52,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847023619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:52,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718419197] [2021-07-13 19:40:52,797 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 [2021-07-13 19:40:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:52,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:40:52,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:53,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718419197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:53,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:53,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:53,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508756109] [2021-07-13 19:40:53,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:53,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:53,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:53,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:53,286 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) [2021-07-13 19:40:53,591 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-07-13 19:40:54,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:54,673 INFO L93 Difference]: Finished difference Result 406 states and 878 transitions. [2021-07-13 19:40:54,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:40:54,674 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 [2021-07-13 19:40:54,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:54,674 INFO L225 Difference]: With dead ends: 406 [2021-07-13 19:40:54,674 INFO L226 Difference]: Without dead ends: 382 [2021-07-13 19:40:54,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1645.1ms TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:40:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-07-13 19:40:54,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 351. [2021-07-13 19:40:54,677 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) [2021-07-13 19:40:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 788 transitions. [2021-07-13 19:40:54,677 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 788 transitions. Word has length 20 [2021-07-13 19:40:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:54,677 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 788 transitions. [2021-07-13 19:40:54,677 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) [2021-07-13 19:40:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 788 transitions. [2021-07-13 19:40:54,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:54,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:54,678 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:54,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5657,656 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:54,878 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:54,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1773985577, now seen corresponding path program 656 times [2021-07-13 19:40:54,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:54,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628384550] [2021-07-13 19:40:54,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:55,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:55,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628384550] [2021-07-13 19:40:55,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628384550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:55,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846591215] [2021-07-13 19:40:55,096 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 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 [2021-07-13 19:40:55,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:55,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:55,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:40:55,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:55,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846591215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:55,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:55,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:55,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928003998] [2021-07-13 19:40:55,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:55,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:55,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:55,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:55,504 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) [2021-07-13 19:40:56,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:56,390 INFO L93 Difference]: Finished difference Result 402 states and 871 transitions. [2021-07-13 19:40:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:40:56,390 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 [2021-07-13 19:40:56,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:56,391 INFO L225 Difference]: With dead ends: 402 [2021-07-13 19:40:56,391 INFO L226 Difference]: Without dead ends: 377 [2021-07-13 19:40:56,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1090.8ms TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:40:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-07-13 19:40:56,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 351. [2021-07-13 19:40:56,393 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) [2021-07-13 19:40:56,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 788 transitions. [2021-07-13 19:40:56,394 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 788 transitions. Word has length 20 [2021-07-13 19:40:56,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:56,394 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 788 transitions. [2021-07-13 19:40:56,394 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) [2021-07-13 19:40:56,394 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 788 transitions. [2021-07-13 19:40:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:56,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:56,394 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:56,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5668 [2021-07-13 19:40:56,595 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:56,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1817095683, now seen corresponding path program 657 times [2021-07-13 19:40:56,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:56,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171339885] [2021-07-13 19:40:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:56,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:56,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171339885] [2021-07-13 19:40:56,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171339885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:56,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421559347] [2021-07-13 19:40:56,806 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 [2021-07-13 19:40:56,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:40:56,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:56,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 19:40:56,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:57,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421559347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:57,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:57,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:57,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870247193] [2021-07-13 19:40:57,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:57,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:57,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:57,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:57,221 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) [2021-07-13 19:40:57,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:57,962 INFO L93 Difference]: Finished difference Result 404 states and 870 transitions. [2021-07-13 19:40:57,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:40:57,963 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 [2021-07-13 19:40:57,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:57,963 INFO L225 Difference]: With dead ends: 404 [2021-07-13 19:40:57,963 INFO L226 Difference]: Without dead ends: 375 [2021-07-13 19:40:57,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1027.5ms TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:40:57,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-07-13 19:40:57,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 352. [2021-07-13 19:40:57,966 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) [2021-07-13 19:40:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 789 transitions. [2021-07-13 19:40:57,966 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 789 transitions. Word has length 20 [2021-07-13 19:40:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:57,966 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 789 transitions. [2021-07-13 19:40:57,966 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) [2021-07-13 19:40:57,966 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 789 transitions. [2021-07-13 19:40:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:57,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:57,967 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:58,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5683 [2021-07-13 19:40:58,167 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:58,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:58,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1037846781, now seen corresponding path program 658 times [2021-07-13 19:40:58,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:58,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550525379] [2021-07-13 19:40:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:58,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:58,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550525379] [2021-07-13 19:40:58,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550525379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:58,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139320449] [2021-07-13 19:40:58,400 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 [2021-07-13 19:40:58,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:58,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:58,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:40:58,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:58,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139320449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:58,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:58,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:40:58,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091688675] [2021-07-13 19:40:58,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:40:58,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:58,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:40:58,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:58,795 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) [2021-07-13 19:40:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:59,691 INFO L93 Difference]: Finished difference Result 412 states and 884 transitions. [2021-07-13 19:40:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:40:59,692 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 [2021-07-13 19:40:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:59,692 INFO L225 Difference]: With dead ends: 412 [2021-07-13 19:40:59,692 INFO L226 Difference]: Without dead ends: 380 [2021-07-13 19:40:59,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1142.7ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:40:59,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-07-13 19:40:59,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 354. [2021-07-13 19:40:59,695 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) [2021-07-13 19:40:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 793 transitions. [2021-07-13 19:40:59,695 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 793 transitions. Word has length 20 [2021-07-13 19:40:59,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:59,695 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 793 transitions. [2021-07-13 19:40:59,695 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) [2021-07-13 19:40:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 793 transitions. [2021-07-13 19:40:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:40:59,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:59,696 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:59,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5697,659 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:59,896 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:59,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:59,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1834582533, now seen corresponding path program 659 times [2021-07-13 19:40:59,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:59,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119636525] [2021-07-13 19:40:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:00,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:00,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119636525] [2021-07-13 19:41:00,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119636525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:00,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310681438] [2021-07-13 19:41:00,063 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 [2021-07-13 19:41:00,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:41:00,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:00,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:00,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:00,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310681438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:00,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:00,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:00,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645422733] [2021-07-13 19:41:00,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:00,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:00,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:00,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:00,473 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) [2021-07-13 19:41:01,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:01,275 INFO L93 Difference]: Finished difference Result 426 states and 910 transitions. [2021-07-13 19:41:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:41:01,275 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 [2021-07-13 19:41:01,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:01,275 INFO L225 Difference]: With dead ends: 426 [2021-07-13 19:41:01,275 INFO L226 Difference]: Without dead ends: 383 [2021-07-13 19:41:01,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1047.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:41:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-07-13 19:41:01,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 356. [2021-07-13 19:41:01,278 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) [2021-07-13 19:41:01,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 797 transitions. [2021-07-13 19:41:01,278 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 797 transitions. Word has length 20 [2021-07-13 19:41:01,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:01,278 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 797 transitions. [2021-07-13 19:41:01,279 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) [2021-07-13 19:41:01,279 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 797 transitions. [2021-07-13 19:41:01,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:01,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:01,279 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:01,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5712,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:01,479 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:01,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:01,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1954038497, now seen corresponding path program 660 times [2021-07-13 19:41:01,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:01,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000462093] [2021-07-13 19:41:01,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:01,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:01,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000462093] [2021-07-13 19:41:01,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000462093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:01,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474365939] [2021-07-13 19:41:01,660 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 [2021-07-13 19:41:01,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:41:01,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:01,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:01,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:02,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474365939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:02,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:02,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:02,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402937403] [2021-07-13 19:41:02,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:02,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:02,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:02,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:02,102 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) [2021-07-13 19:41:02,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:02,920 INFO L93 Difference]: Finished difference Result 430 states and 918 transitions. [2021-07-13 19:41:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:41:02,920 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 [2021-07-13 19:41:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:02,921 INFO L225 Difference]: With dead ends: 430 [2021-07-13 19:41:02,921 INFO L226 Difference]: Without dead ends: 405 [2021-07-13 19:41:02,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1070.2ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:41:02,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-07-13 19:41:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 356. [2021-07-13 19:41:02,927 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) [2021-07-13 19:41:02,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 797 transitions. [2021-07-13 19:41:02,927 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 797 transitions. Word has length 20 [2021-07-13 19:41:02,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:02,927 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 797 transitions. [2021-07-13 19:41:02,927 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) [2021-07-13 19:41:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 797 transitions. [2021-07-13 19:41:02,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:02,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:02,928 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:03,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5724,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:03,128 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:03,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1989663337, now seen corresponding path program 661 times [2021-07-13 19:41:03,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:03,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436155992] [2021-07-13 19:41:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:03,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:03,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436155992] [2021-07-13 19:41:03,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436155992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:03,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207317813] [2021-07-13 19:41:03,365 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 [2021-07-13 19:41:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:03,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:41:03,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:03,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207317813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:03,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:03,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:03,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965812427] [2021-07-13 19:41:03,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:03,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:03,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:03,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:03,766 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) [2021-07-13 19:41:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:04,740 INFO L93 Difference]: Finished difference Result 417 states and 894 transitions. [2021-07-13 19:41:04,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:41:04,741 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 [2021-07-13 19:41:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:04,741 INFO L225 Difference]: With dead ends: 417 [2021-07-13 19:41:04,741 INFO L226 Difference]: Without dead ends: 385 [2021-07-13 19:41:04,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1172.4ms TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:41:04,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-07-13 19:41:04,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 359. [2021-07-13 19:41:04,744 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) [2021-07-13 19:41:04,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 803 transitions. [2021-07-13 19:41:04,744 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 803 transitions. Word has length 20 [2021-07-13 19:41:04,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:04,744 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 803 transitions. [2021-07-13 19:41:04,744 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) [2021-07-13 19:41:04,744 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 803 transitions. [2021-07-13 19:41:04,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:04,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:04,745 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:04,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 662 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5736 [2021-07-13 19:41:04,945 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1192927585, now seen corresponding path program 662 times [2021-07-13 19:41:04,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:04,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487603487] [2021-07-13 19:41:04,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:05,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:05,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487603487] [2021-07-13 19:41:05,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487603487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:05,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854717101] [2021-07-13 19:41:05,116 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 [2021-07-13 19:41:05,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:05,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:05,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:05,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:05,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854717101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:05,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:05,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:05,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045820990] [2021-07-13 19:41:05,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:05,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:05,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:05,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:05,601 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) [2021-07-13 19:41:06,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:06,658 INFO L93 Difference]: Finished difference Result 431 states and 922 transitions. [2021-07-13 19:41:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:41:06,658 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 [2021-07-13 19:41:06,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:06,659 INFO L225 Difference]: With dead ends: 431 [2021-07-13 19:41:06,659 INFO L226 Difference]: Without dead ends: 390 [2021-07-13 19:41:06,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1278.5ms TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:41:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-07-13 19:41:06,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 361. [2021-07-13 19:41:06,661 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) [2021-07-13 19:41:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 808 transitions. [2021-07-13 19:41:06,662 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 808 transitions. Word has length 20 [2021-07-13 19:41:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:06,662 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 808 transitions. [2021-07-13 19:41:06,662 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) [2021-07-13 19:41:06,662 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 808 transitions. [2021-07-13 19:41:06,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:06,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:06,662 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:06,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5751,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:06,863 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:06,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:06,863 INFO L82 PathProgramCache]: Analyzing trace with hash -686581319, now seen corresponding path program 663 times [2021-07-13 19:41:06,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:06,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035112133] [2021-07-13 19:41:06,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:07,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:07,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035112133] [2021-07-13 19:41:07,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035112133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:07,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39884214] [2021-07-13 19:41:07,053 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 [2021-07-13 19:41:07,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:41:07,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:07,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:41:07,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:07,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39884214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:07,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:07,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:07,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974852883] [2021-07-13 19:41:07,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:07,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:07,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:07,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:07,467 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) [2021-07-13 19:41:08,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:08,286 INFO L93 Difference]: Finished difference Result 431 states and 921 transitions. [2021-07-13 19:41:08,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:41:08,286 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 [2021-07-13 19:41:08,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:08,287 INFO L225 Difference]: With dead ends: 431 [2021-07-13 19:41:08,287 INFO L226 Difference]: Without dead ends: 406 [2021-07-13 19:41:08,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 974.4ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:41:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-07-13 19:41:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 361. [2021-07-13 19:41:08,289 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) [2021-07-13 19:41:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 808 transitions. [2021-07-13 19:41:08,290 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 808 transitions. Word has length 20 [2021-07-13 19:41:08,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:08,290 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 808 transitions. [2021-07-13 19:41:08,290 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) [2021-07-13 19:41:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 808 transitions. [2021-07-13 19:41:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:08,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:08,290 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:08,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5764,664 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:08,491 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:08,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:08,491 INFO L82 PathProgramCache]: Analyzing trace with hash 2125251039, now seen corresponding path program 664 times [2021-07-13 19:41:08,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:08,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898434538] [2021-07-13 19:41:08,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:08,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:08,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898434538] [2021-07-13 19:41:08,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898434538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:08,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685347711] [2021-07-13 19:41:08,687 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 [2021-07-13 19:41:08,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:08,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:08,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:41:08,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:09,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685347711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:09,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:09,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:09,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281759706] [2021-07-13 19:41:09,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:09,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:09,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:09,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:09,100 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) [2021-07-13 19:41:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:10,215 INFO L93 Difference]: Finished difference Result 435 states and 929 transitions. [2021-07-13 19:41:10,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:41:10,215 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 [2021-07-13 19:41:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:10,215 INFO L225 Difference]: With dead ends: 435 [2021-07-13 19:41:10,215 INFO L226 Difference]: Without dead ends: 407 [2021-07-13 19:41:10,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1240.4ms TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:41:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-07-13 19:41:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 362. [2021-07-13 19:41:10,218 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) [2021-07-13 19:41:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 810 transitions. [2021-07-13 19:41:10,218 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 810 transitions. Word has length 20 [2021-07-13 19:41:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:10,219 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 810 transitions. [2021-07-13 19:41:10,219 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) [2021-07-13 19:41:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 810 transitions. [2021-07-13 19:41:10,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:10,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:10,219 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:10,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5776,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:10,419 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:10,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:10,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1847613177, now seen corresponding path program 665 times [2021-07-13 19:41:10,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:10,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129621273] [2021-07-13 19:41:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:10,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:10,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129621273] [2021-07-13 19:41:10,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129621273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:10,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453289651] [2021-07-13 19:41:10,642 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 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 [2021-07-13 19:41:10,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:41:10,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:10,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:41:10,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:11,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453289651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:11,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:11,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:11,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414275962] [2021-07-13 19:41:11,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:11,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:11,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:11,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:11,110 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) [2021-07-13 19:41:11,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:11,488 INFO L93 Difference]: Finished difference Result 382 states and 841 transitions. [2021-07-13 19:41:11,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:41:11,488 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 [2021-07-13 19:41:11,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:11,489 INFO L225 Difference]: With dead ends: 382 [2021-07-13 19:41:11,489 INFO L226 Difference]: Without dead ends: 369 [2021-07-13 19:41:11,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 704.9ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:41:11,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-13 19:41:11,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 366. [2021-07-13 19:41:11,491 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) [2021-07-13 19:41:11,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 818 transitions. [2021-07-13 19:41:11,492 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 818 transitions. Word has length 20 [2021-07-13 19:41:11,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:11,492 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 818 transitions. [2021-07-13 19:41:11,492 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) [2021-07-13 19:41:11,492 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 818 transitions. [2021-07-13 19:41:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:11,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:11,493 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:11,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5789 [2021-07-13 19:41:11,693 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:11,693 INFO L82 PathProgramCache]: Analyzing trace with hash 270271447, now seen corresponding path program 666 times [2021-07-13 19:41:11,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:11,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366016246] [2021-07-13 19:41:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:11,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:11,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366016246] [2021-07-13 19:41:11,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366016246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:11,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731075274] [2021-07-13 19:41:11,939 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 [2021-07-13 19:41:11,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:41:11,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:11,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:11,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:12,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731075274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:12,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:12,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:12,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837882046] [2021-07-13 19:41:12,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:12,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:12,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:12,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:12,423 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) [2021-07-13 19:41:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:13,138 INFO L93 Difference]: Finished difference Result 406 states and 880 transitions. [2021-07-13 19:41:13,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:41:13,138 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 [2021-07-13 19:41:13,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:13,138 INFO L225 Difference]: With dead ends: 406 [2021-07-13 19:41:13,138 INFO L226 Difference]: Without dead ends: 395 [2021-07-13 19:41:13,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1018.6ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:41:13,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-07-13 19:41:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 367. [2021-07-13 19:41:13,141 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) [2021-07-13 19:41:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 820 transitions. [2021-07-13 19:41:13,141 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 820 transitions. Word has length 20 [2021-07-13 19:41:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:13,141 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 820 transitions. [2021-07-13 19:41:13,142 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) [2021-07-13 19:41:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 820 transitions. [2021-07-13 19:41:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:13,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:13,142 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:13,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5801,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:13,342 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:13,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:13,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1604862777, now seen corresponding path program 667 times [2021-07-13 19:41:13,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:13,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546906350] [2021-07-13 19:41:13,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:13,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:13,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546906350] [2021-07-13 19:41:13,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546906350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:13,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143936385] [2021-07-13 19:41:13,530 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 [2021-07-13 19:41:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:13,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:41:13,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:13,845 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 19:41:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:14,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143936385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:14,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:14,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:14,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019447390] [2021-07-13 19:41:14,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:14,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:14,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:14,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:14,004 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) [2021-07-13 19:41:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:15,130 INFO L93 Difference]: Finished difference Result 455 states and 963 transitions. [2021-07-13 19:41:15,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:41:15,130 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 [2021-07-13 19:41:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:15,131 INFO L225 Difference]: With dead ends: 455 [2021-07-13 19:41:15,131 INFO L226 Difference]: Without dead ends: 429 [2021-07-13 19:41:15,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1263.3ms TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:41:15,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-13 19:41:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 365. [2021-07-13 19:41:15,133 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) [2021-07-13 19:41:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 816 transitions. [2021-07-13 19:41:15,134 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 816 transitions. Word has length 20 [2021-07-13 19:41:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:15,134 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 816 transitions. [2021-07-13 19:41:15,134 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) [2021-07-13 19:41:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 816 transitions. [2021-07-13 19:41:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:15,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:15,134 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:15,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5813,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:15,335 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:15,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash 776617713, now seen corresponding path program 668 times [2021-07-13 19:41:15,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:15,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475482168] [2021-07-13 19:41:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:15,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:15,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475482168] [2021-07-13 19:41:15,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475482168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:15,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26031888] [2021-07-13 19:41:15,573 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 [2021-07-13 19:41:15,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:15,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:15,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:41:15,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:15,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26031888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:15,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:15,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:15,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198442826] [2021-07-13 19:41:15,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:15,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:15,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:15,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:15,980 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) [2021-07-13 19:41:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:17,110 INFO L93 Difference]: Finished difference Result 417 states and 901 transitions. [2021-07-13 19:41:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:41:17,110 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 [2021-07-13 19:41:17,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:17,110 INFO L225 Difference]: With dead ends: 417 [2021-07-13 19:41:17,110 INFO L226 Difference]: Without dead ends: 392 [2021-07-13 19:41:17,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1308.7ms TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:41:17,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-07-13 19:41:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 366. [2021-07-13 19:41:17,113 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) [2021-07-13 19:41:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 818 transitions. [2021-07-13 19:41:17,113 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 818 transitions. Word has length 20 [2021-07-13 19:41:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:17,114 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 818 transitions. [2021-07-13 19:41:17,114 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) [2021-07-13 19:41:17,114 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 818 transitions. [2021-07-13 19:41:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:17,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:17,114 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:17,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5825 [2021-07-13 19:41:17,315 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:17,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:17,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1573353465, now seen corresponding path program 669 times [2021-07-13 19:41:17,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:17,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668963075] [2021-07-13 19:41:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:17,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:17,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668963075] [2021-07-13 19:41:17,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668963075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:17,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707712765] [2021-07-13 19:41:17,510 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 [2021-07-13 19:41:17,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:41:17,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:17,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 19:41:17,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:17,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707712765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:17,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:17,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:17,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452401986] [2021-07-13 19:41:17,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:17,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:17,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:17,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:17,896 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) [2021-07-13 19:41:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:18,529 INFO L93 Difference]: Finished difference Result 435 states and 929 transitions. [2021-07-13 19:41:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:41:18,530 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 [2021-07-13 19:41:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:18,530 INFO L225 Difference]: With dead ends: 435 [2021-07-13 19:41:18,530 INFO L226 Difference]: Without dead ends: 413 [2021-07-13 19:41:18,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 744.0ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:41:18,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-07-13 19:41:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 365. [2021-07-13 19:41:18,533 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) [2021-07-13 19:41:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 816 transitions. [2021-07-13 19:41:18,533 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 816 transitions. Word has length 20 [2021-07-13 19:41:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:18,534 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 816 transitions. [2021-07-13 19:41:18,534 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) [2021-07-13 19:41:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 816 transitions. [2021-07-13 19:41:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:18,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:18,534 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:18,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5840,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:18,734 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:18,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:18,735 INFO L82 PathProgramCache]: Analyzing trace with hash -706517225, now seen corresponding path program 670 times [2021-07-13 19:41:18,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:18,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191655318] [2021-07-13 19:41:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:18,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:18,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191655318] [2021-07-13 19:41:18,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191655318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:18,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127660977] [2021-07-13 19:41:18,986 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 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 [2021-07-13 19:41:19,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:19,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:19,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:19,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:19,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127660977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:19,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:19,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:19,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002459247] [2021-07-13 19:41:19,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:19,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:19,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:19,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:19,467 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) [2021-07-13 19:41:20,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:20,643 INFO L93 Difference]: Finished difference Result 418 states and 903 transitions. [2021-07-13 19:41:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:41:20,644 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 [2021-07-13 19:41:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:20,644 INFO L225 Difference]: With dead ends: 418 [2021-07-13 19:41:20,644 INFO L226 Difference]: Without dead ends: 393 [2021-07-13 19:41:20,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1425.7ms TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:41:20,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-07-13 19:41:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 367. [2021-07-13 19:41:20,647 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) [2021-07-13 19:41:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 820 transitions. [2021-07-13 19:41:20,647 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 820 transitions. Word has length 20 [2021-07-13 19:41:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:20,647 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 820 transitions. [2021-07-13 19:41:20,647 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) [2021-07-13 19:41:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 820 transitions. [2021-07-13 19:41:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:20,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:20,648 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:20,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5852,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:20,848 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:20,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:20,848 INFO L82 PathProgramCache]: Analyzing trace with hash 90218527, now seen corresponding path program 671 times [2021-07-13 19:41:20,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:20,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988554542] [2021-07-13 19:41:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:21,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:21,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988554542] [2021-07-13 19:41:21,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988554542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:21,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069255361] [2021-07-13 19:41:21,016 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 [2021-07-13 19:41:21,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:41:21,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:21,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:21,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:21,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069255361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:21,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:21,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:21,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068442652] [2021-07-13 19:41:21,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:21,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:21,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:21,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:21,417 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) [2021-07-13 19:41:22,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:22,287 INFO L93 Difference]: Finished difference Result 439 states and 937 transitions. [2021-07-13 19:41:22,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:41:22,288 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 [2021-07-13 19:41:22,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:22,288 INFO L225 Difference]: With dead ends: 439 [2021-07-13 19:41:22,288 INFO L226 Difference]: Without dead ends: 396 [2021-07-13 19:41:22,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1036.9ms TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:41:22,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-07-13 19:41:22,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 366. [2021-07-13 19:41:22,291 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) [2021-07-13 19:41:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 818 transitions. [2021-07-13 19:41:22,292 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 818 transitions. Word has length 20 [2021-07-13 19:41:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:22,292 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 818 transitions. [2021-07-13 19:41:22,292 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) [2021-07-13 19:41:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 818 transitions. [2021-07-13 19:41:22,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:22,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:22,292 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:22,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5866,672 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:22,493 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:22,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:22,493 INFO L82 PathProgramCache]: Analyzing trace with hash 596564793, now seen corresponding path program 672 times [2021-07-13 19:41:22,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:22,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909206793] [2021-07-13 19:41:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:22,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:22,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909206793] [2021-07-13 19:41:22,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909206793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:22,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121897288] [2021-07-13 19:41:22,682 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 [2021-07-13 19:41:22,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:41:22,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:22,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:22,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:23,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121897288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:23,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:23,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:23,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759116264] [2021-07-13 19:41:23,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:23,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:23,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:23,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:23,126 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) [2021-07-13 19:41:23,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:23,888 INFO L93 Difference]: Finished difference Result 440 states and 939 transitions. [2021-07-13 19:41:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:41:23,888 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 [2021-07-13 19:41:23,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:23,889 INFO L225 Difference]: With dead ends: 440 [2021-07-13 19:41:23,889 INFO L226 Difference]: Without dead ends: 415 [2021-07-13 19:41:23,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 921.0ms TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:41:23,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-07-13 19:41:23,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 365. [2021-07-13 19:41:23,891 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) [2021-07-13 19:41:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 816 transitions. [2021-07-13 19:41:23,892 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 816 transitions. Word has length 20 [2021-07-13 19:41:23,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:23,892 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 816 transitions. [2021-07-13 19:41:23,892 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) [2021-07-13 19:41:23,892 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 816 transitions. [2021-07-13 19:41:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:23,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:23,892 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:24,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5878,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:24,093 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash 560939953, now seen corresponding path program 673 times [2021-07-13 19:41:24,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:24,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242409198] [2021-07-13 19:41:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:24,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:24,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242409198] [2021-07-13 19:41:24,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242409198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:24,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776166800] [2021-07-13 19:41:24,345 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 [2021-07-13 19:41:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:24,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:41:24,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:24,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776166800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:24,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:24,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:24,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747380254] [2021-07-13 19:41:24,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:24,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:24,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:24,789 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) [2021-07-13 19:41:25,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:25,675 INFO L93 Difference]: Finished difference Result 419 states and 905 transitions. [2021-07-13 19:41:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:41:25,675 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 [2021-07-13 19:41:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:25,676 INFO L225 Difference]: With dead ends: 419 [2021-07-13 19:41:25,676 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 19:41:25,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1149.6ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:41:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 19:41:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 368. [2021-07-13 19:41:25,678 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) [2021-07-13 19:41:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 822 transitions. [2021-07-13 19:41:25,679 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 822 transitions. Word has length 20 [2021-07-13 19:41:25,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:25,679 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 822 transitions. [2021-07-13 19:41:25,679 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) [2021-07-13 19:41:25,679 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 822 transitions. [2021-07-13 19:41:25,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:25,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:25,679 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:25,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5890 [2021-07-13 19:41:25,880 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:25,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:25,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1357675705, now seen corresponding path program 674 times [2021-07-13 19:41:25,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:25,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712732403] [2021-07-13 19:41:25,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:26,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:26,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712732403] [2021-07-13 19:41:26,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712732403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:26,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394622359] [2021-07-13 19:41:26,080 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 [2021-07-13 19:41:26,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:26,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:26,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:26,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:26,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394622359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:26,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:26,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:26,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377260930] [2021-07-13 19:41:26,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:26,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:26,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:26,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:26,477 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) [2021-07-13 19:41:27,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:27,191 INFO L93 Difference]: Finished difference Result 439 states and 939 transitions. [2021-07-13 19:41:27,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:41:27,192 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 [2021-07-13 19:41:27,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:27,192 INFO L225 Difference]: With dead ends: 439 [2021-07-13 19:41:27,192 INFO L226 Difference]: Without dead ends: 417 [2021-07-13 19:41:27,192 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 931.3ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:41:27,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-07-13 19:41:27,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 367. [2021-07-13 19:41:27,195 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) [2021-07-13 19:41:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 820 transitions. [2021-07-13 19:41:27,196 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 820 transitions. Word has length 20 [2021-07-13 19:41:27,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:27,196 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 820 transitions. [2021-07-13 19:41:27,196 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) [2021-07-13 19:41:27,196 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 820 transitions. [2021-07-13 19:41:27,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:27,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:27,196 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:27,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5902,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:27,396 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1864021971, now seen corresponding path program 675 times [2021-07-13 19:41:27,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:27,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696996018] [2021-07-13 19:41:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:27,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:27,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696996018] [2021-07-13 19:41:27,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696996018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:27,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174948229] [2021-07-13 19:41:27,569 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 [2021-07-13 19:41:27,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:41:27,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:27,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:27,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:28,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174948229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:28,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:28,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:28,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424427355] [2021-07-13 19:41:28,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:28,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:28,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:28,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:28,001 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) [2021-07-13 19:41:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:29,108 INFO L93 Difference]: Finished difference Result 464 states and 980 transitions. [2021-07-13 19:41:29,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:41:29,109 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 [2021-07-13 19:41:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:29,109 INFO L225 Difference]: With dead ends: 464 [2021-07-13 19:41:29,109 INFO L226 Difference]: Without dead ends: 404 [2021-07-13 19:41:29,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1291.7ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:41:29,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-07-13 19:41:29,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 370. [2021-07-13 19:41:29,112 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) [2021-07-13 19:41:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 826 transitions. [2021-07-13 19:41:29,113 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 826 transitions. Word has length 20 [2021-07-13 19:41:29,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:29,113 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 826 transitions. [2021-07-13 19:41:29,113 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) [2021-07-13 19:41:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 826 transitions. [2021-07-13 19:41:29,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:29,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:29,113 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:29,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5914 [2021-07-13 19:41:29,313 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:29,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:29,314 INFO L82 PathProgramCache]: Analyzing trace with hash 380887033, now seen corresponding path program 676 times [2021-07-13 19:41:29,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:29,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888497437] [2021-07-13 19:41:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:29,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:29,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888497437] [2021-07-13 19:41:29,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888497437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:29,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16919147] [2021-07-13 19:41:29,503 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 [2021-07-13 19:41:29,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:29,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:29,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:41:29,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:29,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16919147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:29,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:29,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-13 19:41:29,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629377720] [2021-07-13 19:41:29,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:41:29,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:29,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:41:29,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:29,901 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) [2021-07-13 19:41:31,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:31,032 INFO L93 Difference]: Finished difference Result 445 states and 949 transitions. [2021-07-13 19:41:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:41:31,032 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 [2021-07-13 19:41:31,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:31,032 INFO L225 Difference]: With dead ends: 445 [2021-07-13 19:41:31,032 INFO L226 Difference]: Without dead ends: 417 [2021-07-13 19:41:31,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1213.7ms TimeCoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:41:31,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-07-13 19:41:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 370. [2021-07-13 19:41:31,035 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) [2021-07-13 19:41:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 826 transitions. [2021-07-13 19:41:31,036 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 826 transitions. Word has length 20 [2021-07-13 19:41:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:31,036 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 826 transitions. [2021-07-13 19:41:31,036 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) [2021-07-13 19:41:31,036 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 826 transitions. [2021-07-13 19:41:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:31,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:31,036 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:31,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5926,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:31,237 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:31,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:31,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1197406807, now seen corresponding path program 677 times [2021-07-13 19:41:31,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:31,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569960092] [2021-07-13 19:41:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:31,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:31,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569960092] [2021-07-13 19:41:31,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569960092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:31,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749315817] [2021-07-13 19:41:31,503 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 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 [2021-07-13 19:41:31,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:41:31,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:31,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:31,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:31,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749315817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:31,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:31,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:41:31,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559791273] [2021-07-13 19:41:31,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:41:31,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:31,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:41:31,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:31,953 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) [2021-07-13 19:41:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:32,519 INFO L93 Difference]: Finished difference Result 405 states and 886 transitions. [2021-07-13 19:41:32,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:41:32,519 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 [2021-07-13 19:41:32,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:32,520 INFO L225 Difference]: With dead ends: 405 [2021-07-13 19:41:32,520 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 19:41:32,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 878.3ms TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:41:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 19:41:32,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 375. [2021-07-13 19:41:32,522 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) [2021-07-13 19:41:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 836 transitions. [2021-07-13 19:41:32,523 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 836 transitions. Word has length 20 [2021-07-13 19:41:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:32,523 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 836 transitions. [2021-07-13 19:41:32,523 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) [2021-07-13 19:41:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 836 transitions. [2021-07-13 19:41:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:32,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:32,523 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:32,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5939 [2021-07-13 19:41:32,724 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:32,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1762969159, now seen corresponding path program 678 times [2021-07-13 19:41:32,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:32,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045967308] [2021-07-13 19:41:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:32,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:32,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045967308] [2021-07-13 19:41:32,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045967308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:32,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925168533] [2021-07-13 19:41:32,907 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 [2021-07-13 19:41:32,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:41:32,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:32,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:32,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:33,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925168533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:33,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:33,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:41:33,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476656225] [2021-07-13 19:41:33,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:41:33,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:33,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:41:33,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:33,362 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) [2021-07-13 19:41:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:34,144 INFO L93 Difference]: Finished difference Result 452 states and 959 transitions. [2021-07-13 19:41:34,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:41:34,144 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 [2021-07-13 19:41:34,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:34,145 INFO L225 Difference]: With dead ends: 452 [2021-07-13 19:41:34,145 INFO L226 Difference]: Without dead ends: 433 [2021-07-13 19:41:34,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 982.0ms TimeCoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:41:34,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-07-13 19:41:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 374. [2021-07-13 19:41:34,148 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) [2021-07-13 19:41:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 834 transitions. [2021-07-13 19:41:34,148 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 834 transitions. Word has length 20 [2021-07-13 19:41:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:34,148 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 834 transitions. [2021-07-13 19:41:34,148 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) [2021-07-13 19:41:34,148 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 834 transitions. [2021-07-13 19:41:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:34,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:34,149 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:34,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5951,679 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:34,349 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:34,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1994142559, now seen corresponding path program 679 times [2021-07-13 19:41:34,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:34,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718404678] [2021-07-13 19:41:34,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:34,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:34,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718404678] [2021-07-13 19:41:34,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718404678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:34,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669250138] [2021-07-13 19:41:34,524 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 [2021-07-13 19:41:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:34,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:41:34,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:34,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669250138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:34,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:34,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:41:34,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989084887] [2021-07-13 19:41:34,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:41:34,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:34,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:41:34,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:34,885 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) [2021-07-13 19:41:35,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:35,749 INFO L93 Difference]: Finished difference Result 448 states and 959 transitions. [2021-07-13 19:41:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:41:35,749 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 [2021-07-13 19:41:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:35,750 INFO L225 Difference]: With dead ends: 448 [2021-07-13 19:41:35,750 INFO L226 Difference]: Without dead ends: 429 [2021-07-13 19:41:35,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 980.7ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:41:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-13 19:41:35,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 373. [2021-07-13 19:41:35,753 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) [2021-07-13 19:41:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 832 transitions. [2021-07-13 19:41:35,753 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 832 transitions. Word has length 20 [2021-07-13 19:41:35,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:35,753 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 832 transitions. [2021-07-13 19:41:35,753 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) [2021-07-13 19:41:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 832 transitions. [2021-07-13 19:41:35,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:35,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:35,754 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:35,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5964,680 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:35,954 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1794478471, now seen corresponding path program 680 times [2021-07-13 19:41:35,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:35,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847762687] [2021-07-13 19:41:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:36,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:36,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847762687] [2021-07-13 19:41:36,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847762687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:36,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143249848] [2021-07-13 19:41:36,131 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 [2021-07-13 19:41:36,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:36,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:36,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:41:36,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:36,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143249848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:36,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:36,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:41:36,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359042025] [2021-07-13 19:41:36,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:41:36,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:36,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:41:36,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:36,575 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) [2021-07-13 19:41:37,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:37,497 INFO L93 Difference]: Finished difference Result 454 states and 960 transitions. [2021-07-13 19:41:37,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:41:37,498 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 [2021-07-13 19:41:37,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:37,498 INFO L225 Difference]: With dead ends: 454 [2021-07-13 19:41:37,498 INFO L226 Difference]: Without dead ends: 419 [2021-07-13 19:41:37,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1087.4ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:41:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-07-13 19:41:37,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 373. [2021-07-13 19:41:37,501 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) [2021-07-13 19:41:37,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 832 transitions. [2021-07-13 19:41:37,502 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 832 transitions. Word has length 20 [2021-07-13 19:41:37,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:37,502 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 832 transitions. [2021-07-13 19:41:37,502 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) [2021-07-13 19:41:37,502 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 832 transitions. [2021-07-13 19:41:37,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:37,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:37,502 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:37,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5976,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:37,702 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:37,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:37,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1017353887, now seen corresponding path program 681 times [2021-07-13 19:41:37,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:37,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028190950] [2021-07-13 19:41:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:37,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:37,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028190950] [2021-07-13 19:41:37,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028190950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:37,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978067422] [2021-07-13 19:41:37,953 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 [2021-07-13 19:41:37,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:41:37,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:37,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:41:37,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:38,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978067422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:38,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:38,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:41:38,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523991666] [2021-07-13 19:41:38,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:41:38,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:38,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:41:38,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:38,418 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) [2021-07-13 19:41:39,494 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-07-13 19:41:39,721 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2021-07-13 19:41:39,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:39,865 INFO L93 Difference]: Finished difference Result 462 states and 978 transitions. [2021-07-13 19:41:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:41:39,865 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 [2021-07-13 19:41:39,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:39,865 INFO L225 Difference]: With dead ends: 462 [2021-07-13 19:41:39,865 INFO L226 Difference]: Without dead ends: 434 [2021-07-13 19:41:39,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1620.8ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:41:39,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-07-13 19:41:39,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 373. [2021-07-13 19:41:39,868 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) [2021-07-13 19:41:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 832 transitions. [2021-07-13 19:41:39,869 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 832 transitions. Word has length 20 [2021-07-13 19:41:39,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:39,869 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 832 transitions. [2021-07-13 19:41:39,869 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) [2021-07-13 19:41:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 832 transitions. [2021-07-13 19:41:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:39,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:39,869 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:40,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 682 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5990 [2021-07-13 19:41:40,070 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:40,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:40,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2010156231, now seen corresponding path program 682 times [2021-07-13 19:41:40,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:40,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514563221] [2021-07-13 19:41:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:40,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:40,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514563221] [2021-07-13 19:41:40,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514563221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:40,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344201499] [2021-07-13 19:41:40,315 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 [2021-07-13 19:41:40,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:40,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:40,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:40,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:40,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344201499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:40,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:40,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:41:40,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353827331] [2021-07-13 19:41:40,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:41:40,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:40,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:41:40,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:40,814 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) [2021-07-13 19:41:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:42,041 INFO L93 Difference]: Finished difference Result 462 states and 976 transitions. [2021-07-13 19:41:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:41:42,041 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 [2021-07-13 19:41:42,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:42,042 INFO L225 Difference]: With dead ends: 462 [2021-07-13 19:41:42,042 INFO L226 Difference]: Without dead ends: 421 [2021-07-13 19:41:42,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1441.7ms TimeCoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:41:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-07-13 19:41:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 374. [2021-07-13 19:41:42,045 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) [2021-07-13 19:41:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 834 transitions. [2021-07-13 19:41:42,045 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 834 transitions. Word has length 20 [2021-07-13 19:41:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:42,045 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 834 transitions. [2021-07-13 19:41:42,045 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) [2021-07-13 19:41:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 834 transitions. [2021-07-13 19:41:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:42,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:42,046 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:42,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 683 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6003 [2021-07-13 19:41:42,246 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:42,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:42,246 INFO L82 PathProgramCache]: Analyzing trace with hash -876135871, now seen corresponding path program 683 times [2021-07-13 19:41:42,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:42,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141967344] [2021-07-13 19:41:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:42,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:42,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141967344] [2021-07-13 19:41:42,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141967344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:42,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101436975] [2021-07-13 19:41:42,479 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 [2021-07-13 19:41:42,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:41:42,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:42,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:41:42,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:42,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101436975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:42,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:42,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:41:42,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009200859] [2021-07-13 19:41:42,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:41:42,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:42,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:41:42,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:42,892 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) [2021-07-13 19:41:43,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:43,407 INFO L93 Difference]: Finished difference Result 394 states and 865 transitions. [2021-07-13 19:41:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:41:43,407 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 [2021-07-13 19:41:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:43,408 INFO L225 Difference]: With dead ends: 394 [2021-07-13 19:41:43,408 INFO L226 Difference]: Without dead ends: 387 [2021-07-13 19:41:43,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 812.8ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:41:43,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-07-13 19:41:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 377. [2021-07-13 19:41:43,411 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) [2021-07-13 19:41:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 840 transitions. [2021-07-13 19:41:43,411 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 840 transitions. Word has length 20 [2021-07-13 19:41:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:43,411 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 840 transitions. [2021-07-13 19:41:43,411 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) [2021-07-13 19:41:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 840 transitions. [2021-07-13 19:41:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:43,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:43,412 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:43,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 684 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6015 [2021-07-13 19:41:43,612 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:43,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:43,612 INFO L82 PathProgramCache]: Analyzing trace with hash -578082913, now seen corresponding path program 684 times [2021-07-13 19:41:43,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:43,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130690759] [2021-07-13 19:41:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:43,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:43,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130690759] [2021-07-13 19:41:43,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130690759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:43,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917939167] [2021-07-13 19:41:43,855 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 [2021-07-13 19:41:43,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:41:43,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:43,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:44,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917939167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:44,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:44,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:41:44,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696223900] [2021-07-13 19:41:44,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:41:44,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:44,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:41:44,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:44,330 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) [2021-07-13 19:41:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:44,899 INFO L93 Difference]: Finished difference Result 403 states and 876 transitions. [2021-07-13 19:41:44,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:41:44,899 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 [2021-07-13 19:41:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:44,900 INFO L225 Difference]: With dead ends: 403 [2021-07-13 19:41:44,900 INFO L226 Difference]: Without dead ends: 378 [2021-07-13 19:41:44,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 922.7ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:41:44,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-13 19:41:44,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 376. [2021-07-13 19:41:44,905 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) [2021-07-13 19:41:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 838 transitions. [2021-07-13 19:41:44,906 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 838 transitions. Word has length 20 [2021-07-13 19:41:44,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:44,906 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 838 transitions. [2021-07-13 19:41:44,906 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) [2021-07-13 19:41:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 838 transitions. [2021-07-13 19:41:44,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:44,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:44,906 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:45,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6030 [2021-07-13 19:41:45,107 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:45,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:45,107 INFO L82 PathProgramCache]: Analyzing trace with hash 2063931009, now seen corresponding path program 685 times [2021-07-13 19:41:45,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:45,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500402319] [2021-07-13 19:41:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:45,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:45,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500402319] [2021-07-13 19:41:45,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500402319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:45,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552262195] [2021-07-13 19:41:45,301 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 [2021-07-13 19:41:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:45,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:41:45,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:45,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552262195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:45,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:45,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:41:45,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230898716] [2021-07-13 19:41:45,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:41:45,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:45,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:41:45,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:45,775 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) [2021-07-13 19:41:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:46,259 INFO L93 Difference]: Finished difference Result 392 states and 861 transitions. [2021-07-13 19:41:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:41:46,259 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 [2021-07-13 19:41:46,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:46,260 INFO L225 Difference]: With dead ends: 392 [2021-07-13 19:41:46,260 INFO L226 Difference]: Without dead ends: 379 [2021-07-13 19:41:46,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 800.4ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:41:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-13 19:41:46,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 377. [2021-07-13 19:41:46,263 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) [2021-07-13 19:41:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 840 transitions. [2021-07-13 19:41:46,263 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 840 transitions. Word has length 20 [2021-07-13 19:41:46,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:46,263 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 840 transitions. [2021-07-13 19:41:46,263 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) [2021-07-13 19:41:46,263 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 840 transitions. [2021-07-13 19:41:46,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:46,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:46,264 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:46,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6042,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:46,464 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:46,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:46,464 INFO L82 PathProgramCache]: Analyzing trace with hash 486589279, now seen corresponding path program 686 times [2021-07-13 19:41:46,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:46,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925163728] [2021-07-13 19:41:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:46,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:46,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925163728] [2021-07-13 19:41:46,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925163728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:46,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269816774] [2021-07-13 19:41:46,736 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 [2021-07-13 19:41:46,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:46,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:46,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:46,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:47,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269816774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:47,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:47,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:41:47,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103995601] [2021-07-13 19:41:47,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:41:47,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:47,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:41:47,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:47,243 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) [2021-07-13 19:41:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:48,073 INFO L93 Difference]: Finished difference Result 416 states and 900 transitions. [2021-07-13 19:41:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:41:48,073 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 [2021-07-13 19:41:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:48,073 INFO L225 Difference]: With dead ends: 416 [2021-07-13 19:41:48,073 INFO L226 Difference]: Without dead ends: 405 [2021-07-13 19:41:48,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1191.9ms TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:41:48,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-07-13 19:41:48,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 378. [2021-07-13 19:41:48,076 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) [2021-07-13 19:41:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 842 transitions. [2021-07-13 19:41:48,077 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 842 transitions. Word has length 20 [2021-07-13 19:41:48,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:48,077 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 842 transitions. [2021-07-13 19:41:48,077 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) [2021-07-13 19:41:48,077 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 842 transitions. [2021-07-13 19:41:48,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:48,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:48,077 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:48,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 687 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6054 [2021-07-13 19:41:48,278 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:48,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:48,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1821180609, now seen corresponding path program 687 times [2021-07-13 19:41:48,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:48,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444665158] [2021-07-13 19:41:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:48,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:48,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444665158] [2021-07-13 19:41:48,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444665158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:48,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944717189] [2021-07-13 19:41:48,473 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 [2021-07-13 19:41:48,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:41:48,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:48,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:41:48,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:48,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944717189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:48,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:48,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:41:48,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857476650] [2021-07-13 19:41:48,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:41:48,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:48,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:41:48,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:48,950 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) [2021-07-13 19:41:49,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:49,822 INFO L93 Difference]: Finished difference Result 434 states and 931 transitions. [2021-07-13 19:41:49,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:41:49,822 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 [2021-07-13 19:41:49,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:49,823 INFO L225 Difference]: With dead ends: 434 [2021-07-13 19:41:49,823 INFO L226 Difference]: Without dead ends: 408 [2021-07-13 19:41:49,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1121.6ms TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:41:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-07-13 19:41:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 377. [2021-07-13 19:41:49,825 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) [2021-07-13 19:41:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 840 transitions. [2021-07-13 19:41:49,826 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 840 transitions. Word has length 20 [2021-07-13 19:41:49,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:49,826 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 840 transitions. [2021-07-13 19:41:49,826 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) [2021-07-13 19:41:49,826 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 840 transitions. [2021-07-13 19:41:49,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:49,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:49,826 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:50,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6066,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:50,027 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:50,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:50,027 INFO L82 PathProgramCache]: Analyzing trace with hash 689374265, now seen corresponding path program 688 times [2021-07-13 19:41:50,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:50,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402989755] [2021-07-13 19:41:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:50,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:50,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402989755] [2021-07-13 19:41:50,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402989755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:50,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774426378] [2021-07-13 19:41:50,250 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 [2021-07-13 19:41:50,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:50,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:50,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 19:41:50,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:50,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774426378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:50,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:50,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:41:50,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089018462] [2021-07-13 19:41:50,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:41:50,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:50,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:41:50,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:50,672 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) [2021-07-13 19:41:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:51,189 INFO L93 Difference]: Finished difference Result 395 states and 868 transitions. [2021-07-13 19:41:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:41:51,190 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 [2021-07-13 19:41:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:51,190 INFO L225 Difference]: With dead ends: 395 [2021-07-13 19:41:51,190 INFO L226 Difference]: Without dead ends: 388 [2021-07-13 19:41:51,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 836.9ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:41:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-07-13 19:41:51,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 378. [2021-07-13 19:41:51,193 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) [2021-07-13 19:41:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 843 transitions. [2021-07-13 19:41:51,193 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 843 transitions. Word has length 20 [2021-07-13 19:41:51,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:51,193 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 843 transitions. [2021-07-13 19:41:51,193 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) [2021-07-13 19:41:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 843 transitions. [2021-07-13 19:41:51,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:41:51,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:51,194 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:51,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6081,689 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:51,394 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:51,394 INFO L82 PathProgramCache]: Analyzing trace with hash -963579109, now seen corresponding path program 689 times [2021-07-13 19:41:51,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:51,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738754821] [2021-07-13 19:41:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:51,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:51,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738754821] [2021-07-13 19:41:51,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738754821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:51,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920876338] [2021-07-13 19:41:51,624 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 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 [2021-07-13 19:41:51,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:41:51,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:51,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 19:41:51,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:52,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920876338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:52,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:52,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:41:52,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119746648] [2021-07-13 19:41:52,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:41:52,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:52,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:41:52,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:52,100 INFO L87 Difference]: Start difference. First operand 378 states and 843 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) Received shutdown request... [2021-07-13 19:41:52,331 WARN L222 SmtUtils]: Removed 14 from assertion stack [2021-07-13 19:41:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:41:52,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6096 [2021-07-13 19:41:52,532 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 19:41:52,534 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:41:52,535 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 19:41:52,535 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:41:52 BasicIcfg [2021-07-13 19:41:52,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:41:52,535 INFO L168 Benchmark]: Toolchain (without parser) took 840567.63 ms. Allocated memory was 223.3 MB in the beginning and 431.0 MB in the end (delta: 207.6 MB). Free memory was 202.4 MB in the beginning and 204.9 MB in the end (delta: -2.5 MB). Peak memory consumption was 206.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:41:52,535 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 223.3 MB. Free memory is still 203.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:41:52,536 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.43 ms. Allocated memory is still 223.3 MB. Free memory was 202.2 MB in the beginning and 200.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 19:41:52,536 INFO L168 Benchmark]: Boogie Preprocessor took 29.56 ms. Allocated memory is still 223.3 MB. Free memory was 200.8 MB in the beginning and 199.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:41:52,536 INFO L168 Benchmark]: RCFGBuilder took 329.98 ms. Allocated memory is still 223.3 MB. Free memory was 199.7 MB in the beginning and 178.3 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:41:52,536 INFO L168 Benchmark]: TraceAbstraction took 840181.47 ms. Allocated memory was 223.3 MB in the beginning and 431.0 MB in the end (delta: 207.6 MB). Free memory was 177.9 MB in the beginning and 204.9 MB in the end (delta: -27.0 MB). Peak memory consumption was 181.9 MB. Max. memory is 8.0 GB. [2021-07-13 19:41:52,536 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 0.09 ms. Allocated memory is still 223.3 MB. Free memory is still 203.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.43 ms. Allocated memory is still 223.3 MB. Free memory was 202.2 MB in the beginning and 200.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.56 ms. Allocated memory is still 223.3 MB. Free memory was 200.8 MB in the beginning and 199.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 329.98 ms. Allocated memory is still 223.3 MB. Free memory was 199.7 MB in the beginning and 178.3 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 840181.47 ms. Allocated memory was 223.3 MB in the beginning and 431.0 MB in the end (delta: 207.6 MB). Free memory was 177.9 MB in the beginning and 204.9 MB in the end (delta: -27.0 MB). Peak memory consumption was 181.9 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 constructing difference of abstraction (378states) and FLOYD_HOARE automaton (currently 6 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 53 for 46ms.. - 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: 840117.7ms, OverallIterations: 696, TraceHistogramMax: 5, EmptinessCheckTime: 211.2ms, AutomataDifference: 385645.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19759 SDtfs, 43171 SDslu, 170416 SDs, 0 SdLazy, 279574 SolverSat, 16482 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 107052.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25593 GetRequests, 7895 SyntacticMatches, 1 SemanticMatches, 17696 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87107 ImplicationChecksByTransitivity, 486327.7ms 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: 1570.0ms AutomataMinimizationTime, 695 MinimizatonAttempts, 25453 StatesRemovedByMinimization, 682 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2680.8ms SsaConstructionTime, 11154.9ms SatisfiabilityAnalysisTime, 285702.6ms InterpolantComputationTime, 25667 NumberOfCodeBlocks, 25667 NumberOfCodeBlocksAsserted, 2444 NumberOfCheckSat, 24282 ConstructedInterpolants, 2 QuantifiedInterpolants, 412991 SizeOfPredicates, 7485 NumberOfNonLiveVariables, 66871 ConjunctsInSsa, 24672 ConjunctsInUnsatCore, 1385 InterpolantComputations, 7 PerfectInterpolantSequences, 1779/20245 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