/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/bench/exp2x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:23:18,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:23:18,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:23:18,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:23:18,591 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:23:18,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:23:18,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:23:18,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:23:18,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:23:18,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:23:18,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:23:18,627 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:23:18,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:23:18,627 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:23:18,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:23:18,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:23:18,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:23:18,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:23:18,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:23:18,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:23:18,629 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:23:18,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:23:18,629 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:23:18,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:23:18,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:23:18,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:23:18,629 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:23:18,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:23:18,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:23:18,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:23:18,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:23:18,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:23:18,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:23:18,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:23:18,630 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:23:18,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:23:18,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:23:18,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:23:18,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:23:18,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:23:18,882 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:23:18,883 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:23:18,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl [2021-07-09 17:23:18,884 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl' [2021-07-09 17:23:18,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:23:18,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:23:18,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:23:18,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:23:18,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:23:18,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:18" (1/1) ... [2021-07-09 17:23:18,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:18" (1/1) ... [2021-07-09 17:23:18,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:23:18,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:23:18,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:23:18,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:23:18,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:18" (1/1) ... [2021-07-09 17:23:18,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:18" (1/1) ... [2021-07-09 17:23:18,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:18" (1/1) ... [2021-07-09 17:23:18,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:18" (1/1) ... [2021-07-09 17:23:18,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:18" (1/1) ... [2021-07-09 17:23:18,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:18" (1/1) ... [2021-07-09 17:23:18,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:18" (1/1) ... [2021-07-09 17:23:18,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:23:18,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:23:18,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:23:18,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:23:18,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:23:19,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:23:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:23:19,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:23:19,026 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:23:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:23:19,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:23:19,026 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:23:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:23:19,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:23:19,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:23:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:23:19,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:23:19,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 17:23:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 17:23:19,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 17:23:19,028 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:23:19,194 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:23:19,194 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:23:19,195 INFO L202 PluginConnector]: Adding new model exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:23:19 BoogieIcfgContainer [2021-07-09 17:23:19,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:23:19,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:23:19,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:23:19,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:23:19,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:23:18" (1/2) ... [2021-07-09 17:23:19,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b37b895 and model type exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:23:19, skipping insertion in model container [2021-07-09 17:23:19,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:23:19" (2/2) ... [2021-07-09 17:23:19,201 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x3.wvr.bpl [2021-07-09 17:23:19,206 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:23:19,206 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:23:19,207 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:23:19,207 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:23:19,278 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 17:23:19,294 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-09 17:23:19,307 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:23:19,307 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:23:19,307 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:23:19,307 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:23:19,307 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:23:19,307 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:23:19,307 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:23:19,307 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:23:19,314 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-07-09 17:23:19,388 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:19,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:19,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:19,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:19,409 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:19,409 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:19,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:19,415 INFO L82 PathProgramCache]: Analyzing trace with hash -786123805, now seen corresponding path program 1 times [2021-07-09 17:23:19,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:19,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371155331] [2021-07-09 17:23:19,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:19,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:19,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371155331] [2021-07-09 17:23:19,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371155331] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:19,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:19,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:23:19,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36739639] [2021-07-09 17:23:19,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:23:19,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:19,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:23:19,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:23:19,612 INFO L87 Difference]: Start difference. First operand has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:19,674 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-07-09 17:23:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:23:19,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 19 [2021-07-09 17:23:19,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:19,691 INFO L225 Difference]: With dead ends: 854 [2021-07-09 17:23:19,691 INFO L226 Difference]: Without dead ends: 823 [2021-07-09 17:23:19,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:23:19,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-07-09 17:23:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-07-09 17:23:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-07-09 17:23:19,754 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-07-09 17:23:19,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:19,755 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-07-09 17:23:19,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:19,756 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-07-09 17:23:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:23:19,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:19,758 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:19,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:23:19,758 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:19,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:19,759 INFO L82 PathProgramCache]: Analyzing trace with hash 707778243, now seen corresponding path program 1 times [2021-07-09 17:23:19,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:19,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437268087] [2021-07-09 17:23:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:19,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:19,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437268087] [2021-07-09 17:23:19,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437268087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:19,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666117182] [2021-07-09 17:23:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:19,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 17:23:19,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:19,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666117182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:19,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:19,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-09 17:23:19,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573907489] [2021-07-09 17:23:19,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:23:19,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:19,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:23:19,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:23:19,935 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:20,009 INFO L93 Difference]: Finished difference Result 1354 states and 5079 transitions. [2021-07-09 17:23:20,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:23:20,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 21 [2021-07-09 17:23:20,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:20,018 INFO L225 Difference]: With dead ends: 1354 [2021-07-09 17:23:20,018 INFO L226 Difference]: Without dead ends: 1354 [2021-07-09 17:23:20,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:20,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-07-09 17:23:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 687. [2021-07-09 17:23:20,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.956268221574344) internal successors, (2714), 686 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2714 transitions. [2021-07-09 17:23:20,093 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2714 transitions. Word has length 21 [2021-07-09 17:23:20,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:20,093 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2714 transitions. [2021-07-09 17:23:20,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,094 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2714 transitions. [2021-07-09 17:23:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:23:20,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:20,098 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:20,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 17:23:20,309 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:20,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:20,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1583514721, now seen corresponding path program 1 times [2021-07-09 17:23:20,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:20,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247364810] [2021-07-09 17:23:20,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:20,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:20,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247364810] [2021-07-09 17:23:20,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247364810] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:20,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:20,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:23:20,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882604838] [2021-07-09 17:23:20,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:20,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:20,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:20,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:20,352 INFO L87 Difference]: Start difference. First operand 687 states and 2714 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:20,396 INFO L93 Difference]: Finished difference Result 973 states and 3608 transitions. [2021-07-09 17:23:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:23:20,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 21 [2021-07-09 17:23:20,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:20,402 INFO L225 Difference]: With dead ends: 973 [2021-07-09 17:23:20,402 INFO L226 Difference]: Without dead ends: 953 [2021-07-09 17:23:20,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:20,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-07-09 17:23:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 775. [2021-07-09 17:23:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.8359173126614987) internal successors, (2969), 774 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2969 transitions. [2021-07-09 17:23:20,430 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2969 transitions. Word has length 21 [2021-07-09 17:23:20,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:20,430 INFO L482 AbstractCegarLoop]: Abstraction has 775 states and 2969 transitions. [2021-07-09 17:23:20,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2969 transitions. [2021-07-09 17:23:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:23:20,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:20,433 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:20,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:23:20,433 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:20,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1014138907, now seen corresponding path program 1 times [2021-07-09 17:23:20,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:20,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232587314] [2021-07-09 17:23:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:20,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:20,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232587314] [2021-07-09 17:23:20,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232587314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:20,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236677037] [2021-07-09 17:23:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:20,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 17:23:20,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:20,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236677037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:20,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:20,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-09 17:23:20,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055245076] [2021-07-09 17:23:20,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:20,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:20,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:20,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:20,591 INFO L87 Difference]: Start difference. First operand 775 states and 2969 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:20,647 INFO L93 Difference]: Finished difference Result 1748 states and 6634 transitions. [2021-07-09 17:23:20,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:20,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 21 [2021-07-09 17:23:20,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:20,662 INFO L225 Difference]: With dead ends: 1748 [2021-07-09 17:23:20,662 INFO L226 Difference]: Without dead ends: 1748 [2021-07-09 17:23:20,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:20,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-07-09 17:23:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 931. [2021-07-09 17:23:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.968817204301075) internal successors, (3691), 930 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3691 transitions. [2021-07-09 17:23:20,699 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3691 transitions. Word has length 21 [2021-07-09 17:23:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:20,699 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3691 transitions. [2021-07-09 17:23:20,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,699 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3691 transitions. [2021-07-09 17:23:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:23:20,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:20,703 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:20,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:20,917 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:20,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:20,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1222977381, now seen corresponding path program 1 times [2021-07-09 17:23:20,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:20,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839380784] [2021-07-09 17:23:20,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:20,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:20,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839380784] [2021-07-09 17:23:20,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839380784] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:20,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:20,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:23:20,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990447516] [2021-07-09 17:23:20,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:20,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:20,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:20,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:20,944 INFO L87 Difference]: Start difference. First operand 931 states and 3691 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:20,993 INFO L93 Difference]: Finished difference Result 1477 states and 5627 transitions. [2021-07-09 17:23:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:20,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 21 [2021-07-09 17:23:20,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:21,001 INFO L225 Difference]: With dead ends: 1477 [2021-07-09 17:23:21,001 INFO L226 Difference]: Without dead ends: 1453 [2021-07-09 17:23:21,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:21,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-07-09 17:23:21,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 985. [2021-07-09 17:23:21,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.9227642276422765) internal successors, (3860), 984 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3860 transitions. [2021-07-09 17:23:21,030 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3860 transitions. Word has length 21 [2021-07-09 17:23:21,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:21,030 INFO L482 AbstractCegarLoop]: Abstraction has 985 states and 3860 transitions. [2021-07-09 17:23:21,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3860 transitions. [2021-07-09 17:23:21,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:23:21,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:21,035 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:21,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:23:21,035 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:21,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:21,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1181159269, now seen corresponding path program 2 times [2021-07-09 17:23:21,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:21,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133098464] [2021-07-09 17:23:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:21,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:21,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133098464] [2021-07-09 17:23:21,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133098464] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:21,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:21,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:23:21,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82879128] [2021-07-09 17:23:21,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:21,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:21,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:21,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:21,117 INFO L87 Difference]: Start difference. First operand 985 states and 3860 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:21,158 INFO L93 Difference]: Finished difference Result 1520 states and 5831 transitions. [2021-07-09 17:23:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:21,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 21 [2021-07-09 17:23:21,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:21,168 INFO L225 Difference]: With dead ends: 1520 [2021-07-09 17:23:21,168 INFO L226 Difference]: Without dead ends: 1520 [2021-07-09 17:23:21,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-09 17:23:21,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1119. [2021-07-09 17:23:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.952593917710197) internal successors, (4419), 1118 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 4419 transitions. [2021-07-09 17:23:21,196 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 4419 transitions. Word has length 21 [2021-07-09 17:23:21,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:21,196 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 4419 transitions. [2021-07-09 17:23:21,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 4419 transitions. [2021-07-09 17:23:21,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:23:21,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:21,199 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:21,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:23:21,199 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:21,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:21,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1390219805, now seen corresponding path program 2 times [2021-07-09 17:23:21,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:21,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594895224] [2021-07-09 17:23:21,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:21,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:21,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594895224] [2021-07-09 17:23:21,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594895224] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:21,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:21,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:23:21,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924191141] [2021-07-09 17:23:21,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:21,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:21,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:21,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:21,239 INFO L87 Difference]: Start difference. First operand 1119 states and 4419 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:21,295 INFO L93 Difference]: Finished difference Result 1519 states and 5747 transitions. [2021-07-09 17:23:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:21,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 21 [2021-07-09 17:23:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:21,303 INFO L225 Difference]: With dead ends: 1519 [2021-07-09 17:23:21,303 INFO L226 Difference]: Without dead ends: 1478 [2021-07-09 17:23:21,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-07-09 17:23:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1174. [2021-07-09 17:23:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.9028132992327365) internal successors, (4578), 1173 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 4578 transitions. [2021-07-09 17:23:21,331 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 4578 transitions. Word has length 21 [2021-07-09 17:23:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:21,331 INFO L482 AbstractCegarLoop]: Abstraction has 1174 states and 4578 transitions. [2021-07-09 17:23:21,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 4578 transitions. [2021-07-09 17:23:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:23:21,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:21,334 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:21,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:23:21,335 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:21,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:21,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1186899775, now seen corresponding path program 2 times [2021-07-09 17:23:21,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:21,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093839445] [2021-07-09 17:23:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:21,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:21,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093839445] [2021-07-09 17:23:21,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093839445] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:21,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:21,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:23:21,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655203590] [2021-07-09 17:23:21,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:23:21,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:21,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:23:21,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:21,378 INFO L87 Difference]: Start difference. First operand 1174 states and 4578 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:21,415 INFO L93 Difference]: Finished difference Result 1589 states and 6051 transitions. [2021-07-09 17:23:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:21,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 21 [2021-07-09 17:23:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:21,425 INFO L225 Difference]: With dead ends: 1589 [2021-07-09 17:23:21,425 INFO L226 Difference]: Without dead ends: 1589 [2021-07-09 17:23:21,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:21,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-07-09 17:23:21,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1285. [2021-07-09 17:23:21,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.9088785046728973) internal successors, (5019), 1284 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 5019 transitions. [2021-07-09 17:23:21,459 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 5019 transitions. Word has length 21 [2021-07-09 17:23:21,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:21,461 INFO L482 AbstractCegarLoop]: Abstraction has 1285 states and 5019 transitions. [2021-07-09 17:23:21,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 5019 transitions. [2021-07-09 17:23:21,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:23:21,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:21,465 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:21,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 17:23:21,465 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:21,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:21,465 INFO L82 PathProgramCache]: Analyzing trace with hash -462723457, now seen corresponding path program 1 times [2021-07-09 17:23:21,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:21,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134997783] [2021-07-09 17:23:21,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:21,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:21,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134997783] [2021-07-09 17:23:21,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134997783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:21,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006276162] [2021-07-09 17:23:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:21,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:21,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:21,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006276162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:21,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:21,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-07-09 17:23:21,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331677305] [2021-07-09 17:23:21,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:23:21,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:21,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:23:21,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:21,652 INFO L87 Difference]: Start difference. First operand 1285 states and 5019 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:21,722 INFO L93 Difference]: Finished difference Result 2143 states and 8130 transitions. [2021-07-09 17:23:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:21,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 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 23 [2021-07-09 17:23:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:21,735 INFO L225 Difference]: With dead ends: 2143 [2021-07-09 17:23:21,735 INFO L226 Difference]: Without dead ends: 2075 [2021-07-09 17:23:21,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-07-09 17:23:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1564. [2021-07-09 17:23:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.9366602687140113) internal successors, (6153), 1563 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 6153 transitions. [2021-07-09 17:23:21,778 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 6153 transitions. Word has length 23 [2021-07-09 17:23:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:21,778 INFO L482 AbstractCegarLoop]: Abstraction has 1564 states and 6153 transitions. [2021-07-09 17:23:21,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 6153 transitions. [2021-07-09 17:23:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:23:21,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:21,782 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:21,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:21,997 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:21,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1935689983, now seen corresponding path program 2 times [2021-07-09 17:23:21,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:21,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401721722] [2021-07-09 17:23:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:23:22,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:22,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401721722] [2021-07-09 17:23:22,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401721722] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:22,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:22,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:23:22,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689844106] [2021-07-09 17:23:22,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:22,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:22,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:22,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:22,035 INFO L87 Difference]: Start difference. First operand 1564 states and 6153 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:22,093 INFO L93 Difference]: Finished difference Result 2365 states and 9064 transitions. [2021-07-09 17:23:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:23:22,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:23:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:22,102 INFO L225 Difference]: With dead ends: 2365 [2021-07-09 17:23:22,102 INFO L226 Difference]: Without dead ends: 2297 [2021-07-09 17:23:22,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:22,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-07-09 17:23:22,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1785. [2021-07-09 17:23:22,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.9551569506726456) internal successors, (7056), 1784 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 7056 transitions. [2021-07-09 17:23:22,146 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 7056 transitions. Word has length 23 [2021-07-09 17:23:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:22,147 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 7056 transitions. [2021-07-09 17:23:22,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 7056 transitions. [2021-07-09 17:23:22,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:23:22,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:22,151 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:22,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-09 17:23:22,151 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:22,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:22,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1143796455, now seen corresponding path program 1 times [2021-07-09 17:23:22,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:22,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458831729] [2021-07-09 17:23:22,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:22,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:22,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458831729] [2021-07-09 17:23:22,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458831729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:22,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682084727] [2021-07-09 17:23:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-07-09 17:23:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:22,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:23:22,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:22,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682084727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:22,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:22,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-07-09 17:23:22,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423756209] [2021-07-09 17:23:22,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:23:22,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:22,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:23:22,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:22,333 INFO L87 Difference]: Start difference. First operand 1785 states and 7056 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:22,416 INFO L93 Difference]: Finished difference Result 2448 states and 9424 transitions. [2021-07-09 17:23:22,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:22,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 23 [2021-07-09 17:23:22,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:22,426 INFO L225 Difference]: With dead ends: 2448 [2021-07-09 17:23:22,426 INFO L226 Difference]: Without dead ends: 2397 [2021-07-09 17:23:22,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:22,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-07-09 17:23:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 2051. [2021-07-09 17:23:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.951219512195122) internal successors, (8100), 2050 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 8100 transitions. [2021-07-09 17:23:22,476 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 8100 transitions. Word has length 23 [2021-07-09 17:23:22,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:22,476 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 8100 transitions. [2021-07-09 17:23:22,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 8100 transitions. [2021-07-09 17:23:22,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:23:22,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:22,483 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:22,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:22,699 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:22,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:22,699 INFO L82 PathProgramCache]: Analyzing trace with hash 774688287, now seen corresponding path program 2 times [2021-07-09 17:23:22,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:22,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545470187] [2021-07-09 17:23:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:23:22,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:22,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545470187] [2021-07-09 17:23:22,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545470187] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:22,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:22,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:23:22,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603348023] [2021-07-09 17:23:22,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:23:22,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:22,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:23:22,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:22,727 INFO L87 Difference]: Start difference. First operand 2051 states and 8100 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:22,784 INFO L93 Difference]: Finished difference Result 2710 states and 10468 transitions. [2021-07-09 17:23:22,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:23:22,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:23:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:22,794 INFO L225 Difference]: With dead ends: 2710 [2021-07-09 17:23:22,794 INFO L226 Difference]: Without dead ends: 2659 [2021-07-09 17:23:22,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:23:22,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-07-09 17:23:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2311. [2021-07-09 17:23:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 3.9484848484848483) internal successors, (9121), 2310 states have internal predecessors, (9121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 9121 transitions. [2021-07-09 17:23:22,871 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 9121 transitions. Word has length 23 [2021-07-09 17:23:22,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:22,871 INFO L482 AbstractCegarLoop]: Abstraction has 2311 states and 9121 transitions. [2021-07-09 17:23:22,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 9121 transitions. [2021-07-09 17:23:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:22,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:22,878 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:22,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-09 17:23:22,878 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:22,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:22,878 INFO L82 PathProgramCache]: Analyzing trace with hash -798934911, now seen corresponding path program 3 times [2021-07-09 17:23:22,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:22,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458390803] [2021-07-09 17:23:22,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:22,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:22,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458390803] [2021-07-09 17:23:22,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458390803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:22,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274360952] [2021-07-09 17:23:22,913 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:22,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:23:22,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:22,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:22,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:23,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274360952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:23,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:23,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:23:23,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191003617] [2021-07-09 17:23:23,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:23,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:23,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:23,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:23,038 INFO L87 Difference]: Start difference. First operand 2311 states and 9121 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:23,378 INFO L93 Difference]: Finished difference Result 6038 states and 23046 transitions. [2021-07-09 17:23:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:23:23,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:23,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:23,398 INFO L225 Difference]: With dead ends: 6038 [2021-07-09 17:23:23,398 INFO L226 Difference]: Without dead ends: 6038 [2021-07-09 17:23:23,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:23,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2021-07-09 17:23:23,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 2800. [2021-07-09 17:23:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 4.00821722043587) internal successors, (11219), 2799 states have internal predecessors, (11219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 11219 transitions. [2021-07-09 17:23:23,520 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 11219 transitions. Word has length 25 [2021-07-09 17:23:23,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:23,520 INFO L482 AbstractCegarLoop]: Abstraction has 2800 states and 11219 transitions. [2021-07-09 17:23:23,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:23,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 11219 transitions. [2021-07-09 17:23:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:23,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:23,527 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:23,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 17:23:23,741 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:23,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1862904449, now seen corresponding path program 4 times [2021-07-09 17:23:23,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:23,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512298201] [2021-07-09 17:23:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:23,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:23,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512298201] [2021-07-09 17:23:23,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512298201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:23,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698304383] [2021-07-09 17:23:23,760 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 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 [2021-07-09 17:23:23,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:23,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:23,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:23,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:23,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698304383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:23,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:23,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:23:23,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683801464] [2021-07-09 17:23:23,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:23,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:23,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:23,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:23,849 INFO L87 Difference]: Start difference. First operand 2800 states and 11219 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:24,047 INFO L93 Difference]: Finished difference Result 5607 states and 21463 transitions. [2021-07-09 17:23:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:23:24,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:24,066 INFO L225 Difference]: With dead ends: 5607 [2021-07-09 17:23:24,066 INFO L226 Difference]: Without dead ends: 5495 [2021-07-09 17:23:24,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:23:24,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2021-07-09 17:23:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 3696. [2021-07-09 17:23:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 3695 states have (on average 4.088227334235453) internal successors, (15106), 3695 states have internal predecessors, (15106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 15106 transitions. [2021-07-09 17:23:24,168 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 15106 transitions. Word has length 25 [2021-07-09 17:23:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:24,168 INFO L482 AbstractCegarLoop]: Abstraction has 3696 states and 15106 transitions. [2021-07-09 17:23:24,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 15106 transitions. [2021-07-09 17:23:24,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:24,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:24,205 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:24,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:24,406 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:24,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:24,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1040308611, now seen corresponding path program 5 times [2021-07-09 17:23:24,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:24,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622847615] [2021-07-09 17:23:24,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:24,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:24,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622847615] [2021-07-09 17:23:24,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622847615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:24,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617102421] [2021-07-09 17:23:24,426 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:24,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:23:24,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:24,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:24,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:24,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617102421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:24,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:24,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:23:24,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643618095] [2021-07-09 17:23:24,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:24,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:24,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:24,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:24,511 INFO L87 Difference]: Start difference. First operand 3696 states and 15106 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:24,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:24,698 INFO L93 Difference]: Finished difference Result 5302 states and 20641 transitions. [2021-07-09 17:23:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:23:24,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 25 [2021-07-09 17:23:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:24,716 INFO L225 Difference]: With dead ends: 5302 [2021-07-09 17:23:24,716 INFO L226 Difference]: Without dead ends: 5302 [2021-07-09 17:23:24,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:23:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5302 states. [2021-07-09 17:23:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 3659. [2021-07-09 17:23:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 4.064516129032258) internal successors, (14868), 3658 states have internal predecessors, (14868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 14868 transitions. [2021-07-09 17:23:24,826 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 14868 transitions. Word has length 25 [2021-07-09 17:23:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:24,826 INFO L482 AbstractCegarLoop]: Abstraction has 3659 states and 14868 transitions. [2021-07-09 17:23:24,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 14868 transitions. [2021-07-09 17:23:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:24,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:24,835 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:25,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 17:23:25,049 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:25,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:25,049 INFO L82 PathProgramCache]: Analyzing trace with hash -593697735, now seen corresponding path program 6 times [2021-07-09 17:23:25,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:25,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480164841] [2021-07-09 17:23:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:25,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:25,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480164841] [2021-07-09 17:23:25,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480164841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:25,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585481600] [2021-07-09 17:23:25,068 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:25,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:25,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:25,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:25,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:25,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585481600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:25,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:25,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:23:25,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585039906] [2021-07-09 17:23:25,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:25,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:25,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:25,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:25,201 INFO L87 Difference]: Start difference. First operand 3659 states and 14868 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:25,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:25,361 INFO L93 Difference]: Finished difference Result 4788 states and 18687 transitions. [2021-07-09 17:23:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:23:25,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 25 [2021-07-09 17:23:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:25,374 INFO L225 Difference]: With dead ends: 4788 [2021-07-09 17:23:25,375 INFO L226 Difference]: Without dead ends: 4768 [2021-07-09 17:23:25,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:23:25,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2021-07-09 17:23:25,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 3665. [2021-07-09 17:23:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3664 states have (on average 4.060316593886463) internal successors, (14877), 3664 states have internal predecessors, (14877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:25,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 14877 transitions. [2021-07-09 17:23:25,458 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 14877 transitions. Word has length 25 [2021-07-09 17:23:25,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:25,458 INFO L482 AbstractCegarLoop]: Abstraction has 3665 states and 14877 transitions. [2021-07-09 17:23:25,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:25,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 14877 transitions. [2021-07-09 17:23:25,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:25,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:25,467 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:25,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 17:23:25,681 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:25,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1848382593, now seen corresponding path program 7 times [2021-07-09 17:23:25,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:25,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90520970] [2021-07-09 17:23:25,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:25,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:25,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90520970] [2021-07-09 17:23:25,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90520970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:25,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042532813] [2021-07-09 17:23:25,711 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:25,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:25,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:25,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042532813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:25,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:25,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:23:25,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615754714] [2021-07-09 17:23:25,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:25,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:25,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:25,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:25,795 INFO L87 Difference]: Start difference. First operand 3665 states and 14877 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:25,984 INFO L93 Difference]: Finished difference Result 7954 states and 31437 transitions. [2021-07-09 17:23:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:23:25,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:26,009 INFO L225 Difference]: With dead ends: 7954 [2021-07-09 17:23:26,009 INFO L226 Difference]: Without dead ends: 7954 [2021-07-09 17:23:26,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:23:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2021-07-09 17:23:26,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 4610. [2021-07-09 17:23:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 4.175092210891734) internal successors, (19243), 4609 states have internal predecessors, (19243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 19243 transitions. [2021-07-09 17:23:26,159 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 19243 transitions. Word has length 25 [2021-07-09 17:23:26,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:26,159 INFO L482 AbstractCegarLoop]: Abstraction has 4610 states and 19243 transitions. [2021-07-09 17:23:26,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 19243 transitions. [2021-07-09 17:23:26,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:26,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:26,170 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:26,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:23:26,387 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:26,387 INFO L82 PathProgramCache]: Analyzing trace with hash 340782337, now seen corresponding path program 8 times [2021-07-09 17:23:26,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:26,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380932078] [2021-07-09 17:23:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:26,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:26,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380932078] [2021-07-09 17:23:26,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380932078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:26,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379944817] [2021-07-09 17:23:26,412 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:26,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:26,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:26,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:26,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:26,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379944817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:26,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:26,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:23:26,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076936496] [2021-07-09 17:23:26,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:26,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:26,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:26,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:26,521 INFO L87 Difference]: Start difference. First operand 4610 states and 19243 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:26,683 INFO L93 Difference]: Finished difference Result 6087 states and 24217 transitions. [2021-07-09 17:23:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:23:26,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:26,701 INFO L225 Difference]: With dead ends: 6087 [2021-07-09 17:23:26,701 INFO L226 Difference]: Without dead ends: 6059 [2021-07-09 17:23:26,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:23:26,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6059 states. [2021-07-09 17:23:26,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6059 to 4587. [2021-07-09 17:23:26,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4586 states have (on average 4.174662014827737) internal successors, (19145), 4586 states have internal predecessors, (19145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 19145 transitions. [2021-07-09 17:23:26,840 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 19145 transitions. Word has length 25 [2021-07-09 17:23:26,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:26,840 INFO L482 AbstractCegarLoop]: Abstraction has 4587 states and 19145 transitions. [2021-07-09 17:23:26,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:26,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 19145 transitions. [2021-07-09 17:23:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:26,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:26,851 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:27,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:23:27,067 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:27,067 INFO L82 PathProgramCache]: Analyzing trace with hash -718170243, now seen corresponding path program 9 times [2021-07-09 17:23:27,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:27,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861202503] [2021-07-09 17:23:27,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:27,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:27,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861202503] [2021-07-09 17:23:27,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861202503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:27,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024561201] [2021-07-09 17:23:27,087 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:27,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:23:27,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:27,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:27,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:27,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024561201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:27,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:27,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:23:27,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647157191] [2021-07-09 17:23:27,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:27,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:27,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:27,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:27,196 INFO L87 Difference]: Start difference. First operand 4587 states and 19145 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:27,424 INFO L93 Difference]: Finished difference Result 6950 states and 27646 transitions. [2021-07-09 17:23:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:23:27,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:27,445 INFO L225 Difference]: With dead ends: 6950 [2021-07-09 17:23:27,445 INFO L226 Difference]: Without dead ends: 6950 [2021-07-09 17:23:27,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:23:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6950 states. [2021-07-09 17:23:27,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 4669. [2021-07-09 17:23:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4669 states, 4668 states have (on average 4.1782347900599826) internal successors, (19504), 4668 states have internal predecessors, (19504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4669 states to 4669 states and 19504 transitions. [2021-07-09 17:23:27,560 INFO L78 Accepts]: Start accepts. Automaton has 4669 states and 19504 transitions. Word has length 25 [2021-07-09 17:23:27,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:27,561 INFO L482 AbstractCegarLoop]: Abstraction has 4669 states and 19504 transitions. [2021-07-09 17:23:27,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:27,561 INFO L276 IsEmpty]: Start isEmpty. Operand 4669 states and 19504 transitions. [2021-07-09 17:23:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:27,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:27,571 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:27,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:27,781 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:27,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:27,781 INFO L82 PathProgramCache]: Analyzing trace with hash -271559367, now seen corresponding path program 10 times [2021-07-09 17:23:27,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:27,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899829446] [2021-07-09 17:23:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:27,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:27,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899829446] [2021-07-09 17:23:27,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899829446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:27,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526575170] [2021-07-09 17:23:27,806 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:27,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:27,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:27,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:27,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:27,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526575170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:27,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:27,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:23:27,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485753734] [2021-07-09 17:23:27,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:27,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:27,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:27,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:27,941 INFO L87 Difference]: Start difference. First operand 4669 states and 19504 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:28,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:28,139 INFO L93 Difference]: Finished difference Result 7627 states and 29903 transitions. [2021-07-09 17:23:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:23:28,139 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:28,164 INFO L225 Difference]: With dead ends: 7627 [2021-07-09 17:23:28,164 INFO L226 Difference]: Without dead ends: 7607 [2021-07-09 17:23:28,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:23:28,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2021-07-09 17:23:28,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 4687. [2021-07-09 17:23:28,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 4.173068715322237) internal successors, (19555), 4686 states have internal predecessors, (19555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 19555 transitions. [2021-07-09 17:23:28,284 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 19555 transitions. Word has length 25 [2021-07-09 17:23:28,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:28,284 INFO L482 AbstractCegarLoop]: Abstraction has 4687 states and 19555 transitions. [2021-07-09 17:23:28,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:28,284 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 19555 transitions. [2021-07-09 17:23:28,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:28,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:28,295 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:28,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:28,497 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:28,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash -986916671, now seen corresponding path program 11 times [2021-07-09 17:23:28,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:28,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986402792] [2021-07-09 17:23:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:28,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:28,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986402792] [2021-07-09 17:23:28,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986402792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:28,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902547899] [2021-07-09 17:23:28,535 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:28,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:23:28,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:28,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:28,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:28,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902547899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:28,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:28,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:23:28,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214729988] [2021-07-09 17:23:28,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:28,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:28,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:28,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:28,625 INFO L87 Difference]: Start difference. First operand 4687 states and 19555 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:28,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:28,963 INFO L93 Difference]: Finished difference Result 7378 states and 29710 transitions. [2021-07-09 17:23:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:23:28,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:28,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:28,984 INFO L225 Difference]: With dead ends: 7378 [2021-07-09 17:23:28,984 INFO L226 Difference]: Without dead ends: 7378 [2021-07-09 17:23:28,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:28,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-07-09 17:23:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 5057. [2021-07-09 17:23:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5057 states, 5056 states have (on average 4.166139240506329) internal successors, (21064), 5056 states have internal predecessors, (21064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 21064 transitions. [2021-07-09 17:23:29,095 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 21064 transitions. Word has length 25 [2021-07-09 17:23:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:29,096 INFO L482 AbstractCegarLoop]: Abstraction has 5057 states and 21064 transitions. [2021-07-09 17:23:29,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 21064 transitions. [2021-07-09 17:23:29,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:29,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:29,107 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:29,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 17:23:29,309 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:29,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:29,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1472804639, now seen corresponding path program 12 times [2021-07-09 17:23:29,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:29,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144102831] [2021-07-09 17:23:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:29,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:29,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144102831] [2021-07-09 17:23:29,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144102831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:29,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961097922] [2021-07-09 17:23:29,330 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:29,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:23:29,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:29,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:29,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:29,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961097922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:29,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:29,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 17:23:29,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129935159] [2021-07-09 17:23:29,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:29,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:29,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:29,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:29,422 INFO L87 Difference]: Start difference. First operand 5057 states and 21064 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:29,619 INFO L93 Difference]: Finished difference Result 7943 states and 31115 transitions. [2021-07-09 17:23:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:23:29,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:29,640 INFO L225 Difference]: With dead ends: 7943 [2021-07-09 17:23:29,641 INFO L226 Difference]: Without dead ends: 7883 [2021-07-09 17:23:29,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:23:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7883 states. [2021-07-09 17:23:29,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7883 to 5255. [2021-07-09 17:23:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5255 states, 5254 states have (on average 4.142558051008756) internal successors, (21765), 5254 states have internal predecessors, (21765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 21765 transitions. [2021-07-09 17:23:29,806 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 21765 transitions. Word has length 25 [2021-07-09 17:23:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:29,806 INFO L482 AbstractCegarLoop]: Abstraction has 5255 states and 21765 transitions. [2021-07-09 17:23:29,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 21765 transitions. [2021-07-09 17:23:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:29,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:29,820 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:30,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:30,020 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:30,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:30,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1934629399, now seen corresponding path program 3 times [2021-07-09 17:23:30,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:30,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172806759] [2021-07-09 17:23:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:30,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:30,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172806759] [2021-07-09 17:23:30,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172806759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:30,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710274767] [2021-07-09 17:23:30,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:30,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:23:30,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:30,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:30,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:30,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710274767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:30,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:30,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:23:30,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967020879] [2021-07-09 17:23:30,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:30,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:30,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:30,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:30,144 INFO L87 Difference]: Start difference. First operand 5255 states and 21765 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:30,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:30,510 INFO L93 Difference]: Finished difference Result 15644 states and 64448 transitions. [2021-07-09 17:23:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:23:30,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:30,560 INFO L225 Difference]: With dead ends: 15644 [2021-07-09 17:23:30,560 INFO L226 Difference]: Without dead ends: 15644 [2021-07-09 17:23:30,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:23:30,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15644 states. [2021-07-09 17:23:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15644 to 7401. [2021-07-09 17:23:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7401 states, 7400 states have (on average 4.2628378378378375) internal successors, (31545), 7400 states have internal predecessors, (31545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7401 states to 7401 states and 31545 transitions. [2021-07-09 17:23:30,845 INFO L78 Accepts]: Start accepts. Automaton has 7401 states and 31545 transitions. Word has length 25 [2021-07-09 17:23:30,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:30,845 INFO L482 AbstractCegarLoop]: Abstraction has 7401 states and 31545 transitions. [2021-07-09 17:23:30,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:30,846 INFO L276 IsEmpty]: Start isEmpty. Operand 7401 states and 31545 transitions. [2021-07-09 17:23:30,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:30,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:30,861 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:31,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 17:23:31,061 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:31,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:31,062 INFO L82 PathProgramCache]: Analyzing trace with hash 450475369, now seen corresponding path program 4 times [2021-07-09 17:23:31,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:31,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67600907] [2021-07-09 17:23:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:31,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:31,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67600907] [2021-07-09 17:23:31,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67600907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:31,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342823488] [2021-07-09 17:23:31,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:31,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:31,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:31,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:31,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:31,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342823488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:31,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:31,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:23:31,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904686224] [2021-07-09 17:23:31,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:31,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:31,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:31,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:31,228 INFO L87 Difference]: Start difference. First operand 7401 states and 31545 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:31,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:31,446 INFO L93 Difference]: Finished difference Result 14414 states and 59525 transitions. [2021-07-09 17:23:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:23:31,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:31,493 INFO L225 Difference]: With dead ends: 14414 [2021-07-09 17:23:31,494 INFO L226 Difference]: Without dead ends: 14318 [2021-07-09 17:23:31,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:23:31,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14318 states. [2021-07-09 17:23:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14318 to 9947. [2021-07-09 17:23:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9947 states, 9946 states have (on average 4.3626583551176354) internal successors, (43391), 9946 states have internal predecessors, (43391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9947 states to 9947 states and 43391 transitions. [2021-07-09 17:23:31,744 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 43391 transitions. Word has length 25 [2021-07-09 17:23:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:31,745 INFO L482 AbstractCegarLoop]: Abstraction has 9947 states and 43391 transitions. [2021-07-09 17:23:31,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 43391 transitions. [2021-07-09 17:23:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:31,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:31,826 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:32,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:32,027 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:32,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1532446057, now seen corresponding path program 5 times [2021-07-09 17:23:32,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:32,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625349656] [2021-07-09 17:23:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:32,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:32,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625349656] [2021-07-09 17:23:32,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625349656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:32,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996186537] [2021-07-09 17:23:32,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:32,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:23:32,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:32,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:32,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:32,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996186537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:32,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:32,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-07-09 17:23:32,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197012789] [2021-07-09 17:23:32,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:32,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:32,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:32,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:32,123 INFO L87 Difference]: Start difference. First operand 9947 states and 43391 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:32,384 INFO L93 Difference]: Finished difference Result 14334 states and 59778 transitions. [2021-07-09 17:23:32,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:23:32,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:32,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:32,438 INFO L225 Difference]: With dead ends: 14334 [2021-07-09 17:23:32,438 INFO L226 Difference]: Without dead ends: 14334 [2021-07-09 17:23:32,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:23:32,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14334 states. [2021-07-09 17:23:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14334 to 9809. [2021-07-09 17:23:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9809 states, 9808 states have (on average 4.337173735725938) internal successors, (42539), 9808 states have internal predecessors, (42539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9809 states to 9809 states and 42539 transitions. [2021-07-09 17:23:32,728 INFO L78 Accepts]: Start accepts. Automaton has 9809 states and 42539 transitions. Word has length 25 [2021-07-09 17:23:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:32,728 INFO L482 AbstractCegarLoop]: Abstraction has 9809 states and 42539 transitions. [2021-07-09 17:23:32,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 9809 states and 42539 transitions. [2021-07-09 17:23:32,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:32,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:32,750 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:32,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 17:23:32,959 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:32,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1741506593, now seen corresponding path program 6 times [2021-07-09 17:23:32,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:32,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093660290] [2021-07-09 17:23:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:32,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:32,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093660290] [2021-07-09 17:23:32,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093660290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:32,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933245168] [2021-07-09 17:23:32,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:33,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:33,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:33,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:33,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:33,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933245168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:33,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:33,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-07-09 17:23:33,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475309705] [2021-07-09 17:23:33,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:33,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:33,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:33,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:33,063 INFO L87 Difference]: Start difference. First operand 9809 states and 42539 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:33,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:33,312 INFO L93 Difference]: Finished difference Result 12691 states and 52781 transitions. [2021-07-09 17:23:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:23:33,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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 25 [2021-07-09 17:23:33,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:33,352 INFO L225 Difference]: With dead ends: 12691 [2021-07-09 17:23:33,352 INFO L226 Difference]: Without dead ends: 12666 [2021-07-09 17:23:33,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:23:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12666 states. [2021-07-09 17:23:33,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12666 to 9875. [2021-07-09 17:23:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9875 states, 9874 states have (on average 4.332388089933158) internal successors, (42778), 9874 states have internal predecessors, (42778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9875 states to 9875 states and 42778 transitions. [2021-07-09 17:23:33,591 INFO L78 Accepts]: Start accepts. Automaton has 9875 states and 42778 transitions. Word has length 25 [2021-07-09 17:23:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:33,591 INFO L482 AbstractCegarLoop]: Abstraction has 9875 states and 42778 transitions. [2021-07-09 17:23:33,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 9875 states and 42778 transitions. [2021-07-09 17:23:33,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:33,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:33,614 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:33,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 17:23:33,815 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:33,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:33,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1837192415, now seen corresponding path program 7 times [2021-07-09 17:23:33,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:33,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244529343] [2021-07-09 17:23:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:33,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:33,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244529343] [2021-07-09 17:23:33,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244529343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:33,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644366667] [2021-07-09 17:23:33,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:33,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:33,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:33,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644366667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:33,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:33,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-07-09 17:23:33,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588096017] [2021-07-09 17:23:33,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:33,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:33,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:33,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:33,925 INFO L87 Difference]: Start difference. First operand 9875 states and 42778 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:34,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:34,183 INFO L93 Difference]: Finished difference Result 16572 states and 68392 transitions. [2021-07-09 17:23:34,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:23:34,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:34,236 INFO L225 Difference]: With dead ends: 16572 [2021-07-09 17:23:34,237 INFO L226 Difference]: Without dead ends: 16572 [2021-07-09 17:23:34,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:23:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16572 states. [2021-07-09 17:23:34,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16572 to 9875. [2021-07-09 17:23:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9875 states, 9874 states have (on average 4.3184119910877055) internal successors, (42640), 9874 states have internal predecessors, (42640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9875 states to 9875 states and 42640 transitions. [2021-07-09 17:23:34,491 INFO L78 Accepts]: Start accepts. Automaton has 9875 states and 42640 transitions. Word has length 25 [2021-07-09 17:23:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:34,491 INFO L482 AbstractCegarLoop]: Abstraction has 9875 states and 42640 transitions. [2021-07-09 17:23:34,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 9875 states and 42640 transitions. [2021-07-09 17:23:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:34,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:34,512 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:34,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:23:34,721 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:34,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2075155807, now seen corresponding path program 8 times [2021-07-09 17:23:34,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:34,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357197688] [2021-07-09 17:23:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:34,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:34,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357197688] [2021-07-09 17:23:34,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357197688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:34,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629114431] [2021-07-09 17:23:34,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:34,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:34,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:34,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:34,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:34,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629114431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:34,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:34,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-07-09 17:23:34,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866194455] [2021-07-09 17:23:34,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:34,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:34,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:34,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:34,816 INFO L87 Difference]: Start difference. First operand 9875 states and 42640 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:35,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:35,023 INFO L93 Difference]: Finished difference Result 13953 states and 57309 transitions. [2021-07-09 17:23:35,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:23:35,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:35,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:35,066 INFO L225 Difference]: With dead ends: 13953 [2021-07-09 17:23:35,066 INFO L226 Difference]: Without dead ends: 13929 [2021-07-09 17:23:35,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:23:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13929 states. [2021-07-09 17:23:35,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13929 to 9623. [2021-07-09 17:23:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9623 states, 9622 states have (on average 4.305757638744543) internal successors, (41430), 9622 states have internal predecessors, (41430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9623 states to 9623 states and 41430 transitions. [2021-07-09 17:23:35,346 INFO L78 Accepts]: Start accepts. Automaton has 9623 states and 41430 transitions. Word has length 25 [2021-07-09 17:23:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:35,346 INFO L482 AbstractCegarLoop]: Abstraction has 9623 states and 41430 transitions. [2021-07-09 17:23:35,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:35,346 INFO L276 IsEmpty]: Start isEmpty. Operand 9623 states and 41430 transitions. [2021-07-09 17:23:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:35,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:35,368 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:35,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:23:35,586 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:35,586 INFO L82 PathProgramCache]: Analyzing trace with hash 539314849, now seen corresponding path program 9 times [2021-07-09 17:23:35,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:35,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162675564] [2021-07-09 17:23:35,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:35,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:35,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162675564] [2021-07-09 17:23:35,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162675564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:35,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108044622] [2021-07-09 17:23:35,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:35,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:23:35,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:35,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:35,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:35,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108044622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:35,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:35,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-07-09 17:23:35,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380797555] [2021-07-09 17:23:35,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:35,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:35,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:35,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:35,696 INFO L87 Difference]: Start difference. First operand 9623 states and 41430 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:35,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:35,965 INFO L93 Difference]: Finished difference Result 16966 states and 70031 transitions. [2021-07-09 17:23:35,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:23:35,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:35,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:36,021 INFO L225 Difference]: With dead ends: 16966 [2021-07-09 17:23:36,021 INFO L226 Difference]: Without dead ends: 16966 [2021-07-09 17:23:36,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:23:36,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16966 states. [2021-07-09 17:23:36,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16966 to 9761. [2021-07-09 17:23:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 4.303893442622951) internal successors, (42006), 9760 states have internal predecessors, (42006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 42006 transitions. [2021-07-09 17:23:36,400 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 42006 transitions. Word has length 25 [2021-07-09 17:23:36,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:36,401 INFO L482 AbstractCegarLoop]: Abstraction has 9761 states and 42006 transitions. [2021-07-09 17:23:36,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:36,401 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 42006 transitions. [2021-07-09 17:23:36,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:36,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:36,423 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:36,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:23:36,623 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:36,624 INFO L82 PathProgramCache]: Analyzing trace with hash 748375385, now seen corresponding path program 10 times [2021-07-09 17:23:36,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:36,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573244618] [2021-07-09 17:23:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:36,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:36,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573244618] [2021-07-09 17:23:36,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573244618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:36,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118547095] [2021-07-09 17:23:36,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:36,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:36,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:36,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:36,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:36,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118547095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:36,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:36,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-07-09 17:23:36,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466307566] [2021-07-09 17:23:36,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:36,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:36,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:36,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:36,753 INFO L87 Difference]: Start difference. First operand 9761 states and 42006 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:36,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:36,975 INFO L93 Difference]: Finished difference Result 15336 states and 62550 transitions. [2021-07-09 17:23:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:23:36,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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 25 [2021-07-09 17:23:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:37,031 INFO L225 Difference]: With dead ends: 15336 [2021-07-09 17:23:37,032 INFO L226 Difference]: Without dead ends: 15311 [2021-07-09 17:23:37,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:23:37,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15311 states. [2021-07-09 17:23:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15311 to 9761. [2021-07-09 17:23:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 4.30266393442623) internal successors, (41994), 9760 states have internal predecessors, (41994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 41994 transitions. [2021-07-09 17:23:37,345 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 41994 transitions. Word has length 25 [2021-07-09 17:23:37,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:37,345 INFO L482 AbstractCegarLoop]: Abstraction has 9761 states and 41994 transitions. [2021-07-09 17:23:37,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:37,345 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 41994 transitions. [2021-07-09 17:23:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:37,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:37,369 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:37,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:37,569 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:37,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:37,570 INFO L82 PathProgramCache]: Analyzing trace with hash -334939811, now seen corresponding path program 11 times [2021-07-09 17:23:37,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:37,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653008188] [2021-07-09 17:23:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:37,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:37,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653008188] [2021-07-09 17:23:37,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653008188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:37,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007929081] [2021-07-09 17:23:37,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:37,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:23:37,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:37,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:37,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:37,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007929081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:37,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:37,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:23:37,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609204895] [2021-07-09 17:23:37,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:37,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:37,687 INFO L87 Difference]: Start difference. First operand 9761 states and 41994 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:38,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:38,059 INFO L93 Difference]: Finished difference Result 16139 states and 67397 transitions. [2021-07-09 17:23:38,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:23:38,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:38,118 INFO L225 Difference]: With dead ends: 16139 [2021-07-09 17:23:38,119 INFO L226 Difference]: Without dead ends: 16139 [2021-07-09 17:23:38,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:23:38,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2021-07-09 17:23:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 10624. [2021-07-09 17:23:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10624 states, 10623 states have (on average 4.260284288807305) internal successors, (45257), 10623 states have internal predecessors, (45257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10624 states to 10624 states and 45257 transitions. [2021-07-09 17:23:38,391 INFO L78 Accepts]: Start accepts. Automaton has 10624 states and 45257 transitions. Word has length 25 [2021-07-09 17:23:38,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:38,391 INFO L482 AbstractCegarLoop]: Abstraction has 10624 states and 45257 transitions. [2021-07-09 17:23:38,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:38,391 INFO L276 IsEmpty]: Start isEmpty. Operand 10624 states and 45257 transitions. [2021-07-09 17:23:38,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:23:38,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:38,413 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:38,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 17:23:38,621 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:38,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:38,621 INFO L82 PathProgramCache]: Analyzing trace with hash 284595889, now seen corresponding path program 12 times [2021-07-09 17:23:38,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:38,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743509822] [2021-07-09 17:23:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:38,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:38,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743509822] [2021-07-09 17:23:38,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743509822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:38,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197478587] [2021-07-09 17:23:38,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:38,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:23:38,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:38,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:23:38,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:38,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197478587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:38,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:38,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:23:38,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708394893] [2021-07-09 17:23:38,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:38,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:38,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:38,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:38,711 INFO L87 Difference]: Start difference. First operand 10624 states and 45257 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:38,918 INFO L93 Difference]: Finished difference Result 15510 states and 62671 transitions. [2021-07-09 17:23:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:23:38,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:23:38,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:38,967 INFO L225 Difference]: With dead ends: 15510 [2021-07-09 17:23:38,968 INFO L226 Difference]: Without dead ends: 15419 [2021-07-09 17:23:38,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:23:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15419 states. [2021-07-09 17:23:39,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15419 to 11124. [2021-07-09 17:23:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11124 states, 11123 states have (on average 4.2321316191674905) internal successors, (47074), 11123 states have internal predecessors, (47074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11124 states to 11124 states and 47074 transitions. [2021-07-09 17:23:39,345 INFO L78 Accepts]: Start accepts. Automaton has 11124 states and 47074 transitions. Word has length 25 [2021-07-09 17:23:39,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:39,345 INFO L482 AbstractCegarLoop]: Abstraction has 11124 states and 47074 transitions. [2021-07-09 17:23:39,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:39,345 INFO L276 IsEmpty]: Start isEmpty. Operand 11124 states and 47074 transitions. [2021-07-09 17:23:39,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:39,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:39,368 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:39,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:39,573 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:39,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:39,573 INFO L82 PathProgramCache]: Analyzing trace with hash 886244355, now seen corresponding path program 13 times [2021-07-09 17:23:39,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:39,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861302984] [2021-07-09 17:23:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:39,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:39,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861302984] [2021-07-09 17:23:39,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861302984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:39,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66768994] [2021-07-09 17:23:39,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:39,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:39,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:39,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66768994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:39,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:39,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-09 17:23:39,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101021780] [2021-07-09 17:23:39,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:39,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:39,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:39,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:39,780 INFO L87 Difference]: Start difference. First operand 11124 states and 47074 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:39,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:39,978 INFO L93 Difference]: Finished difference Result 12725 states and 52883 transitions. [2021-07-09 17:23:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:23:39,979 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:39,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:40,019 INFO L225 Difference]: With dead ends: 12725 [2021-07-09 17:23:40,019 INFO L226 Difference]: Without dead ends: 12657 [2021-07-09 17:23:40,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:40,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12657 states. [2021-07-09 17:23:40,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12657 to 11743. [2021-07-09 17:23:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11743 states, 11742 states have (on average 4.222619655935956) internal successors, (49582), 11742 states have internal predecessors, (49582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 49582 transitions. [2021-07-09 17:23:40,264 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 49582 transitions. Word has length 27 [2021-07-09 17:23:40,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:40,264 INFO L482 AbstractCegarLoop]: Abstraction has 11743 states and 49582 transitions. [2021-07-09 17:23:40,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 49582 transitions. [2021-07-09 17:23:40,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:40,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:40,288 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:40,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 17:23:40,495 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:40,495 INFO L82 PathProgramCache]: Analyzing trace with hash 853474367, now seen corresponding path program 14 times [2021-07-09 17:23:40,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:40,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411897583] [2021-07-09 17:23:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:23:40,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:40,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411897583] [2021-07-09 17:23:40,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411897583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:40,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405100614] [2021-07-09 17:23:40,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:40,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:40,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:40,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:40,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:40,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405100614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:40,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:40,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-07-09 17:23:40,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069276786] [2021-07-09 17:23:40,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:40,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:40,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:40,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:40,667 INFO L87 Difference]: Start difference. First operand 11743 states and 49582 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:40,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:40,923 INFO L93 Difference]: Finished difference Result 13435 states and 55712 transitions. [2021-07-09 17:23:40,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:23:40,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:40,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:40,970 INFO L225 Difference]: With dead ends: 13435 [2021-07-09 17:23:40,970 INFO L226 Difference]: Without dead ends: 13299 [2021-07-09 17:23:40,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:40,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2021-07-09 17:23:41,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 11989. [2021-07-09 17:23:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11989 states, 11988 states have (on average 4.226976976976977) internal successors, (50673), 11988 states have internal predecessors, (50673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11989 states to 11989 states and 50673 transitions. [2021-07-09 17:23:41,227 INFO L78 Accepts]: Start accepts. Automaton has 11989 states and 50673 transitions. Word has length 27 [2021-07-09 17:23:41,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:41,228 INFO L482 AbstractCegarLoop]: Abstraction has 11989 states and 50673 transitions. [2021-07-09 17:23:41,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:41,228 INFO L276 IsEmpty]: Start isEmpty. Operand 11989 states and 50673 transitions. [2021-07-09 17:23:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:41,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:41,253 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:41,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 17:23:41,453 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:41,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:41,453 INFO L82 PathProgramCache]: Analyzing trace with hash -122502081, now seen corresponding path program 1 times [2021-07-09 17:23:41,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:41,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36550321] [2021-07-09 17:23:41,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:41,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:41,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36550321] [2021-07-09 17:23:41,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36550321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:41,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710337153] [2021-07-09 17:23:41,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:41,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:41,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:41,657 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-09 17:23:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:41,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710337153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:41,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:41,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-07-09 17:23:41,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111411255] [2021-07-09 17:23:41,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:41,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:41,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:41,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:41,745 INFO L87 Difference]: Start difference. First operand 11989 states and 50673 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:42,032 INFO L93 Difference]: Finished difference Result 12852 states and 53545 transitions. [2021-07-09 17:23:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:23:42,032 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:42,071 INFO L225 Difference]: With dead ends: 12852 [2021-07-09 17:23:42,072 INFO L226 Difference]: Without dead ends: 12484 [2021-07-09 17:23:42,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:42,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-07-09 17:23:42,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 12212. [2021-07-09 17:23:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12212 states, 12211 states have (on average 4.207108344934895) internal successors, (51373), 12211 states have internal predecessors, (51373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12212 states to 12212 states and 51373 transitions. [2021-07-09 17:23:42,320 INFO L78 Accepts]: Start accepts. Automaton has 12212 states and 51373 transitions. Word has length 27 [2021-07-09 17:23:42,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:42,320 INFO L482 AbstractCegarLoop]: Abstraction has 12212 states and 51373 transitions. [2021-07-09 17:23:42,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:42,320 INFO L276 IsEmpty]: Start isEmpty. Operand 12212 states and 51373 transitions. [2021-07-09 17:23:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:42,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:42,345 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:42,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:23:42,546 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:42,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:42,546 INFO L82 PathProgramCache]: Analyzing trace with hash -824262133, now seen corresponding path program 2 times [2021-07-09 17:23:42,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:42,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302575007] [2021-07-09 17:23:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:42,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:42,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302575007] [2021-07-09 17:23:42,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302575007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:42,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886872053] [2021-07-09 17:23:42,581 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:42,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:42,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:42,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:42,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:42,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886872053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:42,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:42,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-07-09 17:23:42,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382112217] [2021-07-09 17:23:42,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:42,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:42,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:42,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:42,732 INFO L87 Difference]: Start difference. First operand 12212 states and 51373 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:42,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:42,943 INFO L93 Difference]: Finished difference Result 12962 states and 53969 transitions. [2021-07-09 17:23:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:23:42,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:42,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:42,983 INFO L225 Difference]: With dead ends: 12962 [2021-07-09 17:23:42,983 INFO L226 Difference]: Without dead ends: 12648 [2021-07-09 17:23:42,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12648 states. [2021-07-09 17:23:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12648 to 12240. [2021-07-09 17:23:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12240 states, 12239 states have (on average 4.2166026636163085) internal successors, (51607), 12239 states have internal predecessors, (51607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12240 states to 12240 states and 51607 transitions. [2021-07-09 17:23:43,227 INFO L78 Accepts]: Start accepts. Automaton has 12240 states and 51607 transitions. Word has length 27 [2021-07-09 17:23:43,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:43,227 INFO L482 AbstractCegarLoop]: Abstraction has 12240 states and 51607 transitions. [2021-07-09 17:23:43,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 12240 states and 51607 transitions. [2021-07-09 17:23:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:43,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:43,252 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:43,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 17:23:43,453 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:43,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1674500287, now seen corresponding path program 3 times [2021-07-09 17:23:43,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:43,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375833213] [2021-07-09 17:23:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:43,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:43,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375833213] [2021-07-09 17:23:43,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375833213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:43,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221402945] [2021-07-09 17:23:43,502 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:43,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:23:43,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:43,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:43,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:43,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221402945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:43,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:43,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-09 17:23:43,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164648275] [2021-07-09 17:23:43,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:43,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:43,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:43,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:43,631 INFO L87 Difference]: Start difference. First operand 12240 states and 51607 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:43,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:43,834 INFO L93 Difference]: Finished difference Result 12764 states and 53549 transitions. [2021-07-09 17:23:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:23:43,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:43,875 INFO L225 Difference]: With dead ends: 12764 [2021-07-09 17:23:43,875 INFO L226 Difference]: Without dead ends: 12616 [2021-07-09 17:23:43,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:43,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12616 states. [2021-07-09 17:23:44,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12616 to 12484. [2021-07-09 17:23:44,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12484 states, 12483 states have (on average 4.215893615316831) internal successors, (52627), 12483 states have internal predecessors, (52627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12484 states to 12484 states and 52627 transitions. [2021-07-09 17:23:44,193 INFO L78 Accepts]: Start accepts. Automaton has 12484 states and 52627 transitions. Word has length 27 [2021-07-09 17:23:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:44,193 INFO L482 AbstractCegarLoop]: Abstraction has 12484 states and 52627 transitions. [2021-07-09 17:23:44,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 12484 states and 52627 transitions. [2021-07-09 17:23:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:44,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:44,220 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:44,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:23:44,421 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:44,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:44,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1879740499, now seen corresponding path program 4 times [2021-07-09 17:23:44,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:44,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964759005] [2021-07-09 17:23:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:44,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:44,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964759005] [2021-07-09 17:23:44,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964759005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:44,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017653372] [2021-07-09 17:23:44,469 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:44,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:44,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:44,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:44,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:44,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017653372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:44,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:44,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-07-09 17:23:44,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771588814] [2021-07-09 17:23:44,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:44,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:44,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:44,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:44,584 INFO L87 Difference]: Start difference. First operand 12484 states and 52627 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:44,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:44,850 INFO L93 Difference]: Finished difference Result 13344 states and 55451 transitions. [2021-07-09 17:23:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:23:44,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:44,891 INFO L225 Difference]: With dead ends: 13344 [2021-07-09 17:23:44,892 INFO L226 Difference]: Without dead ends: 12916 [2021-07-09 17:23:44,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:44,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12916 states. [2021-07-09 17:23:45,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12916 to 12072. [2021-07-09 17:23:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12072 states, 12071 states have (on average 4.212327064866209) internal successors, (50847), 12071 states have internal predecessors, (50847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12072 states to 12072 states and 50847 transitions. [2021-07-09 17:23:45,148 INFO L78 Accepts]: Start accepts. Automaton has 12072 states and 50847 transitions. Word has length 27 [2021-07-09 17:23:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:45,148 INFO L482 AbstractCegarLoop]: Abstraction has 12072 states and 50847 transitions. [2021-07-09 17:23:45,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 12072 states and 50847 transitions. [2021-07-09 17:23:45,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:45,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:45,173 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:45,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:45,374 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:45,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:45,374 INFO L82 PathProgramCache]: Analyzing trace with hash -833402749, now seen corresponding path program 5 times [2021-07-09 17:23:45,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:45,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023537759] [2021-07-09 17:23:45,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:45,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:45,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023537759] [2021-07-09 17:23:45,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023537759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:45,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976065893] [2021-07-09 17:23:45,413 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:45,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:23:45,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:45,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:45,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:45,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976065893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:45,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:45,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-09 17:23:45,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725392809] [2021-07-09 17:23:45,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:45,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:45,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:45,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:45,526 INFO L87 Difference]: Start difference. First operand 12072 states and 50847 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:45,709 INFO L93 Difference]: Finished difference Result 12692 states and 53003 transitions. [2021-07-09 17:23:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:23:45,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:45,749 INFO L225 Difference]: With dead ends: 12692 [2021-07-09 17:23:45,749 INFO L226 Difference]: Without dead ends: 12544 [2021-07-09 17:23:45,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:45,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12544 states. [2021-07-09 17:23:45,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12544 to 12224. [2021-07-09 17:23:45,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12224 states, 12223 states have (on average 4.211813793667676) internal successors, (51481), 12223 states have internal predecessors, (51481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:46,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12224 states to 12224 states and 51481 transitions. [2021-07-09 17:23:46,002 INFO L78 Accepts]: Start accepts. Automaton has 12224 states and 51481 transitions. Word has length 27 [2021-07-09 17:23:46,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:46,002 INFO L482 AbstractCegarLoop]: Abstraction has 12224 states and 51481 transitions. [2021-07-09 17:23:46,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:46,002 INFO L276 IsEmpty]: Start isEmpty. Operand 12224 states and 51481 transitions. [2021-07-09 17:23:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:46,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:46,137 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:46,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 17:23:46,338 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:46,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:46,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1371995579, now seen corresponding path program 6 times [2021-07-09 17:23:46,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:46,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426103290] [2021-07-09 17:23:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:46,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:46,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426103290] [2021-07-09 17:23:46,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426103290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:46,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274745997] [2021-07-09 17:23:46,383 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:46,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:46,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:46,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:46,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:46,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274745997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:46,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:46,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-07-09 17:23:46,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299678785] [2021-07-09 17:23:46,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:46,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:46,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:46,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:46,524 INFO L87 Difference]: Start difference. First operand 12224 states and 51481 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:46,804 INFO L93 Difference]: Finished difference Result 13227 states and 54835 transitions. [2021-07-09 17:23:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:23:46,804 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:46,855 INFO L225 Difference]: With dead ends: 13227 [2021-07-09 17:23:46,855 INFO L226 Difference]: Without dead ends: 12883 [2021-07-09 17:23:46,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12883 states. [2021-07-09 17:23:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12883 to 12275. [2021-07-09 17:23:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12275 states, 12274 states have (on average 4.194150236271794) internal successors, (51479), 12274 states have internal predecessors, (51479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12275 states to 12275 states and 51479 transitions. [2021-07-09 17:23:47,168 INFO L78 Accepts]: Start accepts. Automaton has 12275 states and 51479 transitions. Word has length 27 [2021-07-09 17:23:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:47,168 INFO L482 AbstractCegarLoop]: Abstraction has 12275 states and 51479 transitions. [2021-07-09 17:23:47,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 12275 states and 51479 transitions. [2021-07-09 17:23:47,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:47,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:47,196 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:47,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:23:47,396 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:47,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:47,397 INFO L82 PathProgramCache]: Analyzing trace with hash -980525761, now seen corresponding path program 7 times [2021-07-09 17:23:47,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:47,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292108128] [2021-07-09 17:23:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:23:47,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:47,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292108128] [2021-07-09 17:23:47,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292108128] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:23:47,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:23:47,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:23:47,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859118104] [2021-07-09 17:23:47,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:23:47,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:47,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:23:47,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:47,436 INFO L87 Difference]: Start difference. First operand 12275 states and 51479 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:47,607 INFO L93 Difference]: Finished difference Result 12977 states and 53915 transitions. [2021-07-09 17:23:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:23:47,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:47,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:47,655 INFO L225 Difference]: With dead ends: 12977 [2021-07-09 17:23:47,655 INFO L226 Difference]: Without dead ends: 12779 [2021-07-09 17:23:47,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:23:47,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12779 states. [2021-07-09 17:23:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12779 to 12283. [2021-07-09 17:23:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12283 states, 12282 states have (on average 4.204934049829018) internal successors, (51645), 12282 states have internal predecessors, (51645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12283 states to 12283 states and 51645 transitions. [2021-07-09 17:23:47,974 INFO L78 Accepts]: Start accepts. Automaton has 12283 states and 51645 transitions. Word has length 27 [2021-07-09 17:23:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:47,974 INFO L482 AbstractCegarLoop]: Abstraction has 12283 states and 51645 transitions. [2021-07-09 17:23:47,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 12283 states and 51645 transitions. [2021-07-09 17:23:48,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:48,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:48,000 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:48,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-07-09 17:23:48,001 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:48,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:48,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1155883921, now seen corresponding path program 8 times [2021-07-09 17:23:48,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:48,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715739612] [2021-07-09 17:23:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:48,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:48,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715739612] [2021-07-09 17:23:48,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715739612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:48,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829647094] [2021-07-09 17:23:48,039 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:23:48,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:48,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:48,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:48,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:48,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829647094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:48,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:48,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-09 17:23:48,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038077283] [2021-07-09 17:23:48,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:48,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:48,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:48,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:48,196 INFO L87 Difference]: Start difference. First operand 12283 states and 51645 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:48,503 INFO L93 Difference]: Finished difference Result 12839 states and 53665 transitions. [2021-07-09 17:23:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:23:48,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:48,547 INFO L225 Difference]: With dead ends: 12839 [2021-07-09 17:23:48,548 INFO L226 Difference]: Without dead ends: 12707 [2021-07-09 17:23:48,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:48,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12707 states. [2021-07-09 17:23:48,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12707 to 12503. [2021-07-09 17:23:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12503 states, 12502 states have (on average 4.2051671732522795) internal successors, (52573), 12502 states have internal predecessors, (52573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12503 states to 12503 states and 52573 transitions. [2021-07-09 17:23:48,950 INFO L78 Accepts]: Start accepts. Automaton has 12503 states and 52573 transitions. Word has length 27 [2021-07-09 17:23:48,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:48,950 INFO L482 AbstractCegarLoop]: Abstraction has 12503 states and 52573 transitions. [2021-07-09 17:23:48,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 12503 states and 52573 transitions. [2021-07-09 17:23:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:48,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:48,979 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:49,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:49,179 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:49,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1821247349, now seen corresponding path program 9 times [2021-07-09 17:23:49,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:49,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847145776] [2021-07-09 17:23:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:23:49,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:49,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847145776] [2021-07-09 17:23:49,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847145776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:49,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887411324] [2021-07-09 17:23:49,221 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:49,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:23:49,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:49,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:49,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:49,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887411324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:49,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:49,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-07-09 17:23:49,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844351531] [2021-07-09 17:23:49,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:49,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:49,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:49,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:49,335 INFO L87 Difference]: Start difference. First operand 12503 states and 52573 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:49,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:49,616 INFO L93 Difference]: Finished difference Result 13523 states and 55911 transitions. [2021-07-09 17:23:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:23:49,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:49,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:49,659 INFO L225 Difference]: With dead ends: 13523 [2021-07-09 17:23:49,660 INFO L226 Difference]: Without dead ends: 13127 [2021-07-09 17:23:49,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2021-07-09 17:23:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 12123. [2021-07-09 17:23:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12123 states, 12122 states have (on average 4.2003794753341035) internal successors, (50917), 12122 states have internal predecessors, (50917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:49,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12123 states to 12123 states and 50917 transitions. [2021-07-09 17:23:49,909 INFO L78 Accepts]: Start accepts. Automaton has 12123 states and 50917 transitions. Word has length 27 [2021-07-09 17:23:49,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:49,909 INFO L482 AbstractCegarLoop]: Abstraction has 12123 states and 50917 transitions. [2021-07-09 17:23:49,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:49,909 INFO L276 IsEmpty]: Start isEmpty. Operand 12123 states and 50917 transitions. [2021-07-09 17:23:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:49,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:49,934 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:50,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 17:23:50,135 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:50,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:50,135 INFO L82 PathProgramCache]: Analyzing trace with hash -806226241, now seen corresponding path program 15 times [2021-07-09 17:23:50,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:50,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843899061] [2021-07-09 17:23:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:23:50,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:50,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843899061] [2021-07-09 17:23:50,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843899061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:50,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013418075] [2021-07-09 17:23:50,164 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:50,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:23:50,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:50,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:50,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:50,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013418075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:50,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:50,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-09 17:23:50,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527777178] [2021-07-09 17:23:50,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:50,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:50,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:50,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:50,282 INFO L87 Difference]: Start difference. First operand 12123 states and 50917 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:50,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:50,507 INFO L93 Difference]: Finished difference Result 13671 states and 56537 transitions. [2021-07-09 17:23:50,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:23:50,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:50,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:50,561 INFO L225 Difference]: With dead ends: 13671 [2021-07-09 17:23:50,561 INFO L226 Difference]: Without dead ends: 13603 [2021-07-09 17:23:50,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13603 states. [2021-07-09 17:23:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13603 to 12633. [2021-07-09 17:23:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12633 states, 12632 states have (on average 4.193635212159594) internal successors, (52974), 12632 states have internal predecessors, (52974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12633 states to 12633 states and 52974 transitions. [2021-07-09 17:23:50,843 INFO L78 Accepts]: Start accepts. Automaton has 12633 states and 52974 transitions. Word has length 27 [2021-07-09 17:23:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:50,843 INFO L482 AbstractCegarLoop]: Abstraction has 12633 states and 52974 transitions. [2021-07-09 17:23:50,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 12633 states and 52974 transitions. [2021-07-09 17:23:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:50,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:50,872 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:51,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:51,072 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:51,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1315696619, now seen corresponding path program 13 times [2021-07-09 17:23:51,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:51,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931554962] [2021-07-09 17:23:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:51,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:51,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931554962] [2021-07-09 17:23:51,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931554962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:51,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345400630] [2021-07-09 17:23:51,101 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:51,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:51,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:51,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345400630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:51,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:51,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-09 17:23:51,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405274105] [2021-07-09 17:23:51,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:51,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:51,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:51,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:51,197 INFO L87 Difference]: Start difference. First operand 12633 states and 52974 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:51,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:51,403 INFO L93 Difference]: Finished difference Result 13876 states and 57371 transitions. [2021-07-09 17:23:51,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:23:51,403 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:51,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:51,448 INFO L225 Difference]: With dead ends: 13876 [2021-07-09 17:23:51,448 INFO L226 Difference]: Without dead ends: 13825 [2021-07-09 17:23:51,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:51,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2021-07-09 17:23:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 13229. [2021-07-09 17:23:51,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13229 states, 13228 states have (on average 4.175839129120049) internal successors, (55238), 13228 states have internal predecessors, (55238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:51,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13229 states to 13229 states and 55238 transitions. [2021-07-09 17:23:51,747 INFO L78 Accepts]: Start accepts. Automaton has 13229 states and 55238 transitions. Word has length 27 [2021-07-09 17:23:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:51,747 INFO L482 AbstractCegarLoop]: Abstraction has 13229 states and 55238 transitions. [2021-07-09 17:23:51,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 13229 states and 55238 transitions. [2021-07-09 17:23:51,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:51,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:51,777 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:51,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 17:23:51,977 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:51,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:51,978 INFO L82 PathProgramCache]: Analyzing trace with hash 530281439, now seen corresponding path program 14 times [2021-07-09 17:23:51,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:51,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817613235] [2021-07-09 17:23:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:23:52,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:52,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817613235] [2021-07-09 17:23:52,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817613235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:52,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294918750] [2021-07-09 17:23:52,028 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:52,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:52,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:52,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:52,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:52,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294918750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:52,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:52,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-07-09 17:23:52,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743473840] [2021-07-09 17:23:52,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:23:52,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:52,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:23:52,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:52,140 INFO L87 Difference]: Start difference. First operand 13229 states and 55238 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:52,379 INFO L93 Difference]: Finished difference Result 14694 states and 60468 transitions. [2021-07-09 17:23:52,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:23:52,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:52,427 INFO L225 Difference]: With dead ends: 14694 [2021-07-09 17:23:52,427 INFO L226 Difference]: Without dead ends: 14592 [2021-07-09 17:23:52,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:23:52,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14592 states. [2021-07-09 17:23:52,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14592 to 13580. [2021-07-09 17:23:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13580 states, 13579 states have (on average 4.172472199720156) internal successors, (56658), 13579 states have internal predecessors, (56658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13580 states to 13580 states and 56658 transitions. [2021-07-09 17:23:52,728 INFO L78 Accepts]: Start accepts. Automaton has 13580 states and 56658 transitions. Word has length 27 [2021-07-09 17:23:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:52,728 INFO L482 AbstractCegarLoop]: Abstraction has 13580 states and 56658 transitions. [2021-07-09 17:23:52,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 13580 states and 56658 transitions. [2021-07-09 17:23:52,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:23:52,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:52,878 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:53,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 17:23:53,081 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:53,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1257062111, now seen corresponding path program 15 times [2021-07-09 17:23:53,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:53,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253265043] [2021-07-09 17:23:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:23:53,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:53,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253265043] [2021-07-09 17:23:53,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253265043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:53,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289212716] [2021-07-09 17:23:53,125 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:53,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:23:53,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:53,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:23:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:53,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289212716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:53,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:53,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-09 17:23:53,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982052612] [2021-07-09 17:23:53,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:23:53,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:53,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:23:53,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:53,239 INFO L87 Difference]: Start difference. First operand 13580 states and 56658 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:53,455 INFO L93 Difference]: Finished difference Result 14707 states and 60689 transitions. [2021-07-09 17:23:53,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:23:53,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:23:53,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:53,501 INFO L225 Difference]: With dead ends: 14707 [2021-07-09 17:23:53,501 INFO L226 Difference]: Without dead ends: 14656 [2021-07-09 17:23:53,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:23:53,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14656 states. [2021-07-09 17:23:53,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14656 to 14011. [2021-07-09 17:23:53,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14011 states, 14010 states have (on average 4.164596716630978) internal successors, (58346), 14010 states have internal predecessors, (58346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14011 states to 14011 states and 58346 transitions. [2021-07-09 17:23:53,801 INFO L78 Accepts]: Start accepts. Automaton has 14011 states and 58346 transitions. Word has length 27 [2021-07-09 17:23:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:53,801 INFO L482 AbstractCegarLoop]: Abstraction has 14011 states and 58346 transitions. [2021-07-09 17:23:53,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 14011 states and 58346 transitions. [2021-07-09 17:23:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:23:53,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:53,832 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:54,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 17:23:54,032 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:54,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:54,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1381235451, now seen corresponding path program 16 times [2021-07-09 17:23:54,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:54,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324357837] [2021-07-09 17:23:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:54,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:54,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324357837] [2021-07-09 17:23:54,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324357837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:54,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387578098] [2021-07-09 17:23:54,063 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:54,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:54,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:54,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:23:54,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:54,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387578098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:54,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:54,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:23:54,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282303241] [2021-07-09 17:23:54,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:54,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:54,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:54,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:54,178 INFO L87 Difference]: Start difference. First operand 14011 states and 58346 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:55,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:55,314 INFO L93 Difference]: Finished difference Result 35846 states and 143690 transitions. [2021-07-09 17:23:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:23:55,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:23:55,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:55,444 INFO L225 Difference]: With dead ends: 35846 [2021-07-09 17:23:55,444 INFO L226 Difference]: Without dead ends: 35846 [2021-07-09 17:23:55,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 435.3ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:23:55,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35846 states. [2021-07-09 17:23:55,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35846 to 13413. [2021-07-09 17:23:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13413 states, 13412 states have (on average 4.137339695794811) internal successors, (55490), 13412 states have internal predecessors, (55490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:55,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13413 states to 13413 states and 55490 transitions. [2021-07-09 17:23:55,934 INFO L78 Accepts]: Start accepts. Automaton has 13413 states and 55490 transitions. Word has length 29 [2021-07-09 17:23:55,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:55,935 INFO L482 AbstractCegarLoop]: Abstraction has 13413 states and 55490 transitions. [2021-07-09 17:23:55,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:55,935 INFO L276 IsEmpty]: Start isEmpty. Operand 13413 states and 55490 transitions. [2021-07-09 17:23:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:23:55,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:55,965 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:56,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 17:23:56,167 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:56,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:56,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1140848389, now seen corresponding path program 17 times [2021-07-09 17:23:56,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:56,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054575104] [2021-07-09 17:23:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:56,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:56,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054575104] [2021-07-09 17:23:56,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054575104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:56,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609734709] [2021-07-09 17:23:56,211 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:56,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:23:56,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:56,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:23:56,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:56,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609734709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:56,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:56,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:23:56,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925579684] [2021-07-09 17:23:56,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:23:56,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:56,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:23:56,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:23:56,320 INFO L87 Difference]: Start difference. First operand 13413 states and 55490 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:56,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:56,889 INFO L93 Difference]: Finished difference Result 29402 states and 114209 transitions. [2021-07-09 17:23:56,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:23:56,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:23:56,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:56,988 INFO L225 Difference]: With dead ends: 29402 [2021-07-09 17:23:56,988 INFO L226 Difference]: Without dead ends: 29122 [2021-07-09 17:23:56,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 270.7ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:23:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29122 states. [2021-07-09 17:23:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29122 to 16597. [2021-07-09 17:23:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16597 states, 16596 states have (on average 4.1867317425885755) internal successors, (69483), 16596 states have internal predecessors, (69483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16597 states to 16597 states and 69483 transitions. [2021-07-09 17:23:57,565 INFO L78 Accepts]: Start accepts. Automaton has 16597 states and 69483 transitions. Word has length 29 [2021-07-09 17:23:57,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:57,565 INFO L482 AbstractCegarLoop]: Abstraction has 16597 states and 69483 transitions. [2021-07-09 17:23:57,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 16597 states and 69483 transitions. [2021-07-09 17:23:57,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:23:57,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:57,600 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:57,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:57,801 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:57,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:57,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1632929023, now seen corresponding path program 18 times [2021-07-09 17:23:57,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:57,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187365608] [2021-07-09 17:23:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:57,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:57,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187365608] [2021-07-09 17:23:57,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187365608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:57,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331187745] [2021-07-09 17:23:57,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:57,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:57,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:57,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:23:57,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:57,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331187745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:57,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:57,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:23:57,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857158658] [2021-07-09 17:23:57,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:23:57,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:57,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:23:57,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:57,924 INFO L87 Difference]: Start difference. First operand 16597 states and 69483 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:58,472 INFO L93 Difference]: Finished difference Result 29479 states and 115492 transitions. [2021-07-09 17:23:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:23:58,473 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:23:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:58,583 INFO L225 Difference]: With dead ends: 29479 [2021-07-09 17:23:58,583 INFO L226 Difference]: Without dead ends: 29479 [2021-07-09 17:23:58,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:23:58,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29479 states. [2021-07-09 17:23:59,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29479 to 16486. [2021-07-09 17:23:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16486 states, 16485 states have (on average 4.176038823172581) internal successors, (68842), 16485 states have internal predecessors, (68842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16486 states to 16486 states and 68842 transitions. [2021-07-09 17:23:59,104 INFO L78 Accepts]: Start accepts. Automaton has 16486 states and 68842 transitions. Word has length 29 [2021-07-09 17:23:59,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:59,104 INFO L482 AbstractCegarLoop]: Abstraction has 16486 states and 68842 transitions. [2021-07-09 17:23:59,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 16486 states and 68842 transitions. [2021-07-09 17:23:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:23:59,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:59,140 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:59,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 17:23:59,341 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:59,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:59,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1186318147, now seen corresponding path program 19 times [2021-07-09 17:23:59,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:59,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798446378] [2021-07-09 17:23:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:59,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:59,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798446378] [2021-07-09 17:23:59,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798446378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:59,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115346227] [2021-07-09 17:23:59,366 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:59,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:23:59,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:59,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115346227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:59,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:59,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:23:59,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371310542] [2021-07-09 17:23:59,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:23:59,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:59,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:23:59,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:23:59,473 INFO L87 Difference]: Start difference. First operand 16486 states and 68842 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:59,867 INFO L93 Difference]: Finished difference Result 21742 states and 87217 transitions. [2021-07-09 17:23:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:23:59,867 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:23:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:59,934 INFO L225 Difference]: With dead ends: 21742 [2021-07-09 17:23:59,935 INFO L226 Difference]: Without dead ends: 21722 [2021-07-09 17:23:59,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:23:59,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21722 states. [2021-07-09 17:24:00,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21722 to 16564. [2021-07-09 17:24:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16564 states, 16563 states have (on average 4.172372154802874) internal successors, (69107), 16563 states have internal predecessors, (69107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16564 states to 16564 states and 69107 transitions. [2021-07-09 17:24:00,369 INFO L78 Accepts]: Start accepts. Automaton has 16564 states and 69107 transitions. Word has length 29 [2021-07-09 17:24:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:00,369 INFO L482 AbstractCegarLoop]: Abstraction has 16564 states and 69107 transitions. [2021-07-09 17:24:00,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 16564 states and 69107 transitions. [2021-07-09 17:24:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:00,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:00,405 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:00,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:00,605 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:00,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:00,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1221261249, now seen corresponding path program 20 times [2021-07-09 17:24:00,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:00,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419133150] [2021-07-09 17:24:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:00,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419133150] [2021-07-09 17:24:00,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419133150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107536902] [2021-07-09 17:24:00,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:00,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:00,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:00,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:00,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:00,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107536902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:00,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:00,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:24:00,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501077411] [2021-07-09 17:24:00,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:00,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:00,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:00,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:00,728 INFO L87 Difference]: Start difference. First operand 16564 states and 69107 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:01,486 INFO L93 Difference]: Finished difference Result 55537 states and 222253 transitions. [2021-07-09 17:24:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:24:01,486 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:01,712 INFO L225 Difference]: With dead ends: 55537 [2021-07-09 17:24:01,712 INFO L226 Difference]: Without dead ends: 55537 [2021-07-09 17:24:01,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:24:01,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55537 states. [2021-07-09 17:24:02,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55537 to 21381. [2021-07-09 17:24:02,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21381 states, 21380 states have (on average 4.286623012160898) internal successors, (91648), 21380 states have internal predecessors, (91648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21381 states to 21381 states and 91648 transitions. [2021-07-09 17:24:02,560 INFO L78 Accepts]: Start accepts. Automaton has 21381 states and 91648 transitions. Word has length 29 [2021-07-09 17:24:02,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:02,561 INFO L482 AbstractCegarLoop]: Abstraction has 21381 states and 91648 transitions. [2021-07-09 17:24:02,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:02,561 INFO L276 IsEmpty]: Start isEmpty. Operand 21381 states and 91648 transitions. [2021-07-09 17:24:02,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:02,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:02,608 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:02,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:02,809 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:02,809 INFO L82 PathProgramCache]: Analyzing trace with hash -286339007, now seen corresponding path program 21 times [2021-07-09 17:24:02,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:02,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830703906] [2021-07-09 17:24:02,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:02,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:02,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830703906] [2021-07-09 17:24:02,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830703906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:02,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744732587] [2021-07-09 17:24:02,848 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:02,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:24:02,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:02,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:02,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:02,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744732587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:02,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:02,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:24:02,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83771250] [2021-07-09 17:24:02,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:02,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:02,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:02,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:02,945 INFO L87 Difference]: Start difference. First operand 21381 states and 91648 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:03,551 INFO L93 Difference]: Finished difference Result 35555 states and 142585 transitions. [2021-07-09 17:24:03,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:24:03,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:03,677 INFO L225 Difference]: With dead ends: 35555 [2021-07-09 17:24:03,677 INFO L226 Difference]: Without dead ends: 35499 [2021-07-09 17:24:03,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:24:03,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35499 states. [2021-07-09 17:24:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35499 to 21381. [2021-07-09 17:24:04,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21381 states, 21380 states have (on average 4.286155285313377) internal successors, (91638), 21380 states have internal predecessors, (91638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21381 states to 21381 states and 91638 transitions. [2021-07-09 17:24:04,338 INFO L78 Accepts]: Start accepts. Automaton has 21381 states and 91638 transitions. Word has length 29 [2021-07-09 17:24:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:04,338 INFO L482 AbstractCegarLoop]: Abstraction has 21381 states and 91638 transitions. [2021-07-09 17:24:04,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 21381 states and 91638 transitions. [2021-07-09 17:24:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:04,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:04,388 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:04,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 17:24:04,590 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:04,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1345291587, now seen corresponding path program 22 times [2021-07-09 17:24:04,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:04,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259564229] [2021-07-09 17:24:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:04,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:04,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259564229] [2021-07-09 17:24:04,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259564229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:04,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528116803] [2021-07-09 17:24:04,620 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:04,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:04,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:04,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:04,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:04,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528116803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:04,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:04,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:24:04,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066972649] [2021-07-09 17:24:04,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:04,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:04,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:04,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:04,723 INFO L87 Difference]: Start difference. First operand 21381 states and 91638 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:05,561 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-07-09 17:24:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:05,998 INFO L93 Difference]: Finished difference Result 42043 states and 168835 transitions. [2021-07-09 17:24:05,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:24:05,999 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:05,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:06,276 INFO L225 Difference]: With dead ends: 42043 [2021-07-09 17:24:06,277 INFO L226 Difference]: Without dead ends: 42043 [2021-07-09 17:24:06,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:24:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42043 states. [2021-07-09 17:24:06,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42043 to 21474. [2021-07-09 17:24:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21474 states, 21473 states have (on average 4.284776230615191) internal successors, (92007), 21473 states have internal predecessors, (92007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:07,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21474 states to 21474 states and 92007 transitions. [2021-07-09 17:24:07,105 INFO L78 Accepts]: Start accepts. Automaton has 21474 states and 92007 transitions. Word has length 29 [2021-07-09 17:24:07,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:07,105 INFO L482 AbstractCegarLoop]: Abstraction has 21474 states and 92007 transitions. [2021-07-09 17:24:07,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:07,105 INFO L276 IsEmpty]: Start isEmpty. Operand 21474 states and 92007 transitions. [2021-07-09 17:24:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:07,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:07,158 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:07,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:07,358 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:07,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:07,359 INFO L82 PathProgramCache]: Analyzing trace with hash -898680711, now seen corresponding path program 23 times [2021-07-09 17:24:07,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:07,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065440085] [2021-07-09 17:24:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:07,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:07,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065440085] [2021-07-09 17:24:07,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065440085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:07,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349669999] [2021-07-09 17:24:07,383 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:07,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:24:07,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:07,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:07,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:07,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349669999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:07,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:07,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:24:07,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634169583] [2021-07-09 17:24:07,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:07,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:07,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:07,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:07,494 INFO L87 Difference]: Start difference. First operand 21474 states and 92007 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:08,301 INFO L93 Difference]: Finished difference Result 42315 states and 169746 transitions. [2021-07-09 17:24:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:24:08,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:08,475 INFO L225 Difference]: With dead ends: 42315 [2021-07-09 17:24:08,475 INFO L226 Difference]: Without dead ends: 42275 [2021-07-09 17:24:08,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:08,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42275 states. [2021-07-09 17:24:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42275 to 21484. [2021-07-09 17:24:09,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21484 states, 21483 states have (on average 4.284038542103058) internal successors, (92034), 21483 states have internal predecessors, (92034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21484 states to 21484 states and 92034 transitions. [2021-07-09 17:24:09,351 INFO L78 Accepts]: Start accepts. Automaton has 21484 states and 92034 transitions. Word has length 29 [2021-07-09 17:24:09,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:09,351 INFO L482 AbstractCegarLoop]: Abstraction has 21484 states and 92034 transitions. [2021-07-09 17:24:09,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:09,351 INFO L276 IsEmpty]: Start isEmpty. Operand 21484 states and 92034 transitions. [2021-07-09 17:24:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:09,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:09,403 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:09,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 17:24:09,604 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1614038015, now seen corresponding path program 24 times [2021-07-09 17:24:09,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:09,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434313857] [2021-07-09 17:24:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:09,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:09,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434313857] [2021-07-09 17:24:09,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434313857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:09,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368068228] [2021-07-09 17:24:09,640 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:09,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:24:09,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:09,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:09,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:09,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368068228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:09,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:09,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:24:09,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679783346] [2021-07-09 17:24:09,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:09,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:09,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:09,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:09,742 INFO L87 Difference]: Start difference. First operand 21484 states and 92034 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:09,982 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-07-09 17:24:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:10,672 INFO L93 Difference]: Finished difference Result 36111 states and 146587 transitions. [2021-07-09 17:24:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:10,673 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:10,829 INFO L225 Difference]: With dead ends: 36111 [2021-07-09 17:24:10,829 INFO L226 Difference]: Without dead ends: 36111 [2021-07-09 17:24:10,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:24:10,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36111 states. [2021-07-09 17:24:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36111 to 20508. [2021-07-09 17:24:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20508 states, 20507 states have (on average 4.257131711123031) internal successors, (87301), 20507 states have internal predecessors, (87301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20508 states to 20508 states and 87301 transitions. [2021-07-09 17:24:11,657 INFO L78 Accepts]: Start accepts. Automaton has 20508 states and 87301 transitions. Word has length 29 [2021-07-09 17:24:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:11,657 INFO L482 AbstractCegarLoop]: Abstraction has 20508 states and 87301 transitions. [2021-07-09 17:24:11,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 20508 states and 87301 transitions. [2021-07-09 17:24:11,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:11,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:11,703 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:11,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:11,904 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:11,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:11,904 INFO L82 PathProgramCache]: Analyzing trace with hash 845683295, now seen corresponding path program 25 times [2021-07-09 17:24:11,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:11,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032930672] [2021-07-09 17:24:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:11,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:11,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032930672] [2021-07-09 17:24:11,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032930672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:11,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348157915] [2021-07-09 17:24:11,932 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:11,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:11,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:12,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348157915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:12,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:12,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:24:12,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266349366] [2021-07-09 17:24:12,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:12,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:12,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:12,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:12,030 INFO L87 Difference]: Start difference. First operand 20508 states and 87301 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:12,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:12,695 INFO L93 Difference]: Finished difference Result 36261 states and 145187 transitions. [2021-07-09 17:24:12,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:24:12,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:12,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:12,821 INFO L225 Difference]: With dead ends: 36261 [2021-07-09 17:24:12,821 INFO L226 Difference]: Without dead ends: 36201 [2021-07-09 17:24:12,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:12,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36201 states. [2021-07-09 17:24:13,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36201 to 20844. [2021-07-09 17:24:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20844 states, 20843 states have (on average 4.25269874778103) internal successors, (88639), 20843 states have internal predecessors, (88639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20844 states to 20844 states and 88639 transitions. [2021-07-09 17:24:13,733 INFO L78 Accepts]: Start accepts. Automaton has 20844 states and 88639 transitions. Word has length 29 [2021-07-09 17:24:13,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:13,733 INFO L482 AbstractCegarLoop]: Abstraction has 20844 states and 88639 transitions. [2021-07-09 17:24:13,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,733 INFO L276 IsEmpty]: Start isEmpty. Operand 20844 states and 88639 transitions. [2021-07-09 17:24:13,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:13,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:13,779 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:13,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 17:24:13,980 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:13,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:13,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1550654085, now seen corresponding path program 26 times [2021-07-09 17:24:13,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:13,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938037753] [2021-07-09 17:24:13,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:14,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:14,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938037753] [2021-07-09 17:24:14,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938037753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:14,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001904770] [2021-07-09 17:24:14,010 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:24:14,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:14,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:14,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:14,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001904770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:14,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:14,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:24:14,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138023322] [2021-07-09 17:24:14,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:14,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:14,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:14,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:14,110 INFO L87 Difference]: Start difference. First operand 20844 states and 88639 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:15,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:15,004 INFO L93 Difference]: Finished difference Result 44495 states and 179467 transitions. [2021-07-09 17:24:15,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:15,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:15,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:15,175 INFO L225 Difference]: With dead ends: 44495 [2021-07-09 17:24:15,176 INFO L226 Difference]: Without dead ends: 44495 [2021-07-09 17:24:15,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 254.1ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:24:15,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44495 states. [2021-07-09 17:24:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44495 to 20105. [2021-07-09 17:24:16,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20105 states, 20104 states have (on average 4.225875447672105) internal successors, (84957), 20104 states have internal predecessors, (84957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:16,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20105 states to 20105 states and 84957 transitions. [2021-07-09 17:24:16,122 INFO L78 Accepts]: Start accepts. Automaton has 20105 states and 84957 transitions. Word has length 29 [2021-07-09 17:24:16,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:16,123 INFO L482 AbstractCegarLoop]: Abstraction has 20105 states and 84957 transitions. [2021-07-09 17:24:16,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:16,123 INFO L276 IsEmpty]: Start isEmpty. Operand 20105 states and 84957 transitions. [2021-07-09 17:24:16,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:16,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:16,169 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:16,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 17:24:16,370 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:16,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:16,370 INFO L82 PathProgramCache]: Analyzing trace with hash 150786821, now seen corresponding path program 27 times [2021-07-09 17:24:16,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:16,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810633899] [2021-07-09 17:24:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:16,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:16,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810633899] [2021-07-09 17:24:16,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810633899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:16,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348628939] [2021-07-09 17:24:16,401 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:16,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:24:16,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:16,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:16,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:16,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348628939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:16,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:16,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 17:24:16,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443312790] [2021-07-09 17:24:16,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:16,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:16,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:16,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:16,527 INFO L87 Difference]: Start difference. First operand 20105 states and 84957 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:17,240 INFO L93 Difference]: Finished difference Result 29398 states and 116855 transitions. [2021-07-09 17:24:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:24:17,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:17,345 INFO L225 Difference]: With dead ends: 29398 [2021-07-09 17:24:17,345 INFO L226 Difference]: Without dead ends: 29314 [2021-07-09 17:24:17,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29314 states. [2021-07-09 17:24:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29314 to 19357. [2021-07-09 17:24:17,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19357 states, 19356 states have (on average 4.232434387270097) internal successors, (81923), 19356 states have internal predecessors, (81923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19357 states to 19357 states and 81923 transitions. [2021-07-09 17:24:17,926 INFO L78 Accepts]: Start accepts. Automaton has 19357 states and 81923 transitions. Word has length 29 [2021-07-09 17:24:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:17,926 INFO L482 AbstractCegarLoop]: Abstraction has 19357 states and 81923 transitions. [2021-07-09 17:24:17,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 19357 states and 81923 transitions. [2021-07-09 17:24:17,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:17,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:17,969 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:18,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 17:24:18,169 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:18,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:18,170 INFO L82 PathProgramCache]: Analyzing trace with hash -318156223, now seen corresponding path program 28 times [2021-07-09 17:24:18,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:18,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292727786] [2021-07-09 17:24:18,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:18,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:18,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292727786] [2021-07-09 17:24:18,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292727786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:18,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050051868] [2021-07-09 17:24:18,193 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:18,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:18,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:18,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:18,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:18,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050051868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:18,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:18,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:24:18,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769132245] [2021-07-09 17:24:18,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:18,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:18,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:18,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:18,308 INFO L87 Difference]: Start difference. First operand 19357 states and 81923 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:19,022 INFO L93 Difference]: Finished difference Result 39779 states and 158195 transitions. [2021-07-09 17:24:19,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:24:19,023 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:19,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:19,161 INFO L225 Difference]: With dead ends: 39779 [2021-07-09 17:24:19,162 INFO L226 Difference]: Without dead ends: 39779 [2021-07-09 17:24:19,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:19,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39779 states. [2021-07-09 17:24:20,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39779 to 20557. [2021-07-09 17:24:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20557 states, 20556 states have (on average 4.262502432379841) internal successors, (87620), 20556 states have internal predecessors, (87620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20557 states to 20557 states and 87620 transitions. [2021-07-09 17:24:20,124 INFO L78 Accepts]: Start accepts. Automaton has 20557 states and 87620 transitions. Word has length 29 [2021-07-09 17:24:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:20,125 INFO L482 AbstractCegarLoop]: Abstraction has 20557 states and 87620 transitions. [2021-07-09 17:24:20,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 20557 states and 87620 transitions. [2021-07-09 17:24:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:20,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:20,169 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:20,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 17:24:20,370 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:20,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:20,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1825756479, now seen corresponding path program 29 times [2021-07-09 17:24:20,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:20,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524100105] [2021-07-09 17:24:20,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:20,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:20,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524100105] [2021-07-09 17:24:20,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524100105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:20,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133353694] [2021-07-09 17:24:20,400 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:20,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:24:20,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:20,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:20,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:20,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133353694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:20,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:20,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:24:20,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142641382] [2021-07-09 17:24:20,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:20,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:20,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:20,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:20,500 INFO L87 Difference]: Start difference. First operand 20557 states and 87620 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:21,163 INFO L93 Difference]: Finished difference Result 27775 states and 112554 transitions. [2021-07-09 17:24:21,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:21,163 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:21,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:21,269 INFO L225 Difference]: With dead ends: 27775 [2021-07-09 17:24:21,269 INFO L226 Difference]: Without dead ends: 27747 [2021-07-09 17:24:21,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27747 states. [2021-07-09 17:24:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27747 to 20546. [2021-07-09 17:24:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20546 states, 20545 states have (on average 4.26186420053541) internal successors, (87560), 20545 states have internal predecessors, (87560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20546 states to 20546 states and 87560 transitions. [2021-07-09 17:24:21,868 INFO L78 Accepts]: Start accepts. Automaton has 20546 states and 87560 transitions. Word has length 29 [2021-07-09 17:24:21,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:21,869 INFO L482 AbstractCegarLoop]: Abstraction has 20546 states and 87560 transitions. [2021-07-09 17:24:21,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 20546 states and 87560 transitions. [2021-07-09 17:24:21,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:21,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:21,912 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:22,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:22,113 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:22,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1410258237, now seen corresponding path program 30 times [2021-07-09 17:24:22,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:22,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961375295] [2021-07-09 17:24:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:22,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:22,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961375295] [2021-07-09 17:24:22,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961375295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:22,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565760419] [2021-07-09 17:24:22,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:22,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:24:22,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:22,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:22,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:22,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565760419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:22,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:22,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:24:22,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642710190] [2021-07-09 17:24:22,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:22,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:22,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:22,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:22,229 INFO L87 Difference]: Start difference. First operand 20546 states and 87560 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:22,985 INFO L93 Difference]: Finished difference Result 31505 states and 127549 transitions. [2021-07-09 17:24:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:24:22,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:23,108 INFO L225 Difference]: With dead ends: 31505 [2021-07-09 17:24:23,108 INFO L226 Difference]: Without dead ends: 31505 [2021-07-09 17:24:23,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:24:23,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31505 states. [2021-07-09 17:24:23,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31505 to 20639. [2021-07-09 17:24:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20639 states, 20638 states have (on average 4.2605388119003775) internal successors, (87929), 20638 states have internal predecessors, (87929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20639 states to 20639 states and 87929 transitions. [2021-07-09 17:24:23,859 INFO L78 Accepts]: Start accepts. Automaton has 20639 states and 87929 transitions. Word has length 29 [2021-07-09 17:24:23,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:23,859 INFO L482 AbstractCegarLoop]: Abstraction has 20639 states and 87929 transitions. [2021-07-09 17:24:23,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 20639 states and 87929 transitions. [2021-07-09 17:24:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:23,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:23,906 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:24,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-09 17:24:24,107 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:24,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1856869113, now seen corresponding path program 31 times [2021-07-09 17:24:24,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:24,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693953810] [2021-07-09 17:24:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:24,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:24,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693953810] [2021-07-09 17:24:24,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693953810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:24,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257563448] [2021-07-09 17:24:24,134 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:24,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:24,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:24,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257563448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:24,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:24,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:24:24,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803484876] [2021-07-09 17:24:24,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:24,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:24,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:24,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:24,224 INFO L87 Difference]: Start difference. First operand 20639 states and 87929 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:24,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:24,953 INFO L93 Difference]: Finished difference Result 38173 states and 150936 transitions. [2021-07-09 17:24:24,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:24:24,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:24,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:25,098 INFO L225 Difference]: With dead ends: 38173 [2021-07-09 17:24:25,098 INFO L226 Difference]: Without dead ends: 38153 [2021-07-09 17:24:25,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:24:25,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38153 states. [2021-07-09 17:24:25,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38153 to 20639. [2021-07-09 17:24:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20639 states, 20638 states have (on average 4.260054268824499) internal successors, (87919), 20638 states have internal predecessors, (87919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20639 states to 20639 states and 87919 transitions. [2021-07-09 17:24:25,821 INFO L78 Accepts]: Start accepts. Automaton has 20639 states and 87919 transitions. Word has length 29 [2021-07-09 17:24:25,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:25,821 INFO L482 AbstractCegarLoop]: Abstraction has 20639 states and 87919 transitions. [2021-07-09 17:24:25,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 20639 states and 87919 transitions. [2021-07-09 17:24:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:25,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:25,868 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:26,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:26,068 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:26,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1141511809, now seen corresponding path program 32 times [2021-07-09 17:24:26,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:26,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391062510] [2021-07-09 17:24:26,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:26,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:26,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391062510] [2021-07-09 17:24:26,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391062510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:26,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44923671] [2021-07-09 17:24:26,101 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:26,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:26,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:26,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:26,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:26,304 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 17:24:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:26,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44923671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:26,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:26,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:24:26,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978772548] [2021-07-09 17:24:26,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:26,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:26,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:26,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:26,365 INFO L87 Difference]: Start difference. First operand 20639 states and 87919 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:27,796 INFO L93 Difference]: Finished difference Result 44621 states and 181666 transitions. [2021-07-09 17:24:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 17:24:27,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:27,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:27,969 INFO L225 Difference]: With dead ends: 44621 [2021-07-09 17:24:27,969 INFO L226 Difference]: Without dead ends: 44621 [2021-07-09 17:24:27,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 474.3ms TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:24:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44621 states. [2021-07-09 17:24:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44621 to 21011. [2021-07-09 17:24:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21011 states, 21010 states have (on average 4.254878629224179) internal successors, (89395), 21010 states have internal predecessors, (89395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21011 states to 21011 states and 89395 transitions. [2021-07-09 17:24:28,727 INFO L78 Accepts]: Start accepts. Automaton has 21011 states and 89395 transitions. Word has length 29 [2021-07-09 17:24:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:28,728 INFO L482 AbstractCegarLoop]: Abstraction has 21011 states and 89395 transitions. [2021-07-09 17:24:28,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 21011 states and 89395 transitions. [2021-07-09 17:24:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:28,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:28,774 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:28,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:28,974 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:28,975 INFO L82 PathProgramCache]: Analyzing trace with hash -693734177, now seen corresponding path program 33 times [2021-07-09 17:24:28,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:28,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180008854] [2021-07-09 17:24:28,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:28,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:28,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180008854] [2021-07-09 17:24:28,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180008854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:28,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643809097] [2021-07-09 17:24:29,000 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:29,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:24:29,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:29,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:29,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:29,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643809097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:29,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:29,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:24:29,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082737423] [2021-07-09 17:24:29,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:29,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:29,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:29,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:29,097 INFO L87 Difference]: Start difference. First operand 21011 states and 89395 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:29,920 INFO L93 Difference]: Finished difference Result 44719 states and 175059 transitions. [2021-07-09 17:24:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:24:29,920 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:30,081 INFO L225 Difference]: With dead ends: 44719 [2021-07-09 17:24:30,081 INFO L226 Difference]: Without dead ends: 44519 [2021-07-09 17:24:30,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:24:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44519 states. [2021-07-09 17:24:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44519 to 21017. [2021-07-09 17:24:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21017 states, 21016 states have (on average 4.253235629996193) internal successors, (89386), 21016 states have internal predecessors, (89386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21017 states to 21017 states and 89386 transitions. [2021-07-09 17:24:31,062 INFO L78 Accepts]: Start accepts. Automaton has 21017 states and 89386 transitions. Word has length 29 [2021-07-09 17:24:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:31,062 INFO L482 AbstractCegarLoop]: Abstraction has 21017 states and 89386 transitions. [2021-07-09 17:24:31,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 21017 states and 89386 transitions. [2021-07-09 17:24:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:31,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:31,108 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:31,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:31,321 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:31,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:31,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1091822909, now seen corresponding path program 34 times [2021-07-09 17:24:31,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:31,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745168951] [2021-07-09 17:24:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:31,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:31,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745168951] [2021-07-09 17:24:31,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745168951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:31,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052597233] [2021-07-09 17:24:31,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:31,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:31,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:31,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:31,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:31,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052597233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:31,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:31,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:24:31,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157815933] [2021-07-09 17:24:31,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:31,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:31,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:31,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:31,440 INFO L87 Difference]: Start difference. First operand 21017 states and 89386 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:32,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:32,677 INFO L93 Difference]: Finished difference Result 38364 states and 158236 transitions. [2021-07-09 17:24:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:24:32,677 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:32,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:32,825 INFO L225 Difference]: With dead ends: 38364 [2021-07-09 17:24:32,825 INFO L226 Difference]: Without dead ends: 38344 [2021-07-09 17:24:32,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 424.6ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:24:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38344 states. [2021-07-09 17:24:33,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38344 to 21400. [2021-07-09 17:24:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21400 states, 21399 states have (on average 4.237441001915977) internal successors, (90677), 21399 states have internal predecessors, (90677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:33,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21400 states to 21400 states and 90677 transitions. [2021-07-09 17:24:33,557 INFO L78 Accepts]: Start accepts. Automaton has 21400 states and 90677 transitions. Word has length 29 [2021-07-09 17:24:33,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:33,557 INFO L482 AbstractCegarLoop]: Abstraction has 21400 states and 90677 transitions. [2021-07-09 17:24:33,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:33,557 INFO L276 IsEmpty]: Start isEmpty. Operand 21400 states and 90677 transitions. [2021-07-09 17:24:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:33,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:33,605 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:33,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:33,806 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:33,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:33,806 INFO L82 PathProgramCache]: Analyzing trace with hash -897665189, now seen corresponding path program 35 times [2021-07-09 17:24:33,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:33,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174668003] [2021-07-09 17:24:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:33,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:33,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174668003] [2021-07-09 17:24:33,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174668003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:33,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238672973] [2021-07-09 17:24:33,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:33,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:24:33,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:33,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:33,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:34,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238672973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:34,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:34,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:24:34,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073254199] [2021-07-09 17:24:34,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:34,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:34,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:34,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:34,080 INFO L87 Difference]: Start difference. First operand 21400 states and 90677 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:34,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:34,757 INFO L93 Difference]: Finished difference Result 37284 states and 146566 transitions. [2021-07-09 17:24:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:24:34,757 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:34,887 INFO L225 Difference]: With dead ends: 37284 [2021-07-09 17:24:34,888 INFO L226 Difference]: Without dead ends: 37184 [2021-07-09 17:24:34,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:24:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37184 states. [2021-07-09 17:24:35,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37184 to 21702. [2021-07-09 17:24:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21702 states, 21701 states have (on average 4.22432145984056) internal successors, (91672), 21701 states have internal predecessors, (91672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21702 states to 21702 states and 91672 transitions. [2021-07-09 17:24:35,685 INFO L78 Accepts]: Start accepts. Automaton has 21702 states and 91672 transitions. Word has length 29 [2021-07-09 17:24:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:35,685 INFO L482 AbstractCegarLoop]: Abstraction has 21702 states and 91672 transitions. [2021-07-09 17:24:35,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 21702 states and 91672 transitions. [2021-07-09 17:24:35,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:35,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:35,734 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:35,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 17:24:35,934 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:35,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:35,934 INFO L82 PathProgramCache]: Analyzing trace with hash -430337555, now seen corresponding path program 16 times [2021-07-09 17:24:35,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:35,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742550771] [2021-07-09 17:24:35,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:35,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:35,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742550771] [2021-07-09 17:24:35,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742550771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:35,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827835207] [2021-07-09 17:24:35,974 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:36,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:36,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:36,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:36,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:36,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827835207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:36,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:36,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:24:36,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914047495] [2021-07-09 17:24:36,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:36,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:36,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:36,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:36,064 INFO L87 Difference]: Start difference. First operand 21702 states and 91672 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:37,621 INFO L93 Difference]: Finished difference Result 62502 states and 262210 transitions. [2021-07-09 17:24:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:24:37,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:37,953 INFO L225 Difference]: With dead ends: 62502 [2021-07-09 17:24:37,954 INFO L226 Difference]: Without dead ends: 62502 [2021-07-09 17:24:37,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 418.9ms TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:24:38,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62502 states. [2021-07-09 17:24:38,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62502 to 25980. [2021-07-09 17:24:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25980 states, 25979 states have (on average 4.299280187844028) internal successors, (111691), 25979 states have internal predecessors, (111691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25980 states to 25980 states and 111691 transitions. [2021-07-09 17:24:39,198 INFO L78 Accepts]: Start accepts. Automaton has 25980 states and 111691 transitions. Word has length 29 [2021-07-09 17:24:39,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:39,198 INFO L482 AbstractCegarLoop]: Abstraction has 25980 states and 111691 transitions. [2021-07-09 17:24:39,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:39,198 INFO L276 IsEmpty]: Start isEmpty. Operand 25980 states and 111691 transitions. [2021-07-09 17:24:39,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:39,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:39,270 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:39,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:39,470 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:39,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1857191571, now seen corresponding path program 17 times [2021-07-09 17:24:39,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:39,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227128223] [2021-07-09 17:24:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:39,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:39,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227128223] [2021-07-09 17:24:39,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227128223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:39,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038514917] [2021-07-09 17:24:39,499 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:39,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:24:39,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:39,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:39,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038514917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:39,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:39,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:24:39,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272483090] [2021-07-09 17:24:39,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:39,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:39,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:39,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:39,599 INFO L87 Difference]: Start difference. First operand 25980 states and 111691 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:40,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:40,505 INFO L93 Difference]: Finished difference Result 55112 states and 227311 transitions. [2021-07-09 17:24:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:24:40,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 29 [2021-07-09 17:24:40,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:40,763 INFO L225 Difference]: With dead ends: 55112 [2021-07-09 17:24:40,763 INFO L226 Difference]: Without dead ends: 54872 [2021-07-09 17:24:40,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:24:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54872 states. [2021-07-09 17:24:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54872 to 34226. [2021-07-09 17:24:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34226 states, 34225 states have (on average 4.397428780131483) internal successors, (150502), 34225 states have internal predecessors, (150502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34226 states to 34226 states and 150502 transitions. [2021-07-09 17:24:42,042 INFO L78 Accepts]: Start accepts. Automaton has 34226 states and 150502 transitions. Word has length 29 [2021-07-09 17:24:42,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:42,042 INFO L482 AbstractCegarLoop]: Abstraction has 34226 states and 150502 transitions. [2021-07-09 17:24:42,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 34226 states and 150502 transitions. [2021-07-09 17:24:42,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:42,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:42,130 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:42,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 17:24:42,333 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:42,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:42,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1149024621, now seen corresponding path program 18 times [2021-07-09 17:24:42,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:42,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45025575] [2021-07-09 17:24:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:42,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:42,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45025575] [2021-07-09 17:24:42,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45025575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:42,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042368686] [2021-07-09 17:24:42,351 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:42,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:24:42,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:42,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:42,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:42,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042368686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:42,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:42,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:24:42,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783716032] [2021-07-09 17:24:42,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:42,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:42,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:42,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:42,460 INFO L87 Difference]: Start difference. First operand 34226 states and 150502 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:43,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:43,423 INFO L93 Difference]: Finished difference Result 55218 states and 230451 transitions. [2021-07-09 17:24:43,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:43,423 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:43,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:43,752 INFO L225 Difference]: With dead ends: 55218 [2021-07-09 17:24:43,752 INFO L226 Difference]: Without dead ends: 55218 [2021-07-09 17:24:43,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:43,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55218 states. [2021-07-09 17:24:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55218 to 33975. [2021-07-09 17:24:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33975 states, 33974 states have (on average 4.384441043150645) internal successors, (148957), 33974 states have internal predecessors, (148957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33975 states to 33975 states and 148957 transitions. [2021-07-09 17:24:45,142 INFO L78 Accepts]: Start accepts. Automaton has 33975 states and 148957 transitions. Word has length 29 [2021-07-09 17:24:45,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:45,143 INFO L482 AbstractCegarLoop]: Abstraction has 33975 states and 148957 transitions. [2021-07-09 17:24:45,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:45,143 INFO L276 IsEmpty]: Start isEmpty. Operand 33975 states and 148957 transitions. [2021-07-09 17:24:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:45,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:45,230 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:45,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:45,431 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:45,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:45,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1358085157, now seen corresponding path program 19 times [2021-07-09 17:24:45,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:45,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840359897] [2021-07-09 17:24:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:45,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:45,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840359897] [2021-07-09 17:24:45,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840359897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:45,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138245152] [2021-07-09 17:24:45,449 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:45,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:45,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:45,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138245152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:45,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:45,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:24:45,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120560032] [2021-07-09 17:24:45,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:24:45,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:45,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:24:45,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:24:45,534 INFO L87 Difference]: Start difference. First operand 33975 states and 148957 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:46,230 INFO L93 Difference]: Finished difference Result 43486 states and 183757 transitions. [2021-07-09 17:24:46,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:24:46,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:46,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:46,403 INFO L225 Difference]: With dead ends: 43486 [2021-07-09 17:24:46,403 INFO L226 Difference]: Without dead ends: 43461 [2021-07-09 17:24:46,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:24:46,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43461 states. [2021-07-09 17:24:47,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43461 to 34031. [2021-07-09 17:24:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34031 states, 34030 states have (on average 4.383338230972671) internal successors, (149165), 34030 states have internal predecessors, (149165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:47,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34031 states to 34031 states and 149165 transitions. [2021-07-09 17:24:47,578 INFO L78 Accepts]: Start accepts. Automaton has 34031 states and 149165 transitions. Word has length 29 [2021-07-09 17:24:47,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:47,578 INFO L482 AbstractCegarLoop]: Abstraction has 34031 states and 149165 transitions. [2021-07-09 17:24:47,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:47,578 INFO L276 IsEmpty]: Start isEmpty. Operand 34031 states and 149165 transitions. [2021-07-09 17:24:47,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:47,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:47,667 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:47,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:47,868 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:47,868 INFO L82 PathProgramCache]: Analyzing trace with hash -488972063, now seen corresponding path program 20 times [2021-07-09 17:24:47,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:47,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683499467] [2021-07-09 17:24:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:47,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:47,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683499467] [2021-07-09 17:24:47,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683499467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:47,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299063108] [2021-07-09 17:24:47,885 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:47,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:47,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:47,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:47,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:47,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299063108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:47,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:47,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-09 17:24:47,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733751685] [2021-07-09 17:24:47,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:47,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:47,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:47,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:47,979 INFO L87 Difference]: Start difference. First operand 34031 states and 149165 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:49,293 INFO L93 Difference]: Finished difference Result 91021 states and 382461 transitions. [2021-07-09 17:24:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:24:49,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:49,759 INFO L225 Difference]: With dead ends: 91021 [2021-07-09 17:24:49,760 INFO L226 Difference]: Without dead ends: 91021 [2021-07-09 17:24:49,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91021 states. [2021-07-09 17:24:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91021 to 37194. [2021-07-09 17:24:51,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37194 states, 37193 states have (on average 4.447261581480386) internal successors, (165407), 37193 states have internal predecessors, (165407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37194 states to 37194 states and 165407 transitions. [2021-07-09 17:24:51,951 INFO L78 Accepts]: Start accepts. Automaton has 37194 states and 165407 transitions. Word has length 29 [2021-07-09 17:24:51,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:51,951 INFO L482 AbstractCegarLoop]: Abstraction has 37194 states and 165407 transitions. [2021-07-09 17:24:51,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:51,951 INFO L276 IsEmpty]: Start isEmpty. Operand 37194 states and 165407 transitions. [2021-07-09 17:24:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:52,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:52,059 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:52,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:52,259 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:52,260 INFO L82 PathProgramCache]: Analyzing trace with hash -726935455, now seen corresponding path program 21 times [2021-07-09 17:24:52,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:52,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473808749] [2021-07-09 17:24:52,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:52,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:52,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473808749] [2021-07-09 17:24:52,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473808749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:52,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840855668] [2021-07-09 17:24:52,285 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:52,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:24:52,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:52,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:52,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:52,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840855668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:52,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:52,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-09 17:24:52,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343905972] [2021-07-09 17:24:52,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:52,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:52,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:52,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:52,387 INFO L87 Difference]: Start difference. First operand 37194 states and 165407 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:53,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:53,490 INFO L93 Difference]: Finished difference Result 65131 states and 273960 transitions. [2021-07-09 17:24:53,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:24:53,491 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:53,800 INFO L225 Difference]: With dead ends: 65131 [2021-07-09 17:24:53,800 INFO L226 Difference]: Without dead ends: 65083 [2021-07-09 17:24:53,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:24:53,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65083 states. [2021-07-09 17:24:55,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65083 to 37194. [2021-07-09 17:24:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37194 states, 37193 states have (on average 4.446938940123141) internal successors, (165395), 37193 states have internal predecessors, (165395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37194 states to 37194 states and 165395 transitions. [2021-07-09 17:24:55,304 INFO L78 Accepts]: Start accepts. Automaton has 37194 states and 165395 transitions. Word has length 29 [2021-07-09 17:24:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:55,305 INFO L482 AbstractCegarLoop]: Abstraction has 37194 states and 165395 transitions. [2021-07-09 17:24:55,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 37194 states and 165395 transitions. [2021-07-09 17:24:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:55,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:55,674 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:55,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:55,893 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1887535201, now seen corresponding path program 22 times [2021-07-09 17:24:55,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:55,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792525564] [2021-07-09 17:24:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:55,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:55,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792525564] [2021-07-09 17:24:55,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792525564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:55,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535231019] [2021-07-09 17:24:55,910 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:55,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:55,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:55,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:55,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:56,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535231019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:56,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:56,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-09 17:24:56,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840065245] [2021-07-09 17:24:56,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:56,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:56,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:56,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:56,013 INFO L87 Difference]: Start difference. First operand 37194 states and 165395 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:57,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:57,256 INFO L93 Difference]: Finished difference Result 80813 states and 340534 transitions. [2021-07-09 17:24:57,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:24:57,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:24:57,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:57,633 INFO L225 Difference]: With dead ends: 80813 [2021-07-09 17:24:57,633 INFO L226 Difference]: Without dead ends: 80813 [2021-07-09 17:24:57,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80813 states. [2021-07-09 17:24:59,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80813 to 37432. [2021-07-09 17:24:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37432 states, 37431 states have (on average 4.445646656514653) internal successors, (166405), 37431 states have internal predecessors, (166405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37432 states to 37432 states and 166405 transitions. [2021-07-09 17:24:59,494 INFO L78 Accepts]: Start accepts. Automaton has 37432 states and 166405 transitions. Word has length 29 [2021-07-09 17:24:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:59,495 INFO L482 AbstractCegarLoop]: Abstraction has 37432 states and 166405 transitions. [2021-07-09 17:24:59,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 37432 states and 166405 transitions. [2021-07-09 17:24:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:24:59,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:59,599 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:59,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-09 17:24:59,799 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:59,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:59,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2096595737, now seen corresponding path program 23 times [2021-07-09 17:24:59,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:59,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765504629] [2021-07-09 17:24:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:59,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:59,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765504629] [2021-07-09 17:24:59,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765504629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:59,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052270266] [2021-07-09 17:24:59,824 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:59,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:24:59,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:59,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:24:59,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:59,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052270266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:59,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:59,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-07-09 17:24:59,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580363359] [2021-07-09 17:24:59,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:24:59,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:24:59,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:24:59,915 INFO L87 Difference]: Start difference. First operand 37432 states and 166405 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:00,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:00,983 INFO L93 Difference]: Finished difference Result 70173 states and 294528 transitions. [2021-07-09 17:25:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:25:00,984 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:25:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:01,331 INFO L225 Difference]: With dead ends: 70173 [2021-07-09 17:25:01,332 INFO L226 Difference]: Without dead ends: 70123 [2021-07-09 17:25:01,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70123 states. [2021-07-09 17:25:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70123 to 37432. [2021-07-09 17:25:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37432 states, 37431 states have (on average 4.445326066629264) internal successors, (166393), 37431 states have internal predecessors, (166393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37432 states to 37432 states and 166393 transitions. [2021-07-09 17:25:02,945 INFO L78 Accepts]: Start accepts. Automaton has 37432 states and 166393 transitions. Word has length 29 [2021-07-09 17:25:02,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:02,945 INFO L482 AbstractCegarLoop]: Abstraction has 37432 states and 166393 transitions. [2021-07-09 17:25:02,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:02,946 INFO L276 IsEmpty]: Start isEmpty. Operand 37432 states and 166393 transitions. [2021-07-09 17:25:03,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:03,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:03,336 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:03,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:03,552 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:03,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:03,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1013280541, now seen corresponding path program 24 times [2021-07-09 17:25:03,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:03,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281436362] [2021-07-09 17:25:03,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:03,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:03,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281436362] [2021-07-09 17:25:03,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281436362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:03,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15858457] [2021-07-09 17:25:03,587 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:03,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:25:03,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:03,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:03,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:03,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15858457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:03,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:03,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:25:03,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783203369] [2021-07-09 17:25:03,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:03,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:03,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:03,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:03,697 INFO L87 Difference]: Start difference. First operand 37432 states and 166393 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:05,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:05,082 INFO L93 Difference]: Finished difference Result 71774 states and 303967 transitions. [2021-07-09 17:25:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:25:05,083 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:25:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:05,453 INFO L225 Difference]: With dead ends: 71774 [2021-07-09 17:25:05,453 INFO L226 Difference]: Without dead ends: 71774 [2021-07-09 17:25:05,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 242.6ms TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:25:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71774 states. [2021-07-09 17:25:06,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71774 to 35977. [2021-07-09 17:25:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35977 states, 35976 states have (on average 4.413970424727596) internal successors, (158797), 35976 states have internal predecessors, (158797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:07,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35977 states to 35977 states and 158797 transitions. [2021-07-09 17:25:07,077 INFO L78 Accepts]: Start accepts. Automaton has 35977 states and 158797 transitions. Word has length 29 [2021-07-09 17:25:07,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:07,077 INFO L482 AbstractCegarLoop]: Abstraction has 35977 states and 158797 transitions. [2021-07-09 17:25:07,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:07,078 INFO L276 IsEmpty]: Start isEmpty. Operand 35977 states and 158797 transitions. [2021-07-09 17:25:07,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:07,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:07,455 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:07,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:07,667 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:07,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1632816241, now seen corresponding path program 25 times [2021-07-09 17:25:07,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:07,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845319274] [2021-07-09 17:25:07,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:07,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:07,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845319274] [2021-07-09 17:25:07,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845319274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:07,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537026716] [2021-07-09 17:25:07,691 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:07,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:07,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:07,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537026716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:07,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:07,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:25:07,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245952692] [2021-07-09 17:25:07,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:07,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:07,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:07,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:07,800 INFO L87 Difference]: Start difference. First operand 35977 states and 158797 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:08,813 INFO L93 Difference]: Finished difference Result 58206 states and 243463 transitions. [2021-07-09 17:25:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:25:08,814 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:25:08,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:09,097 INFO L225 Difference]: With dead ends: 58206 [2021-07-09 17:25:09,098 INFO L226 Difference]: Without dead ends: 58131 [2021-07-09 17:25:09,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:25:09,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58131 states. [2021-07-09 17:25:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58131 to 36089. [2021-07-09 17:25:10,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36089 states, 36088 states have (on average 4.4117989359343825) internal successors, (159213), 36088 states have internal predecessors, (159213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36089 states to 36089 states and 159213 transitions. [2021-07-09 17:25:10,489 INFO L78 Accepts]: Start accepts. Automaton has 36089 states and 159213 transitions. Word has length 29 [2021-07-09 17:25:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:10,489 INFO L482 AbstractCegarLoop]: Abstraction has 36089 states and 159213 transitions. [2021-07-09 17:25:10,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 36089 states and 159213 transitions. [2021-07-09 17:25:10,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:10,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:10,588 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:10,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 17:25:10,790 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:10,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:10,790 INFO L82 PathProgramCache]: Analyzing trace with hash 433443621, now seen corresponding path program 26 times [2021-07-09 17:25:10,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:10,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040136062] [2021-07-09 17:25:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:10,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:10,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040136062] [2021-07-09 17:25:10,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040136062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:10,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020558341] [2021-07-09 17:25:10,821 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:10,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:10,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:10,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:10,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:10,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020558341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:10,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:10,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:25:10,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037300521] [2021-07-09 17:25:10,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:10,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:10,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:10,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:10,932 INFO L87 Difference]: Start difference. First operand 36089 states and 159213 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:12,207 INFO L93 Difference]: Finished difference Result 73446 states and 309536 transitions. [2021-07-09 17:25:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:25:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:25:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:12,861 INFO L225 Difference]: With dead ends: 73446 [2021-07-09 17:25:12,861 INFO L226 Difference]: Without dead ends: 73446 [2021-07-09 17:25:12,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:25:12,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73446 states. [2021-07-09 17:25:14,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73446 to 35349. [2021-07-09 17:25:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35349 states, 35348 states have (on average 4.388536833767115) internal successors, (155126), 35348 states have internal predecessors, (155126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35349 states to 35349 states and 155126 transitions. [2021-07-09 17:25:14,590 INFO L78 Accepts]: Start accepts. Automaton has 35349 states and 155126 transitions. Word has length 29 [2021-07-09 17:25:14,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:14,590 INFO L482 AbstractCegarLoop]: Abstraction has 35349 states and 155126 transitions. [2021-07-09 17:25:14,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:14,590 INFO L276 IsEmpty]: Start isEmpty. Operand 35349 states and 155126 transitions. [2021-07-09 17:25:14,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:14,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:14,684 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:14,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:14,901 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:14,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:14,901 INFO L82 PathProgramCache]: Analyzing trace with hash -616109403, now seen corresponding path program 27 times [2021-07-09 17:25:14,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:14,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701905820] [2021-07-09 17:25:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:14,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:14,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701905820] [2021-07-09 17:25:14,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701905820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:14,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759411749] [2021-07-09 17:25:14,928 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:14,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:25:14,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:14,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:14,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:15,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759411749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:15,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:15,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 17:25:15,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517808463] [2021-07-09 17:25:15,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:15,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:15,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:15,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:15,053 INFO L87 Difference]: Start difference. First operand 35349 states and 155126 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:16,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:16,100 INFO L93 Difference]: Finished difference Result 54059 states and 225007 transitions. [2021-07-09 17:25:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:25:16,101 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:25:16,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:16,367 INFO L225 Difference]: With dead ends: 54059 [2021-07-09 17:25:16,368 INFO L226 Difference]: Without dead ends: 53987 [2021-07-09 17:25:16,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:25:16,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53987 states. [2021-07-09 17:25:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53987 to 33989. [2021-07-09 17:25:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33989 states, 33988 states have (on average 4.398140520183595) internal successors, (149484), 33988 states have internal predecessors, (149484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33989 states to 33989 states and 149484 transitions. [2021-07-09 17:25:17,644 INFO L78 Accepts]: Start accepts. Automaton has 33989 states and 149484 transitions. Word has length 29 [2021-07-09 17:25:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:17,644 INFO L482 AbstractCegarLoop]: Abstraction has 33989 states and 149484 transitions. [2021-07-09 17:25:17,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 33989 states and 149484 transitions. [2021-07-09 17:25:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:17,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:17,743 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:17,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-09 17:25:17,945 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:17,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2132415519, now seen corresponding path program 28 times [2021-07-09 17:25:17,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:17,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69243919] [2021-07-09 17:25:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:17,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:17,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69243919] [2021-07-09 17:25:17,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69243919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:17,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942371301] [2021-07-09 17:25:17,968 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:18,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:18,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:18,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:18,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942371301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:18,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:18,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:25:18,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819406323] [2021-07-09 17:25:18,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:25:18,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:18,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:25:18,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:18,080 INFO L87 Difference]: Start difference. First operand 33989 states and 149484 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:18,920 INFO L93 Difference]: Finished difference Result 63659 states and 263324 transitions. [2021-07-09 17:25:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:25:18,920 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:25:18,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:19,198 INFO L225 Difference]: With dead ends: 63659 [2021-07-09 17:25:19,199 INFO L226 Difference]: Without dead ends: 63659 [2021-07-09 17:25:19,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:25:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63659 states. [2021-07-09 17:25:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63659 to 33989. [2021-07-09 17:25:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33989 states, 33988 states have (on average 4.391138048723079) internal successors, (149246), 33988 states have internal predecessors, (149246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33989 states to 33989 states and 149246 transitions. [2021-07-09 17:25:20,580 INFO L78 Accepts]: Start accepts. Automaton has 33989 states and 149246 transitions. Word has length 29 [2021-07-09 17:25:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:20,580 INFO L482 AbstractCegarLoop]: Abstraction has 33989 states and 149246 transitions. [2021-07-09 17:25:20,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 33989 states and 149246 transitions. [2021-07-09 17:25:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:20,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:20,671 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:20,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 17:25:20,872 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:20,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:20,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1924588385, now seen corresponding path program 29 times [2021-07-09 17:25:20,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:20,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833587022] [2021-07-09 17:25:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:20,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:20,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833587022] [2021-07-09 17:25:20,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833587022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:20,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912356691] [2021-07-09 17:25:20,891 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:21,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:25:21,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:21,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:21,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:21,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912356691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:21,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:21,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:25:21,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107409292] [2021-07-09 17:25:21,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:25:21,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:21,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:25:21,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:21,233 INFO L87 Difference]: Start difference. First operand 33989 states and 149246 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:22,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:22,103 INFO L93 Difference]: Finished difference Result 49482 states and 206551 transitions. [2021-07-09 17:25:22,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:25:22,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:25:22,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:22,391 INFO L225 Difference]: With dead ends: 49482 [2021-07-09 17:25:22,391 INFO L226 Difference]: Without dead ends: 49458 [2021-07-09 17:25:22,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:25:22,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49458 states. [2021-07-09 17:25:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49458 to 33537. [2021-07-09 17:25:23,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33537 states, 33536 states have (on average 4.385376908396947) internal successors, (147068), 33536 states have internal predecessors, (147068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33537 states to 33537 states and 147068 transitions. [2021-07-09 17:25:23,513 INFO L78 Accepts]: Start accepts. Automaton has 33537 states and 147068 transitions. Word has length 29 [2021-07-09 17:25:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:23,513 INFO L482 AbstractCegarLoop]: Abstraction has 33537 states and 147068 transitions. [2021-07-09 17:25:23,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 33537 states and 147068 transitions. [2021-07-09 17:25:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:23,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:23,837 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:24,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:24,053 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:24,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:24,053 INFO L82 PathProgramCache]: Analyzing trace with hash 244091745, now seen corresponding path program 30 times [2021-07-09 17:25:24,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:24,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778370665] [2021-07-09 17:25:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:24,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:24,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778370665] [2021-07-09 17:25:24,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778370665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:24,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75843300] [2021-07-09 17:25:24,070 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:24,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:25:24,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:24,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:24,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:24,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75843300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:24,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:24,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:25:24,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281376911] [2021-07-09 17:25:24,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:25:24,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:25:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:24,155 INFO L87 Difference]: Start difference. First operand 33537 states and 147068 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:25,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:25,203 INFO L93 Difference]: Finished difference Result 58652 states and 245549 transitions. [2021-07-09 17:25:25,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:25:25,203 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:25:25,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:25,463 INFO L225 Difference]: With dead ends: 58652 [2021-07-09 17:25:25,463 INFO L226 Difference]: Without dead ends: 58652 [2021-07-09 17:25:25,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58652 states. [2021-07-09 17:25:26,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58652 to 33775. [2021-07-09 17:25:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33775 states, 33774 states have (on average 4.384378516018239) internal successors, (148078), 33774 states have internal predecessors, (148078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33775 states to 33775 states and 148078 transitions. [2021-07-09 17:25:26,829 INFO L78 Accepts]: Start accepts. Automaton has 33775 states and 148078 transitions. Word has length 29 [2021-07-09 17:25:26,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:26,829 INFO L482 AbstractCegarLoop]: Abstraction has 33775 states and 148078 transitions. [2021-07-09 17:25:26,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 33775 states and 148078 transitions. [2021-07-09 17:25:26,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:26,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:26,922 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:27,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:27,123 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:27,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:27,123 INFO L82 PathProgramCache]: Analyzing trace with hash 453152281, now seen corresponding path program 31 times [2021-07-09 17:25:27,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:27,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654136702] [2021-07-09 17:25:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:27,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:27,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654136702] [2021-07-09 17:25:27,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654136702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:27,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815169744] [2021-07-09 17:25:27,141 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:27,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:27,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:27,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815169744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:27,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:27,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:25:27,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067616263] [2021-07-09 17:25:27,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:25:27,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:27,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:25:27,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:27,224 INFO L87 Difference]: Start difference. First operand 33775 states and 148078 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:28,047 INFO L93 Difference]: Finished difference Result 57310 states and 235132 transitions. [2021-07-09 17:25:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:25:28,047 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:25:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:28,348 INFO L225 Difference]: With dead ends: 57310 [2021-07-09 17:25:28,348 INFO L226 Difference]: Without dead ends: 57285 [2021-07-09 17:25:28,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:28,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57285 states. [2021-07-09 17:25:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57285 to 33775. [2021-07-09 17:25:29,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33775 states, 33774 states have (on average 4.3840232131225205) internal successors, (148066), 33774 states have internal predecessors, (148066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33775 states to 33775 states and 148066 transitions. [2021-07-09 17:25:29,627 INFO L78 Accepts]: Start accepts. Automaton has 33775 states and 148066 transitions. Word has length 29 [2021-07-09 17:25:29,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:29,627 INFO L482 AbstractCegarLoop]: Abstraction has 33775 states and 148066 transitions. [2021-07-09 17:25:29,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:29,627 INFO L276 IsEmpty]: Start isEmpty. Operand 33775 states and 148066 transitions. [2021-07-09 17:25:29,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:29,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:29,717 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:29,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:29,918 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:29,920 INFO L82 PathProgramCache]: Analyzing trace with hash -630162915, now seen corresponding path program 32 times [2021-07-09 17:25:29,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:29,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217098756] [2021-07-09 17:25:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:29,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:29,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217098756] [2021-07-09 17:25:29,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217098756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:29,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558583201] [2021-07-09 17:25:29,943 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:29,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:29,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:29,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:29,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:30,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558583201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:30,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:30,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:25:30,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436756208] [2021-07-09 17:25:30,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:30,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:30,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:30,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:30,032 INFO L87 Difference]: Start difference. First operand 33775 states and 148066 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:31,687 INFO L93 Difference]: Finished difference Result 79431 states and 334909 transitions. [2021-07-09 17:25:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:25:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:25:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:32,093 INFO L225 Difference]: With dead ends: 79431 [2021-07-09 17:25:32,094 INFO L226 Difference]: Without dead ends: 79431 [2021-07-09 17:25:32,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=556, Invalid=1994, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:25:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79431 states. [2021-07-09 17:25:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79431 to 34251. [2021-07-09 17:25:33,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34251 states, 34250 states have (on average 4.38207299270073) internal successors, (150086), 34250 states have internal predecessors, (150086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34251 states to 34251 states and 150086 transitions. [2021-07-09 17:25:33,703 INFO L78 Accepts]: Start accepts. Automaton has 34251 states and 150086 transitions. Word has length 29 [2021-07-09 17:25:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:33,703 INFO L482 AbstractCegarLoop]: Abstraction has 34251 states and 150086 transitions. [2021-07-09 17:25:33,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 34251 states and 150086 transitions. [2021-07-09 17:25:33,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:33,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:33,807 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:34,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:34,024 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:34,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:34,025 INFO L82 PathProgramCache]: Analyzing trace with hash -10627215, now seen corresponding path program 33 times [2021-07-09 17:25:34,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:34,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20976911] [2021-07-09 17:25:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:34,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:34,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20976911] [2021-07-09 17:25:34,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20976911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:34,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647871343] [2021-07-09 17:25:34,048 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:34,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:25:34,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:34,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:34,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:34,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647871343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:34,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:34,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:25:34,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155239732] [2021-07-09 17:25:34,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:34,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:34,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:34,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:34,144 INFO L87 Difference]: Start difference. First operand 34251 states and 150086 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:34,636 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-09 17:25:35,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:35,207 INFO L93 Difference]: Finished difference Result 73063 states and 296904 transitions. [2021-07-09 17:25:35,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:25:35,207 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:25:35,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:35,817 INFO L225 Difference]: With dead ends: 73063 [2021-07-09 17:25:35,817 INFO L226 Difference]: Without dead ends: 72813 [2021-07-09 17:25:35,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 427.3ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:25:35,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72813 states. [2021-07-09 17:25:37,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72813 to 34704. [2021-07-09 17:25:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34704 states, 34703 states have (on average 4.386681266749273) internal successors, (152231), 34703 states have internal predecessors, (152231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34704 states to 34704 states and 152231 transitions. [2021-07-09 17:25:37,426 INFO L78 Accepts]: Start accepts. Automaton has 34704 states and 152231 transitions. Word has length 29 [2021-07-09 17:25:37,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:37,426 INFO L482 AbstractCegarLoop]: Abstraction has 34704 states and 152231 transitions. [2021-07-09 17:25:37,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 34704 states and 152231 transitions. [2021-07-09 17:25:37,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:37,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:37,520 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:37,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:37,721 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:37,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1576674531, now seen corresponding path program 34 times [2021-07-09 17:25:37,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:37,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007939632] [2021-07-09 17:25:37,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:37,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:37,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007939632] [2021-07-09 17:25:37,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007939632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:37,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170385657] [2021-07-09 17:25:37,768 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:37,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:37,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:37,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:37,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:37,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170385657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:37,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:37,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:25:37,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102038279] [2021-07-09 17:25:37,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:37,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:37,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:37,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:37,868 INFO L87 Difference]: Start difference. First operand 34704 states and 152231 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:39,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:39,383 INFO L93 Difference]: Finished difference Result 60164 states and 255426 transitions. [2021-07-09 17:25:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:25:39,383 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 29 [2021-07-09 17:25:39,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:39,849 INFO L225 Difference]: With dead ends: 60164 [2021-07-09 17:25:39,850 INFO L226 Difference]: Without dead ends: 60139 [2021-07-09 17:25:39,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 417.8ms TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:25:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60139 states. [2021-07-09 17:25:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60139 to 34900. [2021-07-09 17:25:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34900 states, 34899 states have (on average 4.346571535001003) internal successors, (151691), 34899 states have internal predecessors, (151691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34900 states to 34900 states and 151691 transitions. [2021-07-09 17:25:41,322 INFO L78 Accepts]: Start accepts. Automaton has 34900 states and 151691 transitions. Word has length 29 [2021-07-09 17:25:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:41,323 INFO L482 AbstractCegarLoop]: Abstraction has 34900 states and 151691 transitions. [2021-07-09 17:25:41,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 34900 states and 151691 transitions. [2021-07-09 17:25:41,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:25:41,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:41,435 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:41,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-07-09 17:25:41,636 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:41,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:41,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2064398893, now seen corresponding path program 35 times [2021-07-09 17:25:41,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:41,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312853535] [2021-07-09 17:25:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:41,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:41,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312853535] [2021-07-09 17:25:41,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312853535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:41,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856551172] [2021-07-09 17:25:41,682 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:41,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:25:41,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:41,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:25:41,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:41,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856551172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:41,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:41,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:25:41,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949557013] [2021-07-09 17:25:41,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:25:41,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:41,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:25:41,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:25:41,765 INFO L87 Difference]: Start difference. First operand 34900 states and 151691 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:43,004 INFO L93 Difference]: Finished difference Result 58744 states and 238407 transitions. [2021-07-09 17:25:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:25:43,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 29 [2021-07-09 17:25:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:43,286 INFO L225 Difference]: With dead ends: 58744 [2021-07-09 17:25:43,286 INFO L226 Difference]: Without dead ends: 58603 [2021-07-09 17:25:43,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:25:43,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58603 states. [2021-07-09 17:25:44,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58603 to 35796. [2021-07-09 17:25:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35796 states, 35795 states have (on average 4.330828327978768) internal successors, (155022), 35795 states have internal predecessors, (155022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35796 states to 35796 states and 155022 transitions. [2021-07-09 17:25:44,882 INFO L78 Accepts]: Start accepts. Automaton has 35796 states and 155022 transitions. Word has length 29 [2021-07-09 17:25:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:44,882 INFO L482 AbstractCegarLoop]: Abstraction has 35796 states and 155022 transitions. [2021-07-09 17:25:44,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 35796 states and 155022 transitions. [2021-07-09 17:25:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:25:44,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:44,972 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:45,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:45,173 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:45,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:45,173 INFO L82 PathProgramCache]: Analyzing trace with hash -358826105, now seen corresponding path program 36 times [2021-07-09 17:25:45,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:45,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731153742] [2021-07-09 17:25:45,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:45,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:45,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731153742] [2021-07-09 17:25:45,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731153742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:45,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696405260] [2021-07-09 17:25:45,207 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:45,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:25:45,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:45,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:25:45,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:45,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696405260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:45,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:45,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-07-09 17:25:45,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575688595] [2021-07-09 17:25:45,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:25:45,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:45,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:25:45,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:45,330 INFO L87 Difference]: Start difference. First operand 35796 states and 155022 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:46,013 INFO L93 Difference]: Finished difference Result 38312 states and 164159 transitions. [2021-07-09 17:25:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:25:46,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 17:25:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:46,160 INFO L225 Difference]: With dead ends: 38312 [2021-07-09 17:25:46,160 INFO L226 Difference]: Without dead ends: 38244 [2021-07-09 17:25:46,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:25:46,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38244 states. [2021-07-09 17:25:47,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38244 to 36866. [2021-07-09 17:25:47,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36866 states, 36865 states have (on average 4.320493693204937) internal successors, (159275), 36865 states have internal predecessors, (159275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36866 states to 36866 states and 159275 transitions. [2021-07-09 17:25:47,288 INFO L78 Accepts]: Start accepts. Automaton has 36866 states and 159275 transitions. Word has length 31 [2021-07-09 17:25:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:47,288 INFO L482 AbstractCegarLoop]: Abstraction has 36866 states and 159275 transitions. [2021-07-09 17:25:47,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 36866 states and 159275 transitions. [2021-07-09 17:25:47,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:25:47,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:47,376 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:47,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:47,577 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:47,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:47,577 INFO L82 PathProgramCache]: Analyzing trace with hash -296661377, now seen corresponding path program 37 times [2021-07-09 17:25:47,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:47,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171693731] [2021-07-09 17:25:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:25:47,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:47,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171693731] [2021-07-09 17:25:47,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171693731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:47,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660460289] [2021-07-09 17:25:47,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:47,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:25:47,656 INFO L286 TraceCheckSpWp]: Computing forward predicates...