/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/popl20/figure1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:53:16,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:53:16,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:53:16,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:53:16,924 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 [2021-06-12 20:53:16,944 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:53:16,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:53:16,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:53:16,945 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:53:16,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:53:16,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:53:16,947 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:53:16,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:53:16,947 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:53:16,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:53:16,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:53:16,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:53:16,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:53:16,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:53:16,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:53:16,948 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:53:16,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:53:16,948 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:53:16,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:53:16,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:53:16,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:53:16,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:53:16,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:53:16,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:53:16,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:53:16,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:53:16,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:53:16,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:53:16,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:53:16,957 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:53:16,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:53:16,957 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:53:17,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:53:17,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:53:17,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:53:17,175 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:53:17,176 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:53:17,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl [2021-06-12 20:53:17,177 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl' [2021-06-12 20:53:17,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:53:17,203 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:53:17,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:53:17,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:53:17,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:53:17,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:17" (1/1) ... [2021-06-12 20:53:17,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:17" (1/1) ... [2021-06-12 20:53:17,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:53:17,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:53:17,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:53:17,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:53:17,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:17" (1/1) ... [2021-06-12 20:53:17,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:17" (1/1) ... [2021-06-12 20:53:17,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:17" (1/1) ... [2021-06-12 20:53:17,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:17" (1/1) ... [2021-06-12 20:53:17,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:17" (1/1) ... [2021-06-12 20:53:17,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:17" (1/1) ... [2021-06-12 20:53:17,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:17" (1/1) ... [2021-06-12 20:53:17,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:53:17,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:53:17,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:53:17,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:53:17,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:17" (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 [2021-06-12 20:53:17,275 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:53:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:53:17,275 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:53:17,275 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:53:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:53:17,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:53:17,276 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:53:17,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:53:17,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:53:17,276 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:53:17,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:53:17,459 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 20:53:17,461 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:53:17 BoogieIcfgContainer [2021-06-12 20:53:17,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:53:17,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:53:17,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:53:17,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:53:17,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:53:17" (1/2) ... [2021-06-12 20:53:17,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744e35eb and model type figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:53:17, skipping insertion in model container [2021-06-12 20:53:17,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:53:17" (2/2) ... [2021-06-12 20:53:17,466 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1.wvr.bpl [2021-06-12 20:53:17,469 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:53:17,469 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:53:17,484 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:53:17,485 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:53:17,534 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 20:53:17,547 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 20:53:17,572 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:53:17,572 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:53:17,572 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:53:17,572 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:53:17,573 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:53:17,573 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:53:17,573 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:53:17,573 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:53:17,579 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-06-12 20:53:17,585 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:53:17,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:17,591 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:17,592 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:17,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:17,595 INFO L82 PathProgramCache]: Analyzing trace with hash -155133599, now seen corresponding path program 1 times [2021-06-12 20:53:17,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:17,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736583432] [2021-06-12 20:53:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:17,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:17,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736583432] [2021-06-12 20:53:17,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736583432] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:53:17,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:53:17,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:53:17,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017363945] [2021-06-12 20:53:17,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:53:17,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:17,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:53:17,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:53:17,736 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:17,752 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2021-06-12 20:53:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:53:17,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 20:53:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:17,758 INFO L225 Difference]: With dead ends: 57 [2021-06-12 20:53:17,759 INFO L226 Difference]: Without dead ends: 42 [2021-06-12 20:53:17,759 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:53:17,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-06-12 20:53:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-06-12 20:53:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 71 transitions. [2021-06-12 20:53:17,780 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 71 transitions. Word has length 14 [2021-06-12 20:53:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:17,781 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 71 transitions. [2021-06-12 20:53:17,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:17,781 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 71 transitions. [2021-06-12 20:53:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:53:17,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:17,782 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:17,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:53:17,782 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:17,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1800134561, now seen corresponding path program 1 times [2021-06-12 20:53:17,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:17,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188545236] [2021-06-12 20:53:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:17,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:17,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188545236] [2021-06-12 20:53:17,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188545236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:17,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500369737] [2021-06-12 20:53:17,850 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 [2021-06-12 20:53:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:17,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:53:17,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:17,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500369737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:17,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:17,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-12 20:53:17,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119625721] [2021-06-12 20:53:17,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:53:17,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:17,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:53:17,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:53:17,989 INFO L87 Difference]: Start difference. First operand 40 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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) [2021-06-12 20:53:18,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:18,107 INFO L93 Difference]: Finished difference Result 63 states and 108 transitions. [2021-06-12 20:53:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:53:18,108 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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 16 [2021-06-12 20:53:18,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:18,109 INFO L225 Difference]: With dead ends: 63 [2021-06-12 20:53:18,109 INFO L226 Difference]: Without dead ends: 63 [2021-06-12 20:53:18,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:53:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-12 20:53:18,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-06-12 20:53:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 80 transitions. [2021-06-12 20:53:18,125 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 80 transitions. Word has length 16 [2021-06-12 20:53:18,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:18,126 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 80 transitions. [2021-06-12 20:53:18,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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) [2021-06-12 20:53:18,127 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 80 transitions. [2021-06-12 20:53:18,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:53:18,128 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:18,128 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:18,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-12 20:53:18,345 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:18,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:18,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1152959347, now seen corresponding path program 2 times [2021-06-12 20:53:18,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:18,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525493893] [2021-06-12 20:53:18,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:18,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:18,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525493893] [2021-06-12 20:53:18,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525493893] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:53:18,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:53:18,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:53:18,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656372826] [2021-06-12 20:53:18,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:53:18,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:18,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:53:18,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:53:18,406 INFO L87 Difference]: Start difference. First operand 45 states and 80 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:18,468 INFO L93 Difference]: Finished difference Result 50 states and 88 transitions. [2021-06-12 20:53:18,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:53:18,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:53:18,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:18,472 INFO L225 Difference]: With dead ends: 50 [2021-06-12 20:53:18,475 INFO L226 Difference]: Without dead ends: 48 [2021-06-12 20:53:18,476 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:53:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-12 20:53:18,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-06-12 20:53:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:18,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 76 transitions. [2021-06-12 20:53:18,479 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 76 transitions. Word has length 16 [2021-06-12 20:53:18,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:18,479 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 76 transitions. [2021-06-12 20:53:18,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:18,479 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 76 transitions. [2021-06-12 20:53:18,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:53:18,480 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:18,480 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:18,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:53:18,480 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:18,480 INFO L82 PathProgramCache]: Analyzing trace with hash 19790621, now seen corresponding path program 1 times [2021-06-12 20:53:18,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:18,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577102057] [2021-06-12 20:53:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:18,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:18,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577102057] [2021-06-12 20:53:18,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577102057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:18,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897021693] [2021-06-12 20:53:18,571 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 [2021-06-12 20:53:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:18,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:53:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:18,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897021693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:18,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:18,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 20:53:18,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495932407] [2021-06-12 20:53:18,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:53:18,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:18,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:53:18,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:53:18,708 INFO L87 Difference]: Start difference. First operand 43 states and 76 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:18,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:18,718 INFO L93 Difference]: Finished difference Result 96 states and 173 transitions. [2021-06-12 20:53:18,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:53:18,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:53:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:18,719 INFO L225 Difference]: With dead ends: 96 [2021-06-12 20:53:18,719 INFO L226 Difference]: Without dead ends: 75 [2021-06-12 20:53:18,720 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:53:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-12 20:53:18,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2021-06-12 20:53:18,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:18,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 109 transitions. [2021-06-12 20:53:18,724 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 109 transitions. Word has length 18 [2021-06-12 20:53:18,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:18,724 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 109 transitions. [2021-06-12 20:53:18,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:18,724 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 109 transitions. [2021-06-12 20:53:18,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:53:18,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:18,725 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:18,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:18,937 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:18,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1443468059, now seen corresponding path program 2 times [2021-06-12 20:53:18,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:18,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428384240] [2021-06-12 20:53:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:19,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:19,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428384240] [2021-06-12 20:53:19,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428384240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:19,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502121826] [2021-06-12 20:53:19,008 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 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 [2021-06-12 20:53:19,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:53:19,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:53:19,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:19,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502121826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:19,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:19,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-12 20:53:19,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248129939] [2021-06-12 20:53:19,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:53:19,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:19,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:53:19,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:53:19,168 INFO L87 Difference]: Start difference. First operand 58 states and 109 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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) [2021-06-12 20:53:19,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:19,435 INFO L93 Difference]: Finished difference Result 173 states and 308 transitions. [2021-06-12 20:53:19,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:53:19,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 20 [2021-06-12 20:53:19,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:19,437 INFO L225 Difference]: With dead ends: 173 [2021-06-12 20:53:19,437 INFO L226 Difference]: Without dead ends: 167 [2021-06-12 20:53:19,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:53:19,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-12 20:53:19,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 67. [2021-06-12 20:53:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:19,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 129 transitions. [2021-06-12 20:53:19,453 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 129 transitions. Word has length 20 [2021-06-12 20:53:19,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:19,453 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 129 transitions. [2021-06-12 20:53:19,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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) [2021-06-12 20:53:19,454 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 129 transitions. [2021-06-12 20:53:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:53:19,454 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:19,454 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:19,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:19,655 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:19,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:19,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1693280397, now seen corresponding path program 3 times [2021-06-12 20:53:19,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:19,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470279960] [2021-06-12 20:53:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:19,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:19,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470279960] [2021-06-12 20:53:19,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470279960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:19,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646344807] [2021-06-12 20:53:19,697 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:19,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:53:19,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:19,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:53:19,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:19,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646344807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:19,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:19,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 20:53:19,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033863955] [2021-06-12 20:53:19,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:53:19,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:19,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:53:19,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:53:19,810 INFO L87 Difference]: Start difference. First operand 67 states and 129 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-06-12 20:53:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:20,038 INFO L93 Difference]: Finished difference Result 145 states and 267 transitions. [2021-06-12 20:53:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:53:20,038 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:53:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:20,039 INFO L225 Difference]: With dead ends: 145 [2021-06-12 20:53:20,039 INFO L226 Difference]: Without dead ends: 141 [2021-06-12 20:53:20,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:53:20,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-12 20:53:20,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 66. [2021-06-12 20:53:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-06-12 20:53:20,042 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 20 [2021-06-12 20:53:20,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:20,042 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-06-12 20:53:20,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-06-12 20:53:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-06-12 20:53:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:53:20,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:20,043 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:20,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:20,260 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:20,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:20,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1024348455, now seen corresponding path program 4 times [2021-06-12 20:53:20,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:20,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640174774] [2021-06-12 20:53:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:20,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:20,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640174774] [2021-06-12 20:53:20,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640174774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:20,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510946779] [2021-06-12 20:53:20,310 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 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 [2021-06-12 20:53:20,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:53:20,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:20,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:53:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:20,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510946779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:20,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:20,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:53:20,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402999846] [2021-06-12 20:53:20,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:53:20,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:20,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:53:20,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:53:20,391 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:20,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:20,405 INFO L93 Difference]: Finished difference Result 162 states and 309 transitions. [2021-06-12 20:53:20,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:53:20,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:53:20,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:20,406 INFO L225 Difference]: With dead ends: 162 [2021-06-12 20:53:20,406 INFO L226 Difference]: Without dead ends: 135 [2021-06-12 20:53:20,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:53:20,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-12 20:53:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-06-12 20:53:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-06-12 20:53:20,411 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 22 [2021-06-12 20:53:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:20,411 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-06-12 20:53:20,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-06-12 20:53:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:53:20,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:20,412 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:20,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-12 20:53:20,633 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:20,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:20,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1876617257, now seen corresponding path program 5 times [2021-06-12 20:53:20,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:20,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673968763] [2021-06-12 20:53:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:20,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:20,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673968763] [2021-06-12 20:53:20,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673968763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:20,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680862147] [2021-06-12 20:53:20,721 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 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 [2021-06-12 20:53:20,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:53:20,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:20,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:53:20,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:20,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680862147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:20,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:20,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 20:53:20,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99057151] [2021-06-12 20:53:20,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:53:20,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:20,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:53:20,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:53:20,889 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-12 20:53:21,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:21,329 INFO L93 Difference]: Finished difference Result 364 states and 691 transitions. [2021-06-12 20:53:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:53:21,337 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 24 [2021-06-12 20:53:21,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:21,339 INFO L225 Difference]: With dead ends: 364 [2021-06-12 20:53:21,339 INFO L226 Difference]: Without dead ends: 334 [2021-06-12 20:53:21,339 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 385.4ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:53:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-12 20:53:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 92. [2021-06-12 20:53:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 179 transitions. [2021-06-12 20:53:21,351 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 179 transitions. Word has length 24 [2021-06-12 20:53:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:21,352 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 179 transitions. [2021-06-12 20:53:21,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-12 20:53:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 179 transitions. [2021-06-12 20:53:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:53:21,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:21,356 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:21,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:21,565 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1240439411, now seen corresponding path program 6 times [2021-06-12 20:53:21,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:21,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093048984] [2021-06-12 20:53:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:21,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093048984] [2021-06-12 20:53:21,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093048984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240373687] [2021-06-12 20:53:21,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 20:53:21,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:53:21,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:53:21,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:21,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240373687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:21,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:21,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-12 20:53:21,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886306219] [2021-06-12 20:53:21,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:53:21,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:21,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:53:21,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:53:21,766 INFO L87 Difference]: Start difference. First operand 92 states and 179 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2021-06-12 20:53:22,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:22,240 INFO L93 Difference]: Finished difference Result 239 states and 453 transitions. [2021-06-12 20:53:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:53:22,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 24 [2021-06-12 20:53:22,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:22,241 INFO L225 Difference]: With dead ends: 239 [2021-06-12 20:53:22,241 INFO L226 Difference]: Without dead ends: 235 [2021-06-12 20:53:22,242 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 420.2ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:53:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-12 20:53:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 84. [2021-06-12 20:53:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 83 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 164 transitions. [2021-06-12 20:53:22,245 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 164 transitions. Word has length 24 [2021-06-12 20:53:22,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:22,245 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 164 transitions. [2021-06-12 20:53:22,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2021-06-12 20:53:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 164 transitions. [2021-06-12 20:53:22,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:53:22,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:22,245 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:22,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:22,461 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:22,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:22,461 INFO L82 PathProgramCache]: Analyzing trace with hash -465636203, now seen corresponding path program 7 times [2021-06-12 20:53:22,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:22,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531143434] [2021-06-12 20:53:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:22,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:22,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531143434] [2021-06-12 20:53:22,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531143434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:22,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623489489] [2021-06-12 20:53:22,500 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 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 [2021-06-12 20:53:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:22,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:53:22,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:22,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623489489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:22,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:22,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:53:22,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744369479] [2021-06-12 20:53:22,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:53:22,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:22,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:53:22,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:53:22,585 INFO L87 Difference]: Start difference. First operand 84 states and 164 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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) [2021-06-12 20:53:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:22,605 INFO L93 Difference]: Finished difference Result 221 states and 426 transitions. [2021-06-12 20:53:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:53:22,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 26 [2021-06-12 20:53:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:22,606 INFO L225 Difference]: With dead ends: 221 [2021-06-12 20:53:22,606 INFO L226 Difference]: Without dead ends: 188 [2021-06-12 20:53:22,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:53:22,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-12 20:53:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2021-06-12 20:53:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0833333333333335) internal successors, (300), 144 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 300 transitions. [2021-06-12 20:53:22,610 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 300 transitions. Word has length 26 [2021-06-12 20:53:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:22,610 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 300 transitions. [2021-06-12 20:53:22,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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) [2021-06-12 20:53:22,610 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 300 transitions. [2021-06-12 20:53:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:53:22,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:22,611 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:22,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 20:53:22,817 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:22,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1485197677, now seen corresponding path program 8 times [2021-06-12 20:53:22,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:22,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182733835] [2021-06-12 20:53:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:22,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:22,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182733835] [2021-06-12 20:53:22,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182733835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:22,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10661669] [2021-06-12 20:53:22,906 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 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 [2021-06-12 20:53:22,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:53:22,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:22,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:53:22,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:23,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10661669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:23,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:23,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 20:53:23,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695993487] [2021-06-12 20:53:23,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:53:23,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:23,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:53:23,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:53:23,134 INFO L87 Difference]: Start difference. First operand 145 states and 300 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:23,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:23,834 INFO L93 Difference]: Finished difference Result 561 states and 1077 transitions. [2021-06-12 20:53:23,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:53:23,837 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 20:53:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:23,838 INFO L225 Difference]: With dead ends: 561 [2021-06-12 20:53:23,838 INFO L226 Difference]: Without dead ends: 495 [2021-06-12 20:53:23,839 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 603.8ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:53:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-12 20:53:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 114. [2021-06-12 20:53:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.991150442477876) internal successors, (225), 113 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 225 transitions. [2021-06-12 20:53:23,844 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 225 transitions. Word has length 28 [2021-06-12 20:53:23,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:23,844 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 225 transitions. [2021-06-12 20:53:23,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:23,844 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 225 transitions. [2021-06-12 20:53:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:53:23,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:23,846 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:24,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:24,061 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:24,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:24,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1081045901, now seen corresponding path program 9 times [2021-06-12 20:53:24,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:24,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282785313] [2021-06-12 20:53:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:24,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:24,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282785313] [2021-06-12 20:53:24,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282785313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:24,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45260303] [2021-06-12 20:53:24,134 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 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 [2021-06-12 20:53:24,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 20:53:24,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:24,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:53:24,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:24,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45260303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:24,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:24,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-12 20:53:24,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511632364] [2021-06-12 20:53:24,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:53:24,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:24,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:53:24,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:53:24,301 INFO L87 Difference]: Start difference. First operand 114 states and 225 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-12 20:53:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:24,926 INFO L93 Difference]: Finished difference Result 351 states and 677 transitions. [2021-06-12 20:53:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:53:24,926 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 28 [2021-06-12 20:53:24,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:24,928 INFO L225 Difference]: With dead ends: 351 [2021-06-12 20:53:24,928 INFO L226 Difference]: Without dead ends: 347 [2021-06-12 20:53:24,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:53:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-12 20:53:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 102. [2021-06-12 20:53:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-06-12 20:53:24,932 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 28 [2021-06-12 20:53:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:24,932 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-06-12 20:53:24,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-12 20:53:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-06-12 20:53:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 20:53:24,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:24,933 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:25,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:25,141 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:25,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:25,142 INFO L82 PathProgramCache]: Analyzing trace with hash 2026425425, now seen corresponding path program 10 times [2021-06-12 20:53:25,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:25,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453140444] [2021-06-12 20:53:25,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:25,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:25,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453140444] [2021-06-12 20:53:25,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453140444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:25,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706459804] [2021-06-12 20:53:25,194 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 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 [2021-06-12 20:53:25,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:53:25,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:25,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:53:25,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:25,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706459804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:25,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:25,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:53:25,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617373805] [2021-06-12 20:53:25,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:53:25,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:25,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:53:25,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:53:25,265 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-06-12 20:53:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:25,299 INFO L93 Difference]: Finished difference Result 280 states and 543 transitions. [2021-06-12 20:53:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:53:25,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 30 [2021-06-12 20:53:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:25,300 INFO L225 Difference]: With dead ends: 280 [2021-06-12 20:53:25,301 INFO L226 Difference]: Without dead ends: 241 [2021-06-12 20:53:25,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:53:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-12 20:53:25,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 185. [2021-06-12 20:53:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1032608695652173) internal successors, (387), 184 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 387 transitions. [2021-06-12 20:53:25,304 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 387 transitions. Word has length 30 [2021-06-12 20:53:25,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:25,304 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 387 transitions. [2021-06-12 20:53:25,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-06-12 20:53:25,305 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 387 transitions. [2021-06-12 20:53:25,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 20:53:25,305 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:25,305 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:25,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-12 20:53:25,513 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:25,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1274697551, now seen corresponding path program 11 times [2021-06-12 20:53:25,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:25,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345973820] [2021-06-12 20:53:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:25,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:25,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345973820] [2021-06-12 20:53:25,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345973820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:25,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960166154] [2021-06-12 20:53:25,609 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 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 [2021-06-12 20:53:25,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:53:25,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:25,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 20:53:25,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:25,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960166154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:25,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:25,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-12 20:53:25,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975279288] [2021-06-12 20:53:25,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:53:25,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:25,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:53:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:53:25,852 INFO L87 Difference]: Start difference. First operand 185 states and 387 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:26,877 INFO L93 Difference]: Finished difference Result 786 states and 1519 transitions. [2021-06-12 20:53:26,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:53:26,877 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 20:53:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:26,879 INFO L225 Difference]: With dead ends: 786 [2021-06-12 20:53:26,879 INFO L226 Difference]: Without dead ends: 678 [2021-06-12 20:53:26,880 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 877.7ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 20:53:26,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-12 20:53:26,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 136. [2021-06-12 20:53:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 135 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 271 transitions. [2021-06-12 20:53:26,885 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 271 transitions. Word has length 32 [2021-06-12 20:53:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:26,886 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 271 transitions. [2021-06-12 20:53:26,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 271 transitions. [2021-06-12 20:53:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 20:53:26,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:26,887 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:27,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 20:53:27,101 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:27,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:27,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1086729587, now seen corresponding path program 12 times [2021-06-12 20:53:27,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:27,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981385608] [2021-06-12 20:53:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:27,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:27,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981385608] [2021-06-12 20:53:27,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981385608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:27,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259319861] [2021-06-12 20:53:27,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 20:53:27,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 20:53:27,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:27,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 20:53:27,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:27,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259319861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:27,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:27,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-12 20:53:27,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799339771] [2021-06-12 20:53:27,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:53:27,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:27,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:53:27,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:27,371 INFO L87 Difference]: Start difference. First operand 136 states and 271 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:28,266 INFO L93 Difference]: Finished difference Result 485 states and 945 transitions. [2021-06-12 20:53:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:53:28,266 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 20:53:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:28,267 INFO L225 Difference]: With dead ends: 485 [2021-06-12 20:53:28,268 INFO L226 Difference]: Without dead ends: 481 [2021-06-12 20:53:28,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 826.6ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 20:53:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-12 20:53:28,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 120. [2021-06-12 20:53:28,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0168067226890756) internal successors, (240), 119 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 240 transitions. [2021-06-12 20:53:28,272 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 240 transitions. Word has length 32 [2021-06-12 20:53:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:28,272 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 240 transitions. [2021-06-12 20:53:28,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:28,272 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 240 transitions. [2021-06-12 20:53:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 20:53:28,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:28,273 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:28,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 20:53:28,482 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:28,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash -4049395, now seen corresponding path program 13 times [2021-06-12 20:53:28,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:28,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140469379] [2021-06-12 20:53:28,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:28,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:28,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140469379] [2021-06-12 20:53:28,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140469379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:28,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216899914] [2021-06-12 20:53:28,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 20:53:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:28,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:53:28,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:28,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216899914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:28,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:28,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:53:28,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325412845] [2021-06-12 20:53:28,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:53:28,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:28,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:53:28,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:53:28,609 INFO L87 Difference]: Start difference. First operand 120 states and 240 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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) [2021-06-12 20:53:28,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:28,661 INFO L93 Difference]: Finished difference Result 339 states and 660 transitions. [2021-06-12 20:53:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:53:28,661 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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 34 [2021-06-12 20:53:28,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:28,663 INFO L225 Difference]: With dead ends: 339 [2021-06-12 20:53:28,663 INFO L226 Difference]: Without dead ends: 294 [2021-06-12 20:53:28,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:53:28,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-12 20:53:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2021-06-12 20:53:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1160714285714284) internal successors, (474), 224 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 474 transitions. [2021-06-12 20:53:28,669 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 474 transitions. Word has length 34 [2021-06-12 20:53:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:28,670 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 474 transitions. [2021-06-12 20:53:28,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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) [2021-06-12 20:53:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 474 transitions. [2021-06-12 20:53:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:53:28,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:28,670 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:28,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:28,881 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:28,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:28,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2031751691, now seen corresponding path program 14 times [2021-06-12 20:53:28,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:28,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707991006] [2021-06-12 20:53:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:28,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:28,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707991006] [2021-06-12 20:53:28,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707991006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:28,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107178761] [2021-06-12 20:53:28,998 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 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 [2021-06-12 20:53:29,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:53:29,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:29,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:53:29,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:29,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107178761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:29,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:29,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-12 20:53:29,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146455476] [2021-06-12 20:53:29,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:53:29,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:29,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:53:29,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:53:29,252 INFO L87 Difference]: Start difference. First operand 225 states and 474 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:30,647 INFO L93 Difference]: Finished difference Result 1039 states and 2017 transitions. [2021-06-12 20:53:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 20:53:30,648 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:53:30,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:30,650 INFO L225 Difference]: With dead ends: 1039 [2021-06-12 20:53:30,650 INFO L226 Difference]: Without dead ends: 883 [2021-06-12 20:53:30,652 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 1239.7ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 20:53:30,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-06-12 20:53:30,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 158. [2021-06-12 20:53:30,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.0191082802547773) internal successors, (317), 157 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 317 transitions. [2021-06-12 20:53:30,658 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 317 transitions. Word has length 36 [2021-06-12 20:53:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:30,658 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 317 transitions. [2021-06-12 20:53:30,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:30,659 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 317 transitions. [2021-06-12 20:53:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:53:30,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:30,659 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:30,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 20:53:30,874 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:30,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1527693965, now seen corresponding path program 15 times [2021-06-12 20:53:30,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:30,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292129957] [2021-06-12 20:53:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:30,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:30,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292129957] [2021-06-12 20:53:30,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292129957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:30,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211634205] [2021-06-12 20:53:30,943 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 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 [2021-06-12 20:53:30,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 20:53:30,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:53:30,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:31,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211634205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:31,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:31,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-06-12 20:53:31,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642644720] [2021-06-12 20:53:31,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:53:31,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:31,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:53:31,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:53:31,205 INFO L87 Difference]: Start difference. First operand 158 states and 317 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:32,413 INFO L93 Difference]: Finished difference Result 641 states and 1257 transitions. [2021-06-12 20:53:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 20:53:32,413 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:53:32,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:32,417 INFO L225 Difference]: With dead ends: 641 [2021-06-12 20:53:32,417 INFO L226 Difference]: Without dead ends: 637 [2021-06-12 20:53:32,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 1132.9ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 20:53:32,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-06-12 20:53:32,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 138. [2021-06-12 20:53:32,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 137 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 278 transitions. [2021-06-12 20:53:32,422 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 278 transitions. Word has length 36 [2021-06-12 20:53:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:32,422 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 278 transitions. [2021-06-12 20:53:32,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 278 transitions. [2021-06-12 20:53:32,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 20:53:32,423 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:32,423 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:32,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 20:53:32,637 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:32,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1675506121, now seen corresponding path program 16 times [2021-06-12 20:53:32,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:32,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123778276] [2021-06-12 20:53:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:32,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:32,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123778276] [2021-06-12 20:53:32,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123778276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:32,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950221378] [2021-06-12 20:53:32,699 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 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 [2021-06-12 20:53:32,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:53:32,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:32,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 20:53:32,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:32,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950221378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:32,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:32,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:53:32,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414005786] [2021-06-12 20:53:32,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:53:32,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:53:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:53:32,784 INFO L87 Difference]: Start difference. First operand 138 states and 278 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-06-12 20:53:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:32,838 INFO L93 Difference]: Finished difference Result 398 states and 777 transitions. [2021-06-12 20:53:32,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:53:32,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 38 [2021-06-12 20:53:32,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:32,840 INFO L225 Difference]: With dead ends: 398 [2021-06-12 20:53:32,840 INFO L226 Difference]: Without dead ends: 347 [2021-06-12 20:53:32,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:53:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-12 20:53:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2021-06-12 20:53:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.125) internal successors, (561), 264 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 561 transitions. [2021-06-12 20:53:32,847 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 561 transitions. Word has length 38 [2021-06-12 20:53:32,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:32,847 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 561 transitions. [2021-06-12 20:53:32,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-06-12 20:53:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 561 transitions. [2021-06-12 20:53:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 20:53:32,847 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:32,847 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:33,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:33,061 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:33,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:33,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1976295111, now seen corresponding path program 17 times [2021-06-12 20:53:33,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:33,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302047000] [2021-06-12 20:53:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:33,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:33,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302047000] [2021-06-12 20:53:33,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302047000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:33,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790913791] [2021-06-12 20:53:33,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 20:53:33,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 20:53:33,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:33,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:53:33,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:33,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790913791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:33,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:33,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-12 20:53:33,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963563865] [2021-06-12 20:53:33,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 20:53:33,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 20:53:33,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:53:33,594 INFO L87 Difference]: Start difference. First operand 265 states and 561 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:35,416 INFO L93 Difference]: Finished difference Result 1320 states and 2571 transitions. [2021-06-12 20:53:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-12 20:53:35,417 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-12 20:53:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:35,420 INFO L225 Difference]: With dead ends: 1320 [2021-06-12 20:53:35,420 INFO L226 Difference]: Without dead ends: 1110 [2021-06-12 20:53:35,422 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3798 ImplicationChecksByTransitivity, 1653.8ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-06-12 20:53:35,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-12 20:53:35,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 180. [2021-06-12 20:53:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.0279329608938546) internal successors, (363), 179 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:35,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 363 transitions. [2021-06-12 20:53:35,428 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 363 transitions. Word has length 40 [2021-06-12 20:53:35,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:35,428 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 363 transitions. [2021-06-12 20:53:35,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 363 transitions. [2021-06-12 20:53:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-12 20:53:35,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:35,429 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:35,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:35,641 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:35,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:35,641 INFO L82 PathProgramCache]: Analyzing trace with hash -302152819, now seen corresponding path program 18 times [2021-06-12 20:53:35,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:35,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373822950] [2021-06-12 20:53:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:35,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:35,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373822950] [2021-06-12 20:53:35,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373822950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:35,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111541680] [2021-06-12 20:53:35,709 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 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 [2021-06-12 20:53:35,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 20:53:35,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:35,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:53:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:36,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111541680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:36,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:36,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-06-12 20:53:36,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870484221] [2021-06-12 20:53:36,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:53:36,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:36,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:53:36,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:53:36,007 INFO L87 Difference]: Start difference. First operand 180 states and 363 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:37,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:37,740 INFO L93 Difference]: Finished difference Result 819 states and 1613 transitions. [2021-06-12 20:53:37,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 20:53:37,740 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-12 20:53:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:37,742 INFO L225 Difference]: With dead ends: 819 [2021-06-12 20:53:37,742 INFO L226 Difference]: Without dead ends: 815 [2021-06-12 20:53:37,744 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 1605.0ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-06-12 20:53:37,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-06-12 20:53:37,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 156. [2021-06-12 20:53:37,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.0387096774193547) internal successors, (316), 155 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:37,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 316 transitions. [2021-06-12 20:53:37,759 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 316 transitions. Word has length 40 [2021-06-12 20:53:37,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:37,759 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 316 transitions. [2021-06-12 20:53:37,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:37,760 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 316 transitions. [2021-06-12 20:53:37,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 20:53:37,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:37,761 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:37,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:37,973 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:37,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:37,973 INFO L82 PathProgramCache]: Analyzing trace with hash -78659707, now seen corresponding path program 19 times [2021-06-12 20:53:37,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:37,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781689976] [2021-06-12 20:53:37,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:38,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:38,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781689976] [2021-06-12 20:53:38,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781689976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:38,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668881522] [2021-06-12 20:53:38,048 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 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 [2021-06-12 20:53:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:38,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:53:38,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:38,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668881522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:38,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:38,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 20:53:38,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218992589] [2021-06-12 20:53:38,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:53:38,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:38,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:53:38,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:53:38,131 INFO L87 Difference]: Start difference. First operand 156 states and 316 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-06-12 20:53:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:38,200 INFO L93 Difference]: Finished difference Result 457 states and 894 transitions. [2021-06-12 20:53:38,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:53:38,201 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 42 [2021-06-12 20:53:38,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:38,202 INFO L225 Difference]: With dead ends: 457 [2021-06-12 20:53:38,202 INFO L226 Difference]: Without dead ends: 400 [2021-06-12 20:53:38,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:53:38,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-12 20:53:38,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 305. [2021-06-12 20:53:38,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.1315789473684212) internal successors, (648), 304 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 648 transitions. [2021-06-12 20:53:38,209 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 648 transitions. Word has length 42 [2021-06-12 20:53:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:38,209 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 648 transitions. [2021-06-12 20:53:38,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-06-12 20:53:38,209 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 648 transitions. [2021-06-12 20:53:38,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-12 20:53:38,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:38,209 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:38,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 20:53:38,426 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:38,426 INFO L82 PathProgramCache]: Analyzing trace with hash -729629309, now seen corresponding path program 20 times [2021-06-12 20:53:38,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:38,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391146697] [2021-06-12 20:53:38,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:38,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:38,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391146697] [2021-06-12 20:53:38,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391146697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:38,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584111026] [2021-06-12 20:53:38,600 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 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 [2021-06-12 20:53:38,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:53:38,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:38,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:53:38,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:38,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584111026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:38,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:38,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-12 20:53:38,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819839955] [2021-06-12 20:53:38,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 20:53:38,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:38,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 20:53:38,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:53:38,972 INFO L87 Difference]: Start difference. First operand 305 states and 648 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:41,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:41,401 INFO L93 Difference]: Finished difference Result 1629 states and 3181 transitions. [2021-06-12 20:53:41,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-12 20:53:41,401 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-12 20:53:41,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:41,404 INFO L225 Difference]: With dead ends: 1629 [2021-06-12 20:53:41,404 INFO L226 Difference]: Without dead ends: 1359 [2021-06-12 20:53:41,405 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5875 ImplicationChecksByTransitivity, 2199.2ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-06-12 20:53:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-12 20:53:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 202. [2021-06-12 20:53:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0348258706467663) internal successors, (409), 201 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 409 transitions. [2021-06-12 20:53:41,411 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 409 transitions. Word has length 44 [2021-06-12 20:53:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:41,411 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 409 transitions. [2021-06-12 20:53:41,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 409 transitions. [2021-06-12 20:53:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-12 20:53:41,411 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:41,412 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:41,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 20:53:41,625 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:41,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:41,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1199920525, now seen corresponding path program 21 times [2021-06-12 20:53:41,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:41,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862507288] [2021-06-12 20:53:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:41,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:41,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862507288] [2021-06-12 20:53:41,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862507288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:41,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287866010] [2021-06-12 20:53:41,705 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 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 [2021-06-12 20:53:41,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 20:53:41,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:41,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:53:41,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:42,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287866010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:42,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:42,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-06-12 20:53:42,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424767572] [2021-06-12 20:53:42,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:53:42,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:42,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:53:42,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:53:42,044 INFO L87 Difference]: Start difference. First operand 202 states and 409 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:44,200 INFO L93 Difference]: Finished difference Result 1019 states and 2013 transitions. [2021-06-12 20:53:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-12 20:53:44,200 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-12 20:53:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:44,203 INFO L225 Difference]: With dead ends: 1019 [2021-06-12 20:53:44,203 INFO L226 Difference]: Without dead ends: 1015 [2021-06-12 20:53:44,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5830 ImplicationChecksByTransitivity, 2011.5ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-06-12 20:53:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-06-12 20:53:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 174. [2021-06-12 20:53:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.046242774566474) internal successors, (354), 173 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 354 transitions. [2021-06-12 20:53:44,208 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 354 transitions. Word has length 44 [2021-06-12 20:53:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:44,208 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 354 transitions. [2021-06-12 20:53:44,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 354 transitions. [2021-06-12 20:53:44,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:53:44,208 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:44,208 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:44,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:44,424 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:44,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:44,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2016813247, now seen corresponding path program 22 times [2021-06-12 20:53:44,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:44,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435274009] [2021-06-12 20:53:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:44,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:44,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435274009] [2021-06-12 20:53:44,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435274009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:44,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33535512] [2021-06-12 20:53:44,492 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 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 [2021-06-12 20:53:44,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:53:44,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:44,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:53:44,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:44,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33535512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:44,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:44,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:53:44,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151222274] [2021-06-12 20:53:44,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:53:44,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:44,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:53:44,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:53:44,583 INFO L87 Difference]: Start difference. First operand 174 states and 354 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) 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) [2021-06-12 20:53:44,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:44,669 INFO L93 Difference]: Finished difference Result 516 states and 1011 transitions. [2021-06-12 20:53:44,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:53:44,669 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) 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 46 [2021-06-12 20:53:44,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:44,670 INFO L225 Difference]: With dead ends: 516 [2021-06-12 20:53:44,671 INFO L226 Difference]: Without dead ends: 453 [2021-06-12 20:53:44,671 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:53:44,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-12 20:53:44,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 345. [2021-06-12 20:53:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.136627906976744) internal successors, (735), 344 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:44,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 735 transitions. [2021-06-12 20:53:44,676 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 735 transitions. Word has length 46 [2021-06-12 20:53:44,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:44,676 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 735 transitions. [2021-06-12 20:53:44,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) 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) [2021-06-12 20:53:44,676 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 735 transitions. [2021-06-12 20:53:44,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 20:53:44,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:44,677 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:44,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 20:53:44,893 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:44,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:44,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1932635711, now seen corresponding path program 23 times [2021-06-12 20:53:44,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:44,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310294917] [2021-06-12 20:53:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:45,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:45,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310294917] [2021-06-12 20:53:45,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310294917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:45,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393978871] [2021-06-12 20:53:45,066 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 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 [2021-06-12 20:53:45,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 20:53:45,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:45,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:53:45,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:45,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393978871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:45,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:45,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-06-12 20:53:45,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063041319] [2021-06-12 20:53:45,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-12 20:53:45,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:45,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-12 20:53:45,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:53:45,481 INFO L87 Difference]: Start difference. First operand 345 states and 735 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:48,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:48,576 INFO L93 Difference]: Finished difference Result 1966 states and 3847 transitions. [2021-06-12 20:53:48,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-06-12 20:53:48,577 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 20:53:48,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:48,581 INFO L225 Difference]: With dead ends: 1966 [2021-06-12 20:53:48,581 INFO L226 Difference]: Without dead ends: 1630 [2021-06-12 20:53:48,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8718 ImplicationChecksByTransitivity, 2731.2ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-06-12 20:53:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-06-12 20:53:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 224. [2021-06-12 20:53:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0403587443946187) internal successors, (455), 223 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 455 transitions. [2021-06-12 20:53:48,621 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 455 transitions. Word has length 48 [2021-06-12 20:53:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:48,621 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 455 transitions. [2021-06-12 20:53:48,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:48,621 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 455 transitions. [2021-06-12 20:53:48,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-12 20:53:48,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:48,622 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:48,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:48,838 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:48,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:48,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1888843917, now seen corresponding path program 24 times [2021-06-12 20:53:48,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:48,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221994479] [2021-06-12 20:53:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:48,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:48,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221994479] [2021-06-12 20:53:48,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221994479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:48,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231441800] [2021-06-12 20:53:48,954 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 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 [2021-06-12 20:53:48,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 20:53:48,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:48,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:53:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:49,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231441800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:49,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:49,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-06-12 20:53:49,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924145278] [2021-06-12 20:53:49,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 20:53:49,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:49,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 20:53:49,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:53:49,391 INFO L87 Difference]: Start difference. First operand 224 states and 455 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:52,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:52,134 INFO L93 Difference]: Finished difference Result 1241 states and 2457 transitions. [2021-06-12 20:53:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-12 20:53:52,134 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-12 20:53:52,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:52,137 INFO L225 Difference]: With dead ends: 1241 [2021-06-12 20:53:52,137 INFO L226 Difference]: Without dead ends: 1237 [2021-06-12 20:53:52,138 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8653 ImplicationChecksByTransitivity, 2596.6ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-06-12 20:53:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-12 20:53:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 192. [2021-06-12 20:53:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.0523560209424083) internal successors, (392), 191 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 392 transitions. [2021-06-12 20:53:52,142 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 392 transitions. Word has length 48 [2021-06-12 20:53:52,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:52,142 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 392 transitions. [2021-06-12 20:53:52,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:52,142 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 392 transitions. [2021-06-12 20:53:52,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 20:53:52,143 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:52,143 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:52,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 20:53:52,347 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:52,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:52,348 INFO L82 PathProgramCache]: Analyzing trace with hash 914329853, now seen corresponding path program 25 times [2021-06-12 20:53:52,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:52,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906485414] [2021-06-12 20:53:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:52,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:52,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906485414] [2021-06-12 20:53:52,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906485414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:52,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862063094] [2021-06-12 20:53:52,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 20:53:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:52,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 20:53:52,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:52,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862063094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:52,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:52,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 20:53:52,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180439528] [2021-06-12 20:53:52,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:53:52,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:52,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:53:52,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:53:52,544 INFO L87 Difference]: Start difference. First operand 192 states and 392 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:52,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:52,650 INFO L93 Difference]: Finished difference Result 575 states and 1128 transitions. [2021-06-12 20:53:52,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:53:52,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 20:53:52,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:52,651 INFO L225 Difference]: With dead ends: 575 [2021-06-12 20:53:52,651 INFO L226 Difference]: Without dead ends: 506 [2021-06-12 20:53:52,651 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:53:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-12 20:53:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 385. [2021-06-12 20:53:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.140625) internal successors, (822), 384 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 822 transitions. [2021-06-12 20:53:52,656 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 822 transitions. Word has length 50 [2021-06-12 20:53:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:52,656 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 822 transitions. [2021-06-12 20:53:52,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 822 transitions. [2021-06-12 20:53:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 20:53:52,656 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:52,657 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:52,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 20:53:52,873 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:52,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2068558075, now seen corresponding path program 26 times [2021-06-12 20:53:52,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:52,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612854890] [2021-06-12 20:53:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:53,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:53,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612854890] [2021-06-12 20:53:53,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612854890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:53,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996849188] [2021-06-12 20:53:53,168 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 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 [2021-06-12 20:53:53,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:53:53,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:53,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:53:53,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:53,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996849188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:53,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:53,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-06-12 20:53:53,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721959019] [2021-06-12 20:53:53,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-12 20:53:53,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:53,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-12 20:53:53,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:53:53,657 INFO L87 Difference]: Start difference. First operand 385 states and 822 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:57,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:57,507 INFO L93 Difference]: Finished difference Result 2331 states and 4569 transitions. [2021-06-12 20:53:57,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-06-12 20:53:57,507 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-12 20:53:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:57,512 INFO L225 Difference]: With dead ends: 2331 [2021-06-12 20:53:57,512 INFO L226 Difference]: Without dead ends: 1923 [2021-06-12 20:53:57,513 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12499 ImplicationChecksByTransitivity, 3557.0ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-06-12 20:53:57,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-06-12 20:53:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 246. [2021-06-12 20:53:57,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0448979591836736) internal successors, (501), 245 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 501 transitions. [2021-06-12 20:53:57,520 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 501 transitions. Word has length 52 [2021-06-12 20:53:57,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:57,520 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 501 transitions. [2021-06-12 20:53:57,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:57,520 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 501 transitions. [2021-06-12 20:53:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 20:53:57,521 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:57,521 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:53:57,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 20:53:57,741 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:57,741 INFO L82 PathProgramCache]: Analyzing trace with hash -275960691, now seen corresponding path program 27 times [2021-06-12 20:53:57,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:57,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715959185] [2021-06-12 20:53:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:57,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:57,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715959185] [2021-06-12 20:53:57,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715959185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:57,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393122864] [2021-06-12 20:53:57,845 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 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 [2021-06-12 20:53:57,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 20:53:57,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:57,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:53:57,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:58,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393122864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:58,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:58,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-06-12 20:53:58,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041617687] [2021-06-12 20:53:58,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 20:53:58,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:58,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 20:53:58,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:53:58,308 INFO L87 Difference]: Start difference. First operand 246 states and 501 transitions. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:01,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:01,742 INFO L93 Difference]: Finished difference Result 1485 states and 2945 transitions. [2021-06-12 20:54:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-12 20:54:01,742 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-12 20:54:01,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:01,745 INFO L225 Difference]: With dead ends: 1485 [2021-06-12 20:54:01,745 INFO L226 Difference]: Without dead ends: 1481 [2021-06-12 20:54:01,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12396 ImplicationChecksByTransitivity, 3188.1ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-06-12 20:54:01,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-06-12 20:54:01,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 210. [2021-06-12 20:54:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0574162679425836) internal successors, (430), 209 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 430 transitions. [2021-06-12 20:54:01,752 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 430 transitions. Word has length 52 [2021-06-12 20:54:01,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:01,752 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 430 transitions. [2021-06-12 20:54:01,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:01,752 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 430 transitions. [2021-06-12 20:54:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-12 20:54:01,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:01,753 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:01,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:54:01,969 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1608264519, now seen corresponding path program 28 times [2021-06-12 20:54:01,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:01,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180596706] [2021-06-12 20:54:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:02,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:02,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180596706] [2021-06-12 20:54:02,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180596706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:02,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765544463] [2021-06-12 20:54:02,065 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 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 [2021-06-12 20:54:02,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:54:02,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:02,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:54:02,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:02,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765544463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:02,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:02,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 20:54:02,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694058485] [2021-06-12 20:54:02,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:54:02,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:02,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:54:02,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:54:02,174 INFO L87 Difference]: Start difference. First operand 210 states and 430 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:02,299 INFO L93 Difference]: Finished difference Result 634 states and 1245 transitions. [2021-06-12 20:54:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:54:02,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-12 20:54:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:02,301 INFO L225 Difference]: With dead ends: 634 [2021-06-12 20:54:02,301 INFO L226 Difference]: Without dead ends: 559 [2021-06-12 20:54:02,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:54:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-12 20:54:02,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 425. [2021-06-12 20:54:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.143867924528302) internal successors, (909), 424 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 909 transitions. [2021-06-12 20:54:02,306 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 909 transitions. Word has length 54 [2021-06-12 20:54:02,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:02,307 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 909 transitions. [2021-06-12 20:54:02,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:02,307 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 909 transitions. [2021-06-12 20:54:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:54:02,307 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:02,307 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:02,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 20:54:02,516 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:02,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:02,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1640220087, now seen corresponding path program 29 times [2021-06-12 20:54:02,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:02,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713634691] [2021-06-12 20:54:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:02,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:02,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713634691] [2021-06-12 20:54:02,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713634691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:02,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762113268] [2021-06-12 20:54:02,776 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 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 [2021-06-12 20:54:02,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 20:54:02,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:02,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:54:02,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:03,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762113268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:03,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:03,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-06-12 20:54:03,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502428051] [2021-06-12 20:54:03,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-12 20:54:03,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:03,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-12 20:54:03,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:54:03,348 INFO L87 Difference]: Start difference. First operand 425 states and 909 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:08,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:08,194 INFO L93 Difference]: Finished difference Result 2724 states and 5347 transitions. [2021-06-12 20:54:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-12 20:54:08,194 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 20:54:08,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:08,199 INFO L225 Difference]: With dead ends: 2724 [2021-06-12 20:54:08,199 INFO L226 Difference]: Without dead ends: 2238 [2021-06-12 20:54:08,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 4350.7ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-06-12 20:54:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-06-12 20:54:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 268. [2021-06-12 20:54:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.048689138576779) internal successors, (547), 267 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 547 transitions. [2021-06-12 20:54:08,211 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 547 transitions. Word has length 56 [2021-06-12 20:54:08,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:08,211 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 547 transitions. [2021-06-12 20:54:08,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 547 transitions. [2021-06-12 20:54:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:54:08,211 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:08,211 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:08,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:54:08,429 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash 205238669, now seen corresponding path program 30 times [2021-06-12 20:54:08,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:08,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390039221] [2021-06-12 20:54:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:08,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:08,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390039221] [2021-06-12 20:54:08,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390039221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:08,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695661935] [2021-06-12 20:54:08,560 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 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 [2021-06-12 20:54:08,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 20:54:08,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:08,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:54:08,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:09,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695661935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:09,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:09,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-06-12 20:54:09,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543076139] [2021-06-12 20:54:09,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 20:54:09,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:09,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 20:54:09,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:54:09,129 INFO L87 Difference]: Start difference. First operand 268 states and 547 transitions. Second operand has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:13,285 INFO L93 Difference]: Finished difference Result 1751 states and 3477 transitions. [2021-06-12 20:54:13,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-06-12 20:54:13,285 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-12 20:54:13,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:13,288 INFO L225 Difference]: With dead ends: 1751 [2021-06-12 20:54:13,288 INFO L226 Difference]: Without dead ends: 1747 [2021-06-12 20:54:13,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17241 ImplicationChecksByTransitivity, 3965.6ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-06-12 20:54:13,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-06-12 20:54:13,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 228. [2021-06-12 20:54:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0616740088105727) internal successors, (468), 227 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 468 transitions. [2021-06-12 20:54:13,295 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 468 transitions. Word has length 56 [2021-06-12 20:54:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:13,295 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 468 transitions. [2021-06-12 20:54:13,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 468 transitions. [2021-06-12 20:54:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-12 20:54:13,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:13,296 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:13,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 20:54:13,507 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:13,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:13,508 INFO L82 PathProgramCache]: Analyzing trace with hash -924210571, now seen corresponding path program 31 times [2021-06-12 20:54:13,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:13,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751606826] [2021-06-12 20:54:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:13,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:13,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751606826] [2021-06-12 20:54:13,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751606826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:13,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098701367] [2021-06-12 20:54:13,604 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 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 [2021-06-12 20:54:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:13,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:54:13,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:13,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098701367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:13,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:13,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 20:54:13,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062936721] [2021-06-12 20:54:13,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:54:13,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:13,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:54:13,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:54:13,711 INFO L87 Difference]: Start difference. First operand 228 states and 468 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:13,856 INFO L93 Difference]: Finished difference Result 693 states and 1362 transitions. [2021-06-12 20:54:13,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:54:13,856 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-12 20:54:13,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:13,857 INFO L225 Difference]: With dead ends: 693 [2021-06-12 20:54:13,857 INFO L226 Difference]: Without dead ends: 612 [2021-06-12 20:54:13,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:54:13,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-12 20:54:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 465. [2021-06-12 20:54:13,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.146551724137931) internal successors, (996), 464 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 996 transitions. [2021-06-12 20:54:13,862 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 996 transitions. Word has length 58 [2021-06-12 20:54:13,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:13,862 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 996 transitions. [2021-06-12 20:54:13,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:13,862 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 996 transitions. [2021-06-12 20:54:13,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 20:54:13,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:13,863 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:14,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 20:54:14,073 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:14,073 INFO L82 PathProgramCache]: Analyzing trace with hash -418583437, now seen corresponding path program 32 times [2021-06-12 20:54:14,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:14,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363822314] [2021-06-12 20:54:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:14,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:14,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363822314] [2021-06-12 20:54:14,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363822314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:14,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366572368] [2021-06-12 20:54:14,346 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) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:54:14,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:54:14,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:14,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 20:54:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:14,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366572368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:14,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:14,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-06-12 20:54:14,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46142100] [2021-06-12 20:54:14,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-12 20:54:14,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:14,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-12 20:54:14,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:54:14,997 INFO L87 Difference]: Start difference. First operand 465 states and 996 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:20,933 INFO L93 Difference]: Finished difference Result 3145 states and 6181 transitions. [2021-06-12 20:54:20,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-06-12 20:54:20,934 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 20:54:20,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:20,936 INFO L225 Difference]: With dead ends: 3145 [2021-06-12 20:54:20,936 INFO L226 Difference]: Without dead ends: 2575 [2021-06-12 20:54:20,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23656 ImplicationChecksByTransitivity, 5348.9ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-06-12 20:54:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2021-06-12 20:54:20,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 290. [2021-06-12 20:54:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.0519031141868513) internal successors, (593), 289 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 593 transitions. [2021-06-12 20:54:20,947 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 593 transitions. Word has length 60 [2021-06-12 20:54:20,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:20,947 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 593 transitions. [2021-06-12 20:54:20,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 593 transitions. [2021-06-12 20:54:20,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-12 20:54:20,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:20,947 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:21,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 20:54:21,164 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:21,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:21,164 INFO L82 PathProgramCache]: Analyzing trace with hash 333465485, now seen corresponding path program 33 times [2021-06-12 20:54:21,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:21,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801695110] [2021-06-12 20:54:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:21,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:21,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801695110] [2021-06-12 20:54:21,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801695110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:21,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062962983] [2021-06-12 20:54:21,318 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 [2021-06-12 20:54:21,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 20:54:21,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:21,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 20:54:21,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:21,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062962983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:21,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:21,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-06-12 20:54:21,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122597075] [2021-06-12 20:54:21,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-12 20:54:21,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:21,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-12 20:54:21,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:54:21,928 INFO L87 Difference]: Start difference. First operand 290 states and 593 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:27,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:27,120 INFO L93 Difference]: Finished difference Result 2039 states and 4053 transitions. [2021-06-12 20:54:27,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-06-12 20:54:27,120 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-12 20:54:27,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:27,122 INFO L225 Difference]: With dead ends: 2039 [2021-06-12 20:54:27,122 INFO L226 Difference]: Without dead ends: 2035 [2021-06-12 20:54:27,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23386 ImplicationChecksByTransitivity, 4923.8ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-06-12 20:54:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-06-12 20:54:27,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 246. [2021-06-12 20:54:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0653061224489795) internal successors, (506), 245 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 506 transitions. [2021-06-12 20:54:27,131 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 506 transitions. Word has length 60 [2021-06-12 20:54:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:27,131 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 506 transitions. [2021-06-12 20:54:27,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 506 transitions. [2021-06-12 20:54:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-12 20:54:27,131 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:27,131 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:27,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 20:54:27,333 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:27,333 INFO L82 PathProgramCache]: Analyzing trace with hash 545526321, now seen corresponding path program 34 times [2021-06-12 20:54:27,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:27,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298151499] [2021-06-12 20:54:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:27,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:27,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298151499] [2021-06-12 20:54:27,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298151499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:27,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056977613] [2021-06-12 20:54:27,445 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 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 [2021-06-12 20:54:27,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:54:27,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:27,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:54:27,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:27,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056977613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:27,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:27,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 20:54:27,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036439559] [2021-06-12 20:54:27,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:54:27,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:27,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:54:27,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:54:27,547 INFO L87 Difference]: Start difference. First operand 246 states and 506 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:27,705 INFO L93 Difference]: Finished difference Result 752 states and 1479 transitions. [2021-06-12 20:54:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:54:27,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-12 20:54:27,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:27,707 INFO L225 Difference]: With dead ends: 752 [2021-06-12 20:54:27,707 INFO L226 Difference]: Without dead ends: 665 [2021-06-12 20:54:27,707 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:54:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-12 20:54:27,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 505. [2021-06-12 20:54:27,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1488095238095237) internal successors, (1083), 504 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1083 transitions. [2021-06-12 20:54:27,713 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1083 transitions. Word has length 62 [2021-06-12 20:54:27,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:27,713 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1083 transitions. [2021-06-12 20:54:27,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:27,714 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1083 transitions. [2021-06-12 20:54:27,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-06-12 20:54:27,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:27,714 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:27,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 20:54:27,928 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:27,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:27,928 INFO L82 PathProgramCache]: Analyzing trace with hash 387589423, now seen corresponding path program 35 times [2021-06-12 20:54:27,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:27,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019035949] [2021-06-12 20:54:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:28,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:28,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019035949] [2021-06-12 20:54:28,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019035949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:28,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9014385] [2021-06-12 20:54:28,237 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 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 [2021-06-12 20:54:28,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 20:54:28,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:28,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:54:28,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:28,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9014385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:28,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:28,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-06-12 20:54:28,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281744018] [2021-06-12 20:54:28,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-06-12 20:54:28,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:28,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-06-12 20:54:28,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:54:28,967 INFO L87 Difference]: Start difference. First operand 505 states and 1083 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:36,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:36,219 INFO L93 Difference]: Finished difference Result 3594 states and 7071 transitions. [2021-06-12 20:54:36,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-06-12 20:54:36,219 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-06-12 20:54:36,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:36,222 INFO L225 Difference]: With dead ends: 3594 [2021-06-12 20:54:36,222 INFO L226 Difference]: Without dead ends: 2934 [2021-06-12 20:54:36,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31467 ImplicationChecksByTransitivity, 6424.2ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-06-12 20:54:36,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-06-12 20:54:36,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 312. [2021-06-12 20:54:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.054662379421222) internal successors, (639), 311 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 639 transitions. [2021-06-12 20:54:36,234 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 639 transitions. Word has length 64 [2021-06-12 20:54:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:36,234 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 639 transitions. [2021-06-12 20:54:36,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:36,234 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 639 transitions. [2021-06-12 20:54:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-06-12 20:54:36,235 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:36,235 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:36,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 20:54:36,435 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:36,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:36,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1658179955, now seen corresponding path program 36 times [2021-06-12 20:54:36,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:36,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463271401] [2021-06-12 20:54:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:36,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:36,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463271401] [2021-06-12 20:54:36,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463271401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:36,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984178653] [2021-06-12 20:54:36,640 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 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 [2021-06-12 20:54:36,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 20:54:36,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:36,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:54:36,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:37,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984178653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:37,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:37,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-06-12 20:54:37,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114181290] [2021-06-12 20:54:37,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-12 20:54:37,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:37,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-12 20:54:37,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:54:37,353 INFO L87 Difference]: Start difference. First operand 312 states and 639 transitions. Second operand has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:43,561 INFO L93 Difference]: Finished difference Result 2349 states and 4673 transitions. [2021-06-12 20:54:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-06-12 20:54:43,562 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-06-12 20:54:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:43,564 INFO L225 Difference]: With dead ends: 2349 [2021-06-12 20:54:43,564 INFO L226 Difference]: Without dead ends: 2345 [2021-06-12 20:54:43,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31046 ImplicationChecksByTransitivity, 5964.0ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-06-12 20:54:43,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-06-12 20:54:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 264. [2021-06-12 20:54:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.068441064638783) internal successors, (544), 263 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 544 transitions. [2021-06-12 20:54:43,589 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 544 transitions. Word has length 64 [2021-06-12 20:54:43,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:43,589 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 544 transitions. [2021-06-12 20:54:43,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:43,589 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 544 transitions. [2021-06-12 20:54:43,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:54:43,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:43,590 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:43,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 20:54:43,806 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:43,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:43,806 INFO L82 PathProgramCache]: Analyzing trace with hash -2111435795, now seen corresponding path program 37 times [2021-06-12 20:54:43,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:43,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594299248] [2021-06-12 20:54:43,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:43,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:43,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594299248] [2021-06-12 20:54:43,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594299248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:43,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378506337] [2021-06-12 20:54:43,928 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 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 [2021-06-12 20:54:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:43,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 20:54:43,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:44,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378506337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:44,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:44,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-12 20:54:44,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613611242] [2021-06-12 20:54:44,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:54:44,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:44,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:54:44,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:54:44,051 INFO L87 Difference]: Start difference. First operand 264 states and 544 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:44,246 INFO L93 Difference]: Finished difference Result 811 states and 1596 transitions. [2021-06-12 20:54:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:54:44,246 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-12 20:54:44,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:44,247 INFO L225 Difference]: With dead ends: 811 [2021-06-12 20:54:44,247 INFO L226 Difference]: Without dead ends: 718 [2021-06-12 20:54:44,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:54:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-12 20:54:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 545. [2021-06-12 20:54:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.150735294117647) internal successors, (1170), 544 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:44,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1170 transitions. [2021-06-12 20:54:44,252 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1170 transitions. Word has length 66 [2021-06-12 20:54:44,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:44,252 INFO L482 AbstractCegarLoop]: Abstraction has 545 states and 1170 transitions. [2021-06-12 20:54:44,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1170 transitions. [2021-06-12 20:54:44,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-06-12 20:54:44,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:44,253 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:44,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 20:54:44,469 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:44,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:44,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1230925803, now seen corresponding path program 38 times [2021-06-12 20:54:44,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:44,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486522230] [2021-06-12 20:54:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:44,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:44,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486522230] [2021-06-12 20:54:44,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486522230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:44,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069975362] [2021-06-12 20:54:44,816 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 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 [2021-06-12 20:54:44,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:54:44,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:44,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:54:44,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:45,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069975362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:45,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:45,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-06-12 20:54:45,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001178719] [2021-06-12 20:54:45,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-06-12 20:54:45,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:45,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-06-12 20:54:45,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 20:54:45,613 INFO L87 Difference]: Start difference. First operand 545 states and 1170 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:54,560 INFO L93 Difference]: Finished difference Result 4071 states and 8017 transitions. [2021-06-12 20:54:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-06-12 20:54:54,560 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-06-12 20:54:54,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:54,564 INFO L225 Difference]: With dead ends: 4071 [2021-06-12 20:54:54,565 INFO L226 Difference]: Without dead ends: 3315 [2021-06-12 20:54:54,568 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41086 ImplicationChecksByTransitivity, 7821.2ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-06-12 20:54:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-06-12 20:54:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 334. [2021-06-12 20:54:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.057057057057057) internal successors, (685), 333 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 685 transitions. [2021-06-12 20:54:54,580 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 685 transitions. Word has length 68 [2021-06-12 20:54:54,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:54,580 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 685 transitions. [2021-06-12 20:54:54,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:54,580 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 685 transitions. [2021-06-12 20:54:54,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-06-12 20:54:54,581 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:54,581 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:54:54,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:54:54,797 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:54,798 INFO L82 PathProgramCache]: Analyzing trace with hash -868702579, now seen corresponding path program 39 times [2021-06-12 20:54:54,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:54,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313505941] [2021-06-12 20:54:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:54,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:54,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313505941] [2021-06-12 20:54:54,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313505941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:54,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004841804] [2021-06-12 20:54:54,968 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 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 [2021-06-12 20:54:55,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 20:54:55,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:55,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:54:55,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:55,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004841804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:55,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:55,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-06-12 20:54:55,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156037358] [2021-06-12 20:54:55,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-12 20:54:55,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:55,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-12 20:54:55,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:54:55,682 INFO L87 Difference]: Start difference. First operand 334 states and 685 transitions. Second operand has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:03,004 INFO L93 Difference]: Finished difference Result 2681 states and 5337 transitions. [2021-06-12 20:55:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-12 20:55:03,005 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-06-12 20:55:03,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:03,008 INFO L225 Difference]: With dead ends: 2681 [2021-06-12 20:55:03,008 INFO L226 Difference]: Without dead ends: 2677 [2021-06-12 20:55:03,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40452 ImplicationChecksByTransitivity, 6976.3ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-06-12 20:55:03,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-12 20:55:03,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 282. [2021-06-12 20:55:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.0711743772241995) internal successors, (582), 281 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 582 transitions. [2021-06-12 20:55:03,020 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 582 transitions. Word has length 68 [2021-06-12 20:55:03,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:03,021 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 582 transitions. [2021-06-12 20:55:03,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:03,021 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 582 transitions. [2021-06-12 20:55:03,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-12 20:55:03,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:03,021 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:03,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:55:03,237 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash 880973737, now seen corresponding path program 40 times [2021-06-12 20:55:03,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:03,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429727786] [2021-06-12 20:55:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:03,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:03,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429727786] [2021-06-12 20:55:03,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429727786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:03,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923797268] [2021-06-12 20:55:03,389 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 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 [2021-06-12 20:55:03,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:55:03,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:03,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-12 20:55:03,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:03,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923797268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:03,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:03,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 20:55:03,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222992577] [2021-06-12 20:55:03,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:55:03,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:03,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:55:03,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:55:03,528 INFO L87 Difference]: Start difference. First operand 282 states and 582 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:03,777 INFO L93 Difference]: Finished difference Result 870 states and 1713 transitions. [2021-06-12 20:55:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:55:03,778 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-12 20:55:03,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:03,778 INFO L225 Difference]: With dead ends: 870 [2021-06-12 20:55:03,778 INFO L226 Difference]: Without dead ends: 771 [2021-06-12 20:55:03,779 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:55:03,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-06-12 20:55:03,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 585. [2021-06-12 20:55:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1523972602739727) internal successors, (1257), 584 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1257 transitions. [2021-06-12 20:55:03,784 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1257 transitions. Word has length 70 [2021-06-12 20:55:03,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:03,785 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1257 transitions. [2021-06-12 20:55:03,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1257 transitions. [2021-06-12 20:55:03,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-06-12 20:55:03,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:03,785 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:03,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 20:55:03,998 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:03,998 INFO L82 PathProgramCache]: Analyzing trace with hash 550292647, now seen corresponding path program 41 times [2021-06-12 20:55:03,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:03,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754273648] [2021-06-12 20:55:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:04,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:04,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754273648] [2021-06-12 20:55:04,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754273648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:04,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088061986] [2021-06-12 20:55:04,415 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 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 [2021-06-12 20:55:04,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 20:55:04,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:04,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:55:04,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:05,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088061986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:05,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:05,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-06-12 20:55:05,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633616367] [2021-06-12 20:55:05,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-06-12 20:55:05,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:05,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-06-12 20:55:05,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 20:55:05,372 INFO L87 Difference]: Start difference. First operand 585 states and 1257 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:16,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:16,844 INFO L93 Difference]: Finished difference Result 4576 states and 9019 transitions. [2021-06-12 20:55:16,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-06-12 20:55:16,845 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-06-12 20:55:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:16,848 INFO L225 Difference]: With dead ends: 4576 [2021-06-12 20:55:16,848 INFO L226 Difference]: Without dead ends: 3718 [2021-06-12 20:55:16,852 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52776 ImplicationChecksByTransitivity, 9876.6ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-06-12 20:55:16,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-06-12 20:55:16,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 356. [2021-06-12 20:55:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.0591549295774647) internal successors, (731), 355 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 731 transitions. [2021-06-12 20:55:16,865 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 731 transitions. Word has length 72 [2021-06-12 20:55:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:16,865 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 731 transitions. [2021-06-12 20:55:16,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 731 transitions. [2021-06-12 20:55:16,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-06-12 20:55:16,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:16,866 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:17,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:55:17,066 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:17,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:17,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1768231027, now seen corresponding path program 42 times [2021-06-12 20:55:17,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:17,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546719480] [2021-06-12 20:55:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:17,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:17,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546719480] [2021-06-12 20:55:17,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546719480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:17,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341988654] [2021-06-12 20:55:17,250 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 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 [2021-06-12 20:55:17,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-12 20:55:17,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:17,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:55:17,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:18,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341988654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:18,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:18,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-06-12 20:55:18,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483015208] [2021-06-12 20:55:18,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-12 20:55:18,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:18,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-12 20:55:18,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:55:18,056 INFO L87 Difference]: Start difference. First operand 356 states and 731 transitions. Second operand has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:27,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:27,153 INFO L93 Difference]: Finished difference Result 3035 states and 6045 transitions. [2021-06-12 20:55:27,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-06-12 20:55:27,153 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-06-12 20:55:27,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:27,155 INFO L225 Difference]: With dead ends: 3035 [2021-06-12 20:55:27,156 INFO L226 Difference]: Without dead ends: 3031 [2021-06-12 20:55:27,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51852 ImplicationChecksByTransitivity, 8458.7ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-06-12 20:55:27,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-06-12 20:55:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 300. [2021-06-12 20:55:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.0735785953177257) internal successors, (620), 299 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:27,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 620 transitions. [2021-06-12 20:55:27,173 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 620 transitions. Word has length 72 [2021-06-12 20:55:27,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:27,173 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 620 transitions. [2021-06-12 20:55:27,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:27,173 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 620 transitions. [2021-06-12 20:55:27,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-06-12 20:55:27,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:27,174 INFO L472 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:27,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:55:27,378 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:27,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:27,379 INFO L82 PathProgramCache]: Analyzing trace with hash -372460187, now seen corresponding path program 43 times [2021-06-12 20:55:27,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:27,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053883945] [2021-06-12 20:55:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:27,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:27,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053883945] [2021-06-12 20:55:27,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053883945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:27,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615496279] [2021-06-12 20:55:27,550 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 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 [2021-06-12 20:55:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:27,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-12 20:55:27,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:27,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615496279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:27,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:27,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 20:55:27,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261605187] [2021-06-12 20:55:27,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:55:27,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:27,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:55:27,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:55:27,704 INFO L87 Difference]: Start difference. First operand 300 states and 620 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:27,989 INFO L93 Difference]: Finished difference Result 929 states and 1830 transitions. [2021-06-12 20:55:27,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:55:27,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-06-12 20:55:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:27,990 INFO L225 Difference]: With dead ends: 929 [2021-06-12 20:55:27,990 INFO L226 Difference]: Without dead ends: 824 [2021-06-12 20:55:27,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:55:27,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-06-12 20:55:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 625. [2021-06-12 20:55:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.1538461538461537) internal successors, (1344), 624 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1344 transitions. [2021-06-12 20:55:27,998 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1344 transitions. Word has length 74 [2021-06-12 20:55:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:27,998 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1344 transitions. [2021-06-12 20:55:27,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:27,998 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1344 transitions. [2021-06-12 20:55:27,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:55:27,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:27,999 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:28,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 20:55:28,216 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:28,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1948763293, now seen corresponding path program 44 times [2021-06-12 20:55:28,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:28,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325537636] [2021-06-12 20:55:28,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:28,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:28,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325537636] [2021-06-12 20:55:28,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325537636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:28,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750967159] [2021-06-12 20:55:28,655 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 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 [2021-06-12 20:55:28,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:55:28,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:28,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:55:28,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:29,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750967159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:29,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:29,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-06-12 20:55:29,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356033906] [2021-06-12 20:55:29,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-06-12 20:55:29,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:29,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-06-12 20:55:29,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:55:29,708 INFO L87 Difference]: Start difference. First operand 625 states and 1344 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:42,743 INFO L93 Difference]: Finished difference Result 5109 states and 10077 transitions. [2021-06-12 20:55:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-06-12 20:55:42,744 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-12 20:55:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:42,747 INFO L225 Difference]: With dead ends: 5109 [2021-06-12 20:55:42,747 INFO L226 Difference]: Without dead ends: 4143 [2021-06-12 20:55:42,752 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66817 ImplicationChecksByTransitivity, 11225.7ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-06-12 20:55:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2021-06-12 20:55:42,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 378. [2021-06-12 20:55:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.061007957559682) internal successors, (777), 377 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 777 transitions. [2021-06-12 20:55:42,766 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 777 transitions. Word has length 76 [2021-06-12 20:55:42,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:42,766 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 777 transitions. [2021-06-12 20:55:42,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 777 transitions. [2021-06-12 20:55:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:55:42,767 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:42,767 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:42,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 20:55:42,969 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:42,969 INFO L82 PathProgramCache]: Analyzing trace with hash 122702221, now seen corresponding path program 45 times [2021-06-12 20:55:42,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:42,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424114626] [2021-06-12 20:55:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:43,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:43,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424114626] [2021-06-12 20:55:43,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424114626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:43,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482851407] [2021-06-12 20:55:43,164 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 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 [2021-06-12 20:55:43,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-06-12 20:55:43,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:43,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:55:43,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:44,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482851407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:44,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:44,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-06-12 20:55:44,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394619111] [2021-06-12 20:55:44,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-12 20:55:44,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:44,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-12 20:55:44,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:55:44,044 INFO L87 Difference]: Start difference. First operand 378 states and 777 transitions. Second operand has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:54,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:54,462 INFO L93 Difference]: Finished difference Result 3411 states and 6797 transitions. [2021-06-12 20:55:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-06-12 20:55:54,462 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-12 20:55:54,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:54,464 INFO L225 Difference]: With dead ends: 3411 [2021-06-12 20:55:54,464 INFO L226 Difference]: Without dead ends: 3407 [2021-06-12 20:55:54,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65510 ImplicationChecksByTransitivity, 9684.4ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-06-12 20:55:54,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-06-12 20:55:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 318. [2021-06-12 20:55:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.0757097791798107) internal successors, (658), 317 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:54,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 658 transitions. [2021-06-12 20:55:54,479 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 658 transitions. Word has length 76 [2021-06-12 20:55:54,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:54,479 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 658 transitions. [2021-06-12 20:55:54,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 658 transitions. [2021-06-12 20:55:54,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-06-12 20:55:54,480 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:54,480 INFO L472 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:54,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 20:55:54,693 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:54,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:54,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1078500063, now seen corresponding path program 46 times [2021-06-12 20:55:54,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:54,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789310232] [2021-06-12 20:55:54,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:54,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:54,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789310232] [2021-06-12 20:55:54,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789310232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:54,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543126920] [2021-06-12 20:55:54,868 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 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 [2021-06-12 20:55:54,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:55:54,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:54,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-12 20:55:54,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:54,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543126920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:54,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:55,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 20:55:55,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532498194] [2021-06-12 20:55:55,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:55:55,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:55,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:55:55,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:55:55,000 INFO L87 Difference]: Start difference. First operand 318 states and 658 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:55,289 INFO L93 Difference]: Finished difference Result 988 states and 1947 transitions. [2021-06-12 20:55:55,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:55:55,289 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-06-12 20:55:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:55,290 INFO L225 Difference]: With dead ends: 988 [2021-06-12 20:55:55,290 INFO L226 Difference]: Without dead ends: 877 [2021-06-12 20:55:55,290 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:55:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-06-12 20:55:55,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 665. [2021-06-12 20:55:55,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.1551204819277108) internal successors, (1431), 664 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:55,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1431 transitions. [2021-06-12 20:55:55,296 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1431 transitions. Word has length 78 [2021-06-12 20:55:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:55,296 INFO L482 AbstractCegarLoop]: Abstraction has 665 states and 1431 transitions. [2021-06-12 20:55:55,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:55,296 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1431 transitions. [2021-06-12 20:55:55,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 20:55:55,297 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:55,297 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:55:55,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:55:55,501 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:55,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:55,501 INFO L82 PathProgramCache]: Analyzing trace with hash -999048161, now seen corresponding path program 47 times [2021-06-12 20:55:55,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:55,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484862615] [2021-06-12 20:55:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:56,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:56,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484862615] [2021-06-12 20:55:56,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484862615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:56,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038847834] [2021-06-12 20:55:56,029 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 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 [2021-06-12 20:55:56,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-06-12 20:55:56,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:56,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 20:55:56,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:55:57,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038847834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:57,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:57,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-06-12 20:55:57,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902258431] [2021-06-12 20:55:57,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-06-12 20:55:57,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:57,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-06-12 20:55:57,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 20:55:57,073 INFO L87 Difference]: Start difference. First operand 665 states and 1431 transitions. Second operand has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:11,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:56:11,918 INFO L93 Difference]: Finished difference Result 5670 states and 11191 transitions. [2021-06-12 20:56:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-06-12 20:56:11,920 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 20:56:11,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:56:11,923 INFO L225 Difference]: With dead ends: 5670 [2021-06-12 20:56:11,924 INFO L226 Difference]: Without dead ends: 4590 [2021-06-12 20:56:11,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83508 ImplicationChecksByTransitivity, 12611.3ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-06-12 20:56:11,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2021-06-12 20:56:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 400. [2021-06-12 20:56:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.06265664160401) internal successors, (823), 399 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 823 transitions. [2021-06-12 20:56:11,945 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 823 transitions. Word has length 80 [2021-06-12 20:56:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:56:11,946 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 823 transitions. [2021-06-12 20:56:11,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 823 transitions. [2021-06-12 20:56:11,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-12 20:56:11,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:56:11,946 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:56:12,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 20:56:12,147 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:56:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:56:12,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2100824947, now seen corresponding path program 48 times [2021-06-12 20:56:12,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:56:12,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525578580] [2021-06-12 20:56:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:56:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:56:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:12,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:56:12,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525578580] [2021-06-12 20:56:12,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525578580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:12,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102812908] [2021-06-12 20:56:12,372 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:56:12,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-06-12 20:56:12,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:56:12,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 20:56:12,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:56:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:13,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102812908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:13,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:56:13,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-06-12 20:56:13,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38786172] [2021-06-12 20:56:13,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-12 20:56:13,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:56:13,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-12 20:56:13,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:56:13,362 INFO L87 Difference]: Start difference. First operand 400 states and 823 transitions. Second operand has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:24,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:56:24,950 INFO L93 Difference]: Finished difference Result 3809 states and 7593 transitions. [2021-06-12 20:56:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-06-12 20:56:24,950 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-12 20:56:24,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:56:24,953 INFO L225 Difference]: With dead ends: 3809 [2021-06-12 20:56:24,953 INFO L226 Difference]: Without dead ends: 3805 [2021-06-12 20:56:24,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81707 ImplicationChecksByTransitivity, 11004.0ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-06-12 20:56:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-06-12 20:56:24,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 336. [2021-06-12 20:56:24,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.0776119402985076) internal successors, (696), 335 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:24,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 696 transitions. [2021-06-12 20:56:24,969 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 696 transitions. Word has length 80 [2021-06-12 20:56:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:56:24,969 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 696 transitions. [2021-06-12 20:56:24,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:24,970 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 696 transitions. [2021-06-12 20:56:24,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-06-12 20:56:24,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:56:24,970 INFO L472 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:56:25,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:56:25,175 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:56:25,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:56:25,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1064675037, now seen corresponding path program 49 times [2021-06-12 20:56:25,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:56:25,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645910252] [2021-06-12 20:56:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:56:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:56:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:25,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:56:25,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645910252] [2021-06-12 20:56:25,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645910252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:25,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392656622] [2021-06-12 20:56:25,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 20:56:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:56:25,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 71 conjunts are in the unsatisfiable core [2021-06-12 20:56:25,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:56:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:25,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392656622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:25,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:56:25,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-06-12 20:56:25,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874477172] [2021-06-12 20:56:25,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:56:25,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:56:25,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:56:25,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:56:25,485 INFO L87 Difference]: Start difference. First operand 336 states and 696 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:25,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:56:25,809 INFO L93 Difference]: Finished difference Result 1047 states and 2064 transitions. [2021-06-12 20:56:25,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:56:25,809 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-06-12 20:56:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:56:25,810 INFO L225 Difference]: With dead ends: 1047 [2021-06-12 20:56:25,810 INFO L226 Difference]: Without dead ends: 930 [2021-06-12 20:56:25,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:56:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-12 20:56:25,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 705. [2021-06-12 20:56:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.15625) internal successors, (1518), 704 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1518 transitions. [2021-06-12 20:56:25,816 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1518 transitions. Word has length 82 [2021-06-12 20:56:25,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:56:25,816 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 1518 transitions. [2021-06-12 20:56:25,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:25,816 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1518 transitions. [2021-06-12 20:56:25,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-06-12 20:56:25,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:56:25,817 INFO L472 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:56:26,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:56:26,033 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:56:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:56:26,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1343377115, now seen corresponding path program 50 times [2021-06-12 20:56:26,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:56:26,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533046876] [2021-06-12 20:56:26,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:56:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:56:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:26,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:56:26,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533046876] [2021-06-12 20:56:26,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533046876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:26,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733424056] [2021-06-12 20:56:26,575 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 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 [2021-06-12 20:56:26,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:56:26,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:56:26,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 20:56:26,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:56:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:27,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733424056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:27,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:56:27,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-06-12 20:56:27,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457880569] [2021-06-12 20:56:27,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-06-12 20:56:27,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:56:27,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-06-12 20:56:27,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 20:56:27,710 INFO L87 Difference]: Start difference. First operand 705 states and 1518 transitions. Second operand has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:56:44,793 INFO L93 Difference]: Finished difference Result 6259 states and 12361 transitions. [2021-06-12 20:56:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-06-12 20:56:44,793 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-06-12 20:56:44,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:56:44,796 INFO L225 Difference]: With dead ends: 6259 [2021-06-12 20:56:44,796 INFO L226 Difference]: Without dead ends: 5059 [2021-06-12 20:56:44,804 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103165 ImplicationChecksByTransitivity, 14582.2ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-06-12 20:56:44,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5059 states. [2021-06-12 20:56:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5059 to 422. [2021-06-12 20:56:44,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0641330166270784) internal successors, (869), 421 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 869 transitions. [2021-06-12 20:56:44,818 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 869 transitions. Word has length 84 [2021-06-12 20:56:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:56:44,818 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 869 transitions. [2021-06-12 20:56:44,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:44,819 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 869 transitions. [2021-06-12 20:56:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-06-12 20:56:44,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:56:44,819 INFO L472 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:56:45,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-12 20:56:45,020 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:56:45,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:56:45,020 INFO L82 PathProgramCache]: Analyzing trace with hash 182530189, now seen corresponding path program 51 times [2021-06-12 20:56:45,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:56:45,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875060162] [2021-06-12 20:56:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:56:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:56:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:45,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:56:45,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875060162] [2021-06-12 20:56:45,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875060162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:45,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572192576] [2021-06-12 20:56:45,263 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 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 [2021-06-12 20:56:45,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-06-12 20:56:45,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:56:45,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 20:56:45,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:56:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:56:46,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572192576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:46,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:56:46,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-06-12 20:56:46,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632537096] [2021-06-12 20:56:46,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-12 20:56:46,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:56:46,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-12 20:56:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:56:46,326 INFO L87 Difference]: Start difference. First operand 422 states and 869 transitions. Second operand has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:57:00,123 INFO L93 Difference]: Finished difference Result 4229 states and 8433 transitions. [2021-06-12 20:57:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-06-12 20:57:00,124 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-06-12 20:57:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:57:00,127 INFO L225 Difference]: With dead ends: 4229 [2021-06-12 20:57:00,127 INFO L226 Difference]: Without dead ends: 4225 [2021-06-12 20:57:00,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100740 ImplicationChecksByTransitivity, 12744.5ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-06-12 20:57:00,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-06-12 20:57:00,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 354. [2021-06-12 20:57:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.0793201133144477) internal successors, (734), 353 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:00,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 734 transitions. [2021-06-12 20:57:00,146 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 734 transitions. Word has length 84 [2021-06-12 20:57:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:57:00,147 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 734 transitions. [2021-06-12 20:57:00,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:00,147 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 734 transitions. [2021-06-12 20:57:00,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-12 20:57:00,147 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:57:00,147 INFO L472 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:57:00,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:57:00,348 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:57:00,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:57:00,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1572502169, now seen corresponding path program 52 times [2021-06-12 20:57:00,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:57:00,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284493572] [2021-06-12 20:57:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:57:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:57:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:00,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:57:00,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284493572] [2021-06-12 20:57:00,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284493572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:00,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107553334] [2021-06-12 20:57:00,557 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 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 [2021-06-12 20:57:00,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:57:00,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:57:00,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-12 20:57:00,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:57:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:00,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107553334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:00,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:57:00,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-06-12 20:57:00,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189420612] [2021-06-12 20:57:00,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:57:00,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:57:00,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:57:00,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:57:00,699 INFO L87 Difference]: Start difference. First operand 354 states and 734 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:01,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:57:01,108 INFO L93 Difference]: Finished difference Result 1106 states and 2181 transitions. [2021-06-12 20:57:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:57:01,108 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-12 20:57:01,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:57:01,109 INFO L225 Difference]: With dead ends: 1106 [2021-06-12 20:57:01,109 INFO L226 Difference]: Without dead ends: 983 [2021-06-12 20:57:01,109 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:57:01,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-12 20:57:01,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 745. [2021-06-12 20:57:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.157258064516129) internal successors, (1605), 744 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:01,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1605 transitions. [2021-06-12 20:57:01,116 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1605 transitions. Word has length 86 [2021-06-12 20:57:01,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:57:01,117 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 1605 transitions. [2021-06-12 20:57:01,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:01,117 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1605 transitions. [2021-06-12 20:57:01,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-06-12 20:57:01,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:57:01,118 INFO L472 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:57:01,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 20:57:01,325 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:57:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:57:01,325 INFO L82 PathProgramCache]: Analyzing trace with hash -5835881, now seen corresponding path program 53 times [2021-06-12 20:57:01,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:57:01,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900433595] [2021-06-12 20:57:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:57:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:57:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:01,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:57:01,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900433595] [2021-06-12 20:57:01,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900433595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:01,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219108663] [2021-06-12 20:57:01,917 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 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 [2021-06-12 20:57:01,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-06-12 20:57:01,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:57:01,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:57:01,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:57:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:03,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219108663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:03,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:57:03,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-06-12 20:57:03,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556836321] [2021-06-12 20:57:03,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-06-12 20:57:03,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:57:03,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-06-12 20:57:03,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 20:57:03,171 INFO L87 Difference]: Start difference. First operand 745 states and 1605 transitions. Second operand has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:23,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:57:23,091 INFO L93 Difference]: Finished difference Result 6876 states and 13587 transitions. [2021-06-12 20:57:23,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-06-12 20:57:23,092 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-06-12 20:57:23,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:57:23,095 INFO L225 Difference]: With dead ends: 6876 [2021-06-12 20:57:23,096 INFO L226 Difference]: Without dead ends: 5550 [2021-06-12 20:57:23,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126123 ImplicationChecksByTransitivity, 16883.5ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-06-12 20:57:23,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2021-06-12 20:57:23,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 444. [2021-06-12 20:57:23,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:23,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2021-06-12 20:57:23,120 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 88 [2021-06-12 20:57:23,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:57:23,120 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2021-06-12 20:57:23,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:23,121 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2021-06-12 20:57:23,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-06-12 20:57:23,121 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:57:23,121 INFO L472 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:57:23,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 20:57:23,336 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:57:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:57:23,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2098512499, now seen corresponding path program 54 times [2021-06-12 20:57:23,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:57:23,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784970029] [2021-06-12 20:57:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:57:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:57:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:23,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:57:23,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784970029] [2021-06-12 20:57:23,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784970029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:23,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752603270] [2021-06-12 20:57:23,579 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 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 [2021-06-12 20:57:23,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-06-12 20:57:23,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:57:23,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:57:23,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:57:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:24,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752603270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:24,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:57:24,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-06-12 20:57:24,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815410636] [2021-06-12 20:57:24,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-06-12 20:57:24,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:57:24,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-06-12 20:57:24,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:57:24,816 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:57:40,405 INFO L93 Difference]: Finished difference Result 4671 states and 9317 transitions. [2021-06-12 20:57:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-06-12 20:57:40,407 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-06-12 20:57:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:57:40,410 INFO L225 Difference]: With dead ends: 4671 [2021-06-12 20:57:40,410 INFO L226 Difference]: Without dead ends: 4667 [2021-06-12 20:57:40,419 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122923 ImplicationChecksByTransitivity, 14558.9ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-06-12 20:57:40,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-06-12 20:57:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 372. [2021-06-12 20:57:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.0808625336927222) internal successors, (772), 371 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 772 transitions. [2021-06-12 20:57:40,433 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 772 transitions. Word has length 88 [2021-06-12 20:57:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:57:40,433 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 772 transitions. [2021-06-12 20:57:40,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 772 transitions. [2021-06-12 20:57:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-12 20:57:40,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:57:40,434 INFO L472 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:57:40,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:57:40,653 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:57:40,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:57:40,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2058936405, now seen corresponding path program 55 times [2021-06-12 20:57:40,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:57:40,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982793715] [2021-06-12 20:57:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:57:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:57:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:40,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:57:40,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982793715] [2021-06-12 20:57:40,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982793715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:40,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275326748] [2021-06-12 20:57:40,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 20:57:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:57:40,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 79 conjunts are in the unsatisfiable core [2021-06-12 20:57:40,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:57:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:41,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275326748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:41,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:57:41,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-12 20:57:41,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297289223] [2021-06-12 20:57:41,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:57:41,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:57:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:57:41,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:57:41,066 INFO L87 Difference]: Start difference. First operand 372 states and 772 transitions. Second operand has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:57:41,478 INFO L93 Difference]: Finished difference Result 1165 states and 2298 transitions. [2021-06-12 20:57:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:57:41,478 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-12 20:57:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:57:41,479 INFO L225 Difference]: With dead ends: 1165 [2021-06-12 20:57:41,479 INFO L226 Difference]: Without dead ends: 1036 [2021-06-12 20:57:41,479 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:57:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-06-12 20:57:41,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 785. [2021-06-12 20:57:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.1581632653061225) internal successors, (1692), 784 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1692 transitions. [2021-06-12 20:57:41,486 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1692 transitions. Word has length 90 [2021-06-12 20:57:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:57:41,486 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 1692 transitions. [2021-06-12 20:57:41,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:41,486 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1692 transitions. [2021-06-12 20:57:41,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-06-12 20:57:41,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:57:41,487 INFO L472 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:57:41,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 20:57:41,687 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:57:41,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:57:41,688 INFO L82 PathProgramCache]: Analyzing trace with hash -274421165, now seen corresponding path program 56 times [2021-06-12 20:57:41,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:57:41,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441466101] [2021-06-12 20:57:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:57:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:57:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:42,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:57:42,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441466101] [2021-06-12 20:57:42,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441466101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:42,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521827755] [2021-06-12 20:57:42,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 20:57:42,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:57:42,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:57:42,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:57:42,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:57:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:57:43,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521827755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:43,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:57:43,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-06-12 20:57:43,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174801587] [2021-06-12 20:57:43,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-06-12 20:57:43,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:57:43,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-06-12 20:57:43,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 20:57:43,662 INFO L87 Difference]: Start difference. First operand 785 states and 1692 transitions. Second operand has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:58:06,805 INFO L93 Difference]: Finished difference Result 7521 states and 14869 transitions. [2021-06-12 20:58:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-06-12 20:58:06,805 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-06-12 20:58:06,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:58:06,810 INFO L225 Difference]: With dead ends: 7521 [2021-06-12 20:58:06,810 INFO L226 Difference]: Without dead ends: 6063 [2021-06-12 20:58:06,820 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152734 ImplicationChecksByTransitivity, 19511.0ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-06-12 20:58:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-06-12 20:58:06,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 466. [2021-06-12 20:58:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.066666666666667) internal successors, (961), 465 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 961 transitions. [2021-06-12 20:58:06,840 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 961 transitions. Word has length 92 [2021-06-12 20:58:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:58:06,840 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 961 transitions. [2021-06-12 20:58:06,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:06,840 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 961 transitions. [2021-06-12 20:58:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-06-12 20:58:06,841 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:58:06,841 INFO L472 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:58:07,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:58:07,057 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:58:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:58:07,057 INFO L82 PathProgramCache]: Analyzing trace with hash -207266931, now seen corresponding path program 57 times [2021-06-12 20:58:07,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:58:07,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808082263] [2021-06-12 20:58:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:58:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:58:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:07,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:58:07,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808082263] [2021-06-12 20:58:07,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808082263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:07,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99502222] [2021-06-12 20:58:07,351 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 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 [2021-06-12 20:58:07,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-06-12 20:58:07,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:58:07,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:58:07,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:58:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:08,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99502222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:08,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:58:08,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-06-12 20:58:08,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348229586] [2021-06-12 20:58:08,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-06-12 20:58:08,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:58:08,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-06-12 20:58:08,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 20:58:08,610 INFO L87 Difference]: Start difference. First operand 466 states and 961 transitions. Second operand has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:58:26,420 INFO L93 Difference]: Finished difference Result 5135 states and 10245 transitions. [2021-06-12 20:58:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2021-06-12 20:58:26,420 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-06-12 20:58:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:58:26,424 INFO L225 Difference]: With dead ends: 5135 [2021-06-12 20:58:26,424 INFO L226 Difference]: Without dead ends: 5131 [2021-06-12 20:58:26,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148586 ImplicationChecksByTransitivity, 16557.0ms TimeCoverageRelationStatistics Valid=70583, Invalid=228079, Unknown=0, NotChecked=0, Total=298662 [2021-06-12 20:58:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-06-12 20:58:26,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 390. [2021-06-12 20:58:26,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.082262210796915) internal successors, (810), 389 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:26,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 810 transitions. [2021-06-12 20:58:26,447 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 810 transitions. Word has length 92 [2021-06-12 20:58:26,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:58:26,447 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 810 transitions. [2021-06-12 20:58:26,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 810 transitions. [2021-06-12 20:58:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-06-12 20:58:26,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:58:26,448 INFO L472 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:58:26,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 20:58:26,653 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:58:26,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:58:26,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1646516241, now seen corresponding path program 58 times [2021-06-12 20:58:26,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:58:26,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846817513] [2021-06-12 20:58:26,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:58:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:58:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:26,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:58:26,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846817513] [2021-06-12 20:58:26,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846817513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:26,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075562138] [2021-06-12 20:58:26,885 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 [2021-06-12 20:58:26,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:58:26,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:58:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 83 conjunts are in the unsatisfiable core [2021-06-12 20:58:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:58:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:27,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075562138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:27,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:58:27,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-12 20:58:27,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470186053] [2021-06-12 20:58:27,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:58:27,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:58:27,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:58:27,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:58:27,040 INFO L87 Difference]: Start difference. First operand 390 states and 810 transitions. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:27,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:58:27,491 INFO L93 Difference]: Finished difference Result 1224 states and 2415 transitions. [2021-06-12 20:58:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:58:27,492 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-06-12 20:58:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:58:27,493 INFO L225 Difference]: With dead ends: 1224 [2021-06-12 20:58:27,493 INFO L226 Difference]: Without dead ends: 1089 [2021-06-12 20:58:27,493 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:58:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-12 20:58:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 825. [2021-06-12 20:58:27,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.158980582524272) internal successors, (1779), 824 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1779 transitions. [2021-06-12 20:58:27,501 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1779 transitions. Word has length 94 [2021-06-12 20:58:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:58:27,501 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 1779 transitions. [2021-06-12 20:58:27,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:27,501 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1779 transitions. [2021-06-12 20:58:27,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:58:27,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:58:27,502 INFO L472 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:58:27,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:58:27,713 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:58:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:58:27,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2013367537, now seen corresponding path program 59 times [2021-06-12 20:58:27,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:58:27,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402435361] [2021-06-12 20:58:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:58:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:58:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:28,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:58:28,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402435361] [2021-06-12 20:58:28,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402435361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:28,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217742440] [2021-06-12 20:58:28,475 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 [2021-06-12 20:58:28,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-06-12 20:58:28,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:58:28,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 20:58:28,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:58:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:29,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217742440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:29,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:58:29,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-06-12 20:58:29,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701913404] [2021-06-12 20:58:29,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-06-12 20:58:29,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:58:29,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-06-12 20:58:29,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=6655, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 20:58:29,956 INFO L87 Difference]: Start difference. First operand 825 states and 1779 transitions. Second operand has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:58:57,499 INFO L93 Difference]: Finished difference Result 8194 states and 16207 transitions. [2021-06-12 20:58:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 529 states. [2021-06-12 20:58:57,499 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-12 20:58:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:58:57,504 INFO L225 Difference]: With dead ends: 8194 [2021-06-12 20:58:57,504 INFO L226 Difference]: Without dead ends: 6598 [2021-06-12 20:58:57,516 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183369 ImplicationChecksByTransitivity, 22547.1ms TimeCoverageRelationStatistics Valid=106395, Invalid=271215, Unknown=0, NotChecked=0, Total=377610 [2021-06-12 20:58:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2021-06-12 20:58:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 488. [2021-06-12 20:58:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.0677618069815193) internal successors, (1007), 487 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1007 transitions. [2021-06-12 20:58:57,537 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1007 transitions. Word has length 96 [2021-06-12 20:58:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:58:57,538 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1007 transitions. [2021-06-12 20:58:57,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:57,538 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1007 transitions. [2021-06-12 20:58:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:58:57,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:58:57,538 INFO L472 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:58:57,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-12 20:58:57,739 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:58:57,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:58:57,739 INFO L82 PathProgramCache]: Analyzing trace with hash -817968499, now seen corresponding path program 60 times [2021-06-12 20:58:57,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:58:57,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069528484] [2021-06-12 20:58:57,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:58:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:58:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:58,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:58:58,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069528484] [2021-06-12 20:58:58,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069528484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:58,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215193210] [2021-06-12 20:58:58,033 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 [2021-06-12 20:58:58,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-06-12 20:58:58,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:58:58,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 20:58:58,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:58:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:58:59,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215193210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:59,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:58:59,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 68 [2021-06-12 20:58:59,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692257983] [2021-06-12 20:58:59,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-06-12 20:58:59,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:58:59,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-06-12 20:58:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=3799, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:58:59,412 INFO L87 Difference]: Start difference. First operand 488 states and 1007 transitions. Second operand has 69 states, 69 states have (on average 2.63768115942029) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:19,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:19,334 INFO L93 Difference]: Finished difference Result 5621 states and 11217 transitions. [2021-06-12 20:59:19,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 530 states. [2021-06-12 20:59:19,334 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.63768115942029) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-12 20:59:19,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:19,338 INFO L225 Difference]: With dead ends: 5621 [2021-06-12 20:59:19,338 INFO L226 Difference]: Without dead ends: 5617 [2021-06-12 20:59:19,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 593 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178076 ImplicationChecksByTransitivity, 18555.4ms TimeCoverageRelationStatistics Valid=83624, Invalid=269806, Unknown=0, NotChecked=0, Total=353430 [2021-06-12 20:59:19,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2021-06-12 20:59:19,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 408. [2021-06-12 20:59:19,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0835380835380835) internal successors, (848), 407 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 848 transitions. [2021-06-12 20:59:19,367 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 848 transitions. Word has length 96 [2021-06-12 20:59:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:19,367 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 848 transitions. [2021-06-12 20:59:19,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.63768115942029) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:19,368 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 848 transitions. [2021-06-12 20:59:19,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-06-12 20:59:19,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:19,368 INFO L472 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:19,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:19,569 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:19,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:19,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1261330893, now seen corresponding path program 61 times [2021-06-12 20:59:19,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:19,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54879586] [2021-06-12 20:59:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:19,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:19,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54879586] [2021-06-12 20:59:19,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54879586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:19,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364538215] [2021-06-12 20:59:19,825 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 [2021-06-12 20:59:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:19,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 87 conjunts are in the unsatisfiable core [2021-06-12 20:59:19,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:20,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364538215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:20,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:20,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-12 20:59:20,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261732598] [2021-06-12 20:59:20,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:59:20,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:20,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:59:20,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:59:20,010 INFO L87 Difference]: Start difference. First operand 408 states and 848 transitions. Second operand has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:20,518 INFO L93 Difference]: Finished difference Result 1283 states and 2532 transitions. [2021-06-12 20:59:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:59:20,518 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-06-12 20:59:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:20,519 INFO L225 Difference]: With dead ends: 1283 [2021-06-12 20:59:20,520 INFO L226 Difference]: Without dead ends: 1142 [2021-06-12 20:59:20,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:59:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-06-12 20:59:20,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 865. [2021-06-12 20:59:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.1597222222222223) internal successors, (1866), 864 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1866 transitions. [2021-06-12 20:59:20,527 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1866 transitions. Word has length 98 [2021-06-12 20:59:20,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:20,527 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 1866 transitions. [2021-06-12 20:59:20,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:20,527 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1866 transitions. [2021-06-12 20:59:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 20:59:20,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:20,528 INFO L472 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:20,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 20:59:20,729 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:20,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2082950603, now seen corresponding path program 62 times [2021-06-12 20:59:20,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:20,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101833009] [2021-06-12 20:59:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:21,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:21,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101833009] [2021-06-12 20:59:21,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101833009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:21,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886362652] [2021-06-12 20:59:21,460 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 [2021-06-12 20:59:21,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:21,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:21,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:59:21,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:23,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886362652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:23,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:23,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 93 [2021-06-12 20:59:23,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061629636] [2021-06-12 20:59:23,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-06-12 20:59:23,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:23,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-06-12 20:59:23,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1474, Invalid=7268, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 20:59:23,116 INFO L87 Difference]: Start difference. First operand 865 states and 1866 transitions. Second operand has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:53,349 INFO L93 Difference]: Finished difference Result 8895 states and 17601 transitions. [2021-06-12 20:59:53,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2021-06-12 20:59:53,361 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 20:59:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:53,367 INFO L225 Difference]: With dead ends: 8895 [2021-06-12 20:59:53,367 INFO L226 Difference]: Without dead ends: 7155 [2021-06-12 20:59:53,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218416 ImplicationChecksByTransitivity, 25113.4ms TimeCoverageRelationStatistics Valid=125365, Invalid=317525, Unknown=0, NotChecked=0, Total=442890 [2021-06-12 20:59:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7155 states. [2021-06-12 20:59:53,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7155 to 510. [2021-06-12 20:59:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.068762278978389) internal successors, (1053), 509 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1053 transitions. [2021-06-12 20:59:53,408 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1053 transitions. Word has length 100 [2021-06-12 20:59:53,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:53,408 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1053 transitions. [2021-06-12 20:59:53,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1053 transitions. [2021-06-12 20:59:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-12 20:59:53,409 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:53,409 INFO L472 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:53,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:53,610 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:59:53,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:53,610 INFO L82 PathProgramCache]: Analyzing trace with hash 894880397, now seen corresponding path program 63 times [2021-06-12 20:59:53,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:53,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719741689] [2021-06-12 20:59:53,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:53,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:53,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719741689] [2021-06-12 20:59:53,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719741689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:53,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009217908] [2021-06-12 20:59:53,971 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 [2021-06-12 20:59:54,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-06-12 20:59:54,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:54,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 20:59:54,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:55,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009217908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:55,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:55,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47] total 71 [2021-06-12 20:59:55,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208021002] [2021-06-12 20:59:55,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-06-12 20:59:55,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:55,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-06-12 20:59:55,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=4144, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 20:59:55,401 INFO L87 Difference]: Start difference. First operand 510 states and 1053 transitions. Second operand has 72 states, 72 states have (on average 2.638888888888889) internal successors, (190), 71 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:07,659 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-06-12 21:00:20,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:20,129 INFO L93 Difference]: Finished difference Result 6129 states and 12233 transitions. [2021-06-12 21:00:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 577 states. [2021-06-12 21:00:20,130 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.638888888888889) internal successors, (190), 71 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-12 21:00:20,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:20,134 INFO L225 Difference]: With dead ends: 6129 [2021-06-12 21:00:20,134 INFO L226 Difference]: Without dead ends: 6125 [2021-06-12 21:00:20,148 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 643 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211756 ImplicationChecksByTransitivity, 22848.4ms TimeCoverageRelationStatistics Valid=98396, Invalid=316984, Unknown=0, NotChecked=0, Total=415380 [2021-06-12 21:00:20,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2021-06-12 21:00:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 426. [2021-06-12 21:00:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.084705882352941) internal successors, (886), 425 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 886 transitions. [2021-06-12 21:00:20,166 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 886 transitions. Word has length 100 [2021-06-12 21:00:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:20,167 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 886 transitions. [2021-06-12 21:00:20,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.638888888888889) internal successors, (190), 71 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 886 transitions. [2021-06-12 21:00:20,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-06-12 21:00:20,167 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:20,167 INFO L472 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:20,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 21:00:20,385 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:20,385 INFO L82 PathProgramCache]: Analyzing trace with hash -661946999, now seen corresponding path program 64 times [2021-06-12 21:00:20,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:20,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781951761] [2021-06-12 21:00:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:00:20,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:20,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781951761] [2021-06-12 21:00:20,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781951761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:20,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157085232] [2021-06-12 21:00:20,711 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 [2021-06-12 21:00:20,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:00:20,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:20,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 91 conjunts are in the unsatisfiable core [2021-06-12 21:00:20,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:00:20,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157085232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:20,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:20,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-12 21:00:20,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481306931] [2021-06-12 21:00:20,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:00:20,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:20,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:00:20,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:00:20,933 INFO L87 Difference]: Start difference. First operand 426 states and 886 transitions. Second operand has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:21,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:21,575 INFO L93 Difference]: Finished difference Result 1342 states and 2649 transitions. [2021-06-12 21:00:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:00:21,575 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-06-12 21:00:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:21,576 INFO L225 Difference]: With dead ends: 1342 [2021-06-12 21:00:21,576 INFO L226 Difference]: Without dead ends: 1195 [2021-06-12 21:00:21,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:00:21,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-06-12 21:00:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 905. [2021-06-12 21:00:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.1603982300884956) internal successors, (1953), 904 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1953 transitions. [2021-06-12 21:00:21,584 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1953 transitions. Word has length 102 [2021-06-12 21:00:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:21,584 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 1953 transitions. [2021-06-12 21:00:21,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1953 transitions. [2021-06-12 21:00:21,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-06-12 21:00:21,585 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:21,585 INFO L472 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:21,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 21:00:21,786 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:00:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:21,786 INFO L82 PathProgramCache]: Analyzing trace with hash -887997817, now seen corresponding path program 65 times [2021-06-12 21:00:21,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:21,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408419359] [2021-06-12 21:00:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:00:22,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:22,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408419359] [2021-06-12 21:00:22,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408419359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:22,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231440905] [2021-06-12 21:00:22,643 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 [2021-06-12 21:00:22,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-06-12 21:00:22,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:22,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 21:00:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:00:24,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231440905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:24,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:24,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 97 [2021-06-12 21:00:24,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705866515] [2021-06-12 21:00:24,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-06-12 21:00:24,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:24,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-06-12 21:00:24,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=7908, Unknown=0, NotChecked=0, Total=9506 [2021-06-12 21:00:24,432 INFO L87 Difference]: Start difference. First operand 905 states and 1953 transitions. Second operand has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:01,471 INFO L93 Difference]: Finished difference Result 9624 states and 19051 transitions. [2021-06-12 21:01:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 625 states. [2021-06-12 21:01:01,472 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-06-12 21:01:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:01,478 INFO L225 Difference]: With dead ends: 9624 [2021-06-12 21:01:01,479 INFO L226 Difference]: Without dead ends: 7734 [2021-06-12 21:01:01,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258282 ImplicationChecksByTransitivity, 30003.9ms TimeCoverageRelationStatistics Valid=146772, Invalid=369470, Unknown=0, NotChecked=0, Total=516242 [2021-06-12 21:01:01,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7734 states. [2021-06-12 21:01:01,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7734 to 532. [2021-06-12 21:01:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0696798493408664) internal successors, (1099), 531 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:01,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1099 transitions. [2021-06-12 21:01:01,525 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1099 transitions. Word has length 104 [2021-06-12 21:01:01,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:01,525 INFO L482 AbstractCegarLoop]: Abstraction has 532 states and 1099 transitions. [2021-06-12 21:01:01,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:01,526 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1099 transitions. [2021-06-12 21:01:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-06-12 21:01:01,526 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:01,526 INFO L472 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:01,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 21:01:01,727 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:01,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:01,727 INFO L82 PathProgramCache]: Analyzing trace with hash 922524557, now seen corresponding path program 66 times [2021-06-12 21:01:01,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:01,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344668335] [2021-06-12 21:01:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:02,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:02,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344668335] [2021-06-12 21:01:02,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344668335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:02,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996913154] [2021-06-12 21:01:02,074 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 [2021-06-12 21:01:02,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-06-12 21:01:02,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:02,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 21:01:02,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:03,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996913154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:03,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:03,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49] total 74 [2021-06-12 21:01:03,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840340458] [2021-06-12 21:01:03,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-06-12 21:01:03,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:03,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-06-12 21:01:03,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1046, Invalid=4504, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 21:01:03,778 INFO L87 Difference]: Start difference. First operand 532 states and 1099 transitions. Second operand has 75 states, 75 states have (on average 2.64) internal successors, (198), 74 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:30,600 INFO L93 Difference]: Finished difference Result 6659 states and 13293 transitions. [2021-06-12 21:01:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 626 states. [2021-06-12 21:01:30,601 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.64) internal successors, (198), 74 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-06-12 21:01:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:30,606 INFO L225 Difference]: With dead ends: 6659 [2021-06-12 21:01:30,606 INFO L226 Difference]: Without dead ends: 6655 [2021-06-12 21:01:30,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 695 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250006 ImplicationChecksByTransitivity, 24766.6ms TimeCoverageRelationStatistics Valid=115046, Invalid=370066, Unknown=0, NotChecked=0, Total=485112 [2021-06-12 21:01:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6655 states. [2021-06-12 21:01:30,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6655 to 444. [2021-06-12 21:01:30,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0857787810383748) internal successors, (924), 443 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 924 transitions. [2021-06-12 21:01:30,686 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 924 transitions. Word has length 104 [2021-06-12 21:01:30,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:30,686 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 924 transitions. [2021-06-12 21:01:30,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.64) internal successors, (198), 74 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:30,687 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 924 transitions. [2021-06-12 21:01:30,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-06-12 21:01:30,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:30,687 INFO L472 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:30,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:30,888 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:30,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:30,888 INFO L82 PathProgramCache]: Analyzing trace with hash 409873221, now seen corresponding path program 67 times [2021-06-12 21:01:30,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:30,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926947214] [2021-06-12 21:01:30,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:31,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:31,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926947214] [2021-06-12 21:01:31,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926947214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:31,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460814174] [2021-06-12 21:01:31,203 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 [2021-06-12 21:01:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:31,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 95 conjunts are in the unsatisfiable core [2021-06-12 21:01:31,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:31,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460814174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:31,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:31,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-12 21:01:31,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088383883] [2021-06-12 21:01:31,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:01:31,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:31,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:01:31,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:01:31,426 INFO L87 Difference]: Start difference. First operand 444 states and 924 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:32,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:32,010 INFO L93 Difference]: Finished difference Result 1401 states and 2766 transitions. [2021-06-12 21:01:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:01:32,010 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-06-12 21:01:32,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:32,011 INFO L225 Difference]: With dead ends: 1401 [2021-06-12 21:01:32,012 INFO L226 Difference]: Without dead ends: 1248 [2021-06-12 21:01:32,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 269.9ms TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:01:32,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-12 21:01:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 945. [2021-06-12 21:01:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 2.1610169491525424) internal successors, (2040), 944 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2040 transitions. [2021-06-12 21:01:32,020 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2040 transitions. Word has length 106 [2021-06-12 21:01:32,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:32,020 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 2040 transitions. [2021-06-12 21:01:32,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:32,020 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2040 transitions. [2021-06-12 21:01:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-06-12 21:01:32,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:32,021 INFO L472 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:32,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 21:01:32,222 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:32,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:32,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1087227581, now seen corresponding path program 68 times [2021-06-12 21:01:32,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:32,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907112108] [2021-06-12 21:01:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:33,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:33,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907112108] [2021-06-12 21:01:33,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907112108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:33,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275457809] [2021-06-12 21:01:33,115 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 [2021-06-12 21:01:33,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:01:33,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:33,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 21:01:33,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:34,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275457809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:34,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:34,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 101 [2021-06-12 21:01:34,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815390603] [2021-06-12 21:01:34,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-06-12 21:01:34,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:34,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-06-12 21:01:34,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1727, Invalid=8575, Unknown=0, NotChecked=0, Total=10302 [2021-06-12 21:01:34,987 INFO L87 Difference]: Start difference. First operand 945 states and 2040 transitions. Second operand has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:16,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:16,446 INFO L93 Difference]: Finished difference Result 10381 states and 20557 transitions. [2021-06-12 21:02:16,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 676 states. [2021-06-12 21:02:16,446 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-06-12 21:02:16,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:16,453 INFO L225 Difference]: With dead ends: 10381 [2021-06-12 21:02:16,453 INFO L226 Difference]: Without dead ends: 8335 [2021-06-12 21:02:16,474 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 772 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303391 ImplicationChecksByTransitivity, 32409.6ms TimeCoverageRelationStatistics Valid=170817, Invalid=427485, Unknown=0, NotChecked=0, Total=598302 [2021-06-12 21:02:16,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2021-06-12 21:02:16,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 554. [2021-06-12 21:02:16,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.0705244122965643) internal successors, (1145), 553 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:16,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1145 transitions. [2021-06-12 21:02:16,505 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1145 transitions. Word has length 108 [2021-06-12 21:02:16,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:16,505 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1145 transitions. [2021-06-12 21:02:16,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:16,505 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1145 transitions. [2021-06-12 21:02:16,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-06-12 21:02:16,506 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:16,506 INFO L472 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:16,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:16,707 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:16,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:16,707 INFO L82 PathProgramCache]: Analyzing trace with hash 447708557, now seen corresponding path program 69 times [2021-06-12 21:02:16,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:16,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842215961] [2021-06-12 21:02:16,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:17,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:17,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842215961] [2021-06-12 21:02:17,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842215961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:17,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817561087] [2021-06-12 21:02:17,074 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 [2021-06-12 21:02:17,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-06-12 21:02:17,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:17,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 21:02:17,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:18,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817561087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:18,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:18,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51] total 77 [2021-06-12 21:02:18,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457803441] [2021-06-12 21:02:18,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-06-12 21:02:18,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:18,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-06-12 21:02:18,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=4879, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 21:02:18,835 INFO L87 Difference]: Start difference. First operand 554 states and 1145 transitions. Second operand has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:47,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:47,884 INFO L93 Difference]: Finished difference Result 7211 states and 14397 transitions. [2021-06-12 21:02:47,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 677 states. [2021-06-12 21:02:47,885 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-06-12 21:02:47,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:47,891 INFO L225 Difference]: With dead ends: 7211 [2021-06-12 21:02:47,891 INFO L226 Difference]: Without dead ends: 7207 [2021-06-12 21:02:47,909 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293222 ImplicationChecksByTransitivity, 26321.7ms TimeCoverageRelationStatistics Valid=133727, Invalid=429523, Unknown=0, NotChecked=0, Total=563250 [2021-06-12 21:02:47,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7207 states. [2021-06-12 21:02:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7207 to 462. [2021-06-12 21:02:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0867678958785247) internal successors, (962), 461 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 962 transitions. [2021-06-12 21:02:47,933 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 962 transitions. Word has length 108 [2021-06-12 21:02:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:47,934 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 962 transitions. [2021-06-12 21:02:47,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 962 transitions. [2021-06-12 21:02:47,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-12 21:02:47,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:47,934 INFO L472 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:48,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-12 21:02:48,149 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:48,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:48,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2071368959, now seen corresponding path program 70 times [2021-06-12 21:02:48,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:48,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437295091] [2021-06-12 21:02:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:48,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:48,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437295091] [2021-06-12 21:02:48,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437295091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:48,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245411614] [2021-06-12 21:02:48,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:02:48,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:02:48,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:48,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 99 conjunts are in the unsatisfiable core [2021-06-12 21:02:48,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:48,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245411614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:48,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:48,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-06-12 21:02:48,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878863700] [2021-06-12 21:02:48,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:02:48,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:48,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:02:48,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:02:48,699 INFO L87 Difference]: Start difference. First operand 462 states and 962 transitions. Second operand has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:49,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:49,359 INFO L93 Difference]: Finished difference Result 1460 states and 2883 transitions. [2021-06-12 21:02:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:02:49,359 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-12 21:02:49,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:49,360 INFO L225 Difference]: With dead ends: 1460 [2021-06-12 21:02:49,360 INFO L226 Difference]: Without dead ends: 1301 [2021-06-12 21:02:49,360 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 305.1ms TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:02:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-12 21:02:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 985. [2021-06-12 21:02:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 2.1615853658536586) internal successors, (2127), 984 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:49,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 2127 transitions. [2021-06-12 21:02:49,368 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 2127 transitions. Word has length 110 [2021-06-12 21:02:49,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:49,368 INFO L482 AbstractCegarLoop]: Abstraction has 985 states and 2127 transitions. [2021-06-12 21:02:49,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:49,368 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 2127 transitions. [2021-06-12 21:02:49,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-06-12 21:02:49,369 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:49,369 INFO L472 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:49,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:49,570 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:49,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:49,570 INFO L82 PathProgramCache]: Analyzing trace with hash -293975553, now seen corresponding path program 71 times [2021-06-12 21:02:49,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:49,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241242168] [2021-06-12 21:02:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:50,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:50,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241242168] [2021-06-12 21:02:50,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241242168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:50,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523789567] [2021-06-12 21:02:50,516 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 [2021-06-12 21:02:50,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-06-12 21:02:50,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:50,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 21:02:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:52,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523789567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:52,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:52,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 105 [2021-06-12 21:02:52,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241714086] [2021-06-12 21:02:52,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-06-12 21:02:52,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:52,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-06-12 21:02:52,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1861, Invalid=9269, Unknown=0, NotChecked=0, Total=11130 [2021-06-12 21:02:52,544 INFO L87 Difference]: Start difference. First operand 985 states and 2127 transitions. Second operand has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:39,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:39,367 INFO L93 Difference]: Finished difference Result 11166 states and 22119 transitions. [2021-06-12 21:03:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 729 states. [2021-06-12 21:03:39,367 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-06-12 21:03:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:39,376 INFO L225 Difference]: With dead ends: 11166 [2021-06-12 21:03:39,376 INFO L226 Difference]: Without dead ends: 8958 [2021-06-12 21:03:39,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354186 ImplicationChecksByTransitivity, 35897.7ms TimeCoverageRelationStatistics Valid=197709, Invalid=492021, Unknown=0, NotChecked=0, Total=689730 [2021-06-12 21:03:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8958 states. [2021-06-12 21:03:39,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8958 to 576. [2021-06-12 21:03:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.071304347826087) internal successors, (1191), 575 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1191 transitions. [2021-06-12 21:03:39,436 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1191 transitions. Word has length 112 [2021-06-12 21:03:39,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:39,437 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1191 transitions. [2021-06-12 21:03:39,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1191 transitions. [2021-06-12 21:03:39,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-06-12 21:03:39,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:39,438 INFO L472 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:39,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:39,638 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1604407155, now seen corresponding path program 72 times [2021-06-12 21:03:39,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:39,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847693944] [2021-06-12 21:03:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:40,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:40,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847693944] [2021-06-12 21:03:40,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847693944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:40,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829935765] [2021-06-12 21:03:40,088 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 [2021-06-12 21:03:40,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-06-12 21:03:40,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:40,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 21:03:40,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:41,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829935765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:41,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:41,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 53] total 80 [2021-06-12 21:03:41,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925245880] [2021-06-12 21:03:41,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-06-12 21:03:41,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:41,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-06-12 21:03:41,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=5269, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 21:03:41,881 INFO L87 Difference]: Start difference. First operand 576 states and 1191 transitions. Second operand has 81 states, 81 states have (on average 2.6419753086419755) internal successors, (214), 80 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:14,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:14,254 INFO L93 Difference]: Finished difference Result 7785 states and 15545 transitions. [2021-06-12 21:04:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 730 states. [2021-06-12 21:04:14,255 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.6419753086419755) internal successors, (214), 80 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-06-12 21:04:14,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:14,260 INFO L225 Difference]: With dead ends: 7785 [2021-06-12 21:04:14,260 INFO L226 Difference]: Without dead ends: 7781 [2021-06-12 21:04:14,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 805 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341817 ImplicationChecksByTransitivity, 29372.6ms TimeCoverageRelationStatistics Valid=154598, Invalid=495844, Unknown=0, NotChecked=0, Total=650442 [2021-06-12 21:04:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7781 states. [2021-06-12 21:04:14,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7781 to 480. [2021-06-12 21:04:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.0876826722338206) internal successors, (1000), 479 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1000 transitions. [2021-06-12 21:04:14,355 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1000 transitions. Word has length 112 [2021-06-12 21:04:14,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:14,356 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1000 transitions. [2021-06-12 21:04:14,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.6419753086419755) internal successors, (214), 80 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1000 transitions. [2021-06-12 21:04:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-06-12 21:04:14,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:14,356 INFO L472 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:14,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:14,557 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:14,557 INFO L82 PathProgramCache]: Analyzing trace with hash 34618557, now seen corresponding path program 73 times [2021-06-12 21:04:14,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:14,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766334463] [2021-06-12 21:04:14,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:14,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:14,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766334463] [2021-06-12 21:04:14,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766334463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:14,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016774107] [2021-06-12 21:04:14,902 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 [2021-06-12 21:04:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:14,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 103 conjunts are in the unsatisfiable core [2021-06-12 21:04:14,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:15,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016774107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:15,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:15,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-06-12 21:04:15,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620710514] [2021-06-12 21:04:15,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:04:15,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:15,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:04:15,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:04:15,083 INFO L87 Difference]: Start difference. First operand 480 states and 1000 transitions. Second operand has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 28 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:15,783 INFO L93 Difference]: Finished difference Result 1519 states and 3000 transitions. [2021-06-12 21:04:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:04:15,784 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 28 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-06-12 21:04:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:15,785 INFO L225 Difference]: With dead ends: 1519 [2021-06-12 21:04:15,785 INFO L226 Difference]: Without dead ends: 1354 [2021-06-12 21:04:15,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 301.0ms TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:04:15,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-12 21:04:15,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1025. [2021-06-12 21:04:15,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 2.162109375) internal successors, (2214), 1024 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:15,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 2214 transitions. [2021-06-12 21:04:15,794 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 2214 transitions. Word has length 114 [2021-06-12 21:04:15,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:15,794 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 2214 transitions. [2021-06-12 21:04:15,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 28 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:15,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 2214 transitions. [2021-06-12 21:04:15,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-06-12 21:04:15,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:15,795 INFO L472 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:15,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-12 21:04:15,995 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:15,996 INFO L82 PathProgramCache]: Analyzing trace with hash 979201211, now seen corresponding path program 74 times [2021-06-12 21:04:15,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:15,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505516385] [2021-06-12 21:04:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:16,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:16,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505516385] [2021-06-12 21:04:16,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505516385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:16,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117968565] [2021-06-12 21:04:16,971 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 [2021-06-12 21:04:17,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:04:17,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:04:17,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 21:04:17,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:19,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117968565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:19,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:19,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 109 [2021-06-12 21:04:19,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955405189] [2021-06-12 21:04:19,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-06-12 21:04:19,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:19,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-06-12 21:04:19,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2000, Invalid=9990, Unknown=0, NotChecked=0, Total=11990 [2021-06-12 21:04:19,137 INFO L87 Difference]: Start difference. First operand 1025 states and 2214 transitions. Second operand has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:12,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:05:12,733 INFO L93 Difference]: Finished difference Result 11979 states and 23737 transitions. [2021-06-12 21:05:12,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 784 states. [2021-06-12 21:05:12,734 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-06-12 21:05:12,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:05:12,742 INFO L225 Difference]: With dead ends: 11979 [2021-06-12 21:05:12,742 INFO L226 Difference]: Without dead ends: 9603 [2021-06-12 21:05:12,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 888 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411127 ImplicationChecksByTransitivity, 40358.0ms TimeCoverageRelationStatistics Valid=227665, Invalid=563545, Unknown=0, NotChecked=0, Total=791210 [2021-06-12 21:05:12,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9603 states. [2021-06-12 21:05:12,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9603 to 598. [2021-06-12 21:05:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 2.0720268006700167) internal successors, (1237), 597 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1237 transitions. [2021-06-12 21:05:12,806 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1237 transitions. Word has length 116 [2021-06-12 21:05:12,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:05:12,806 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1237 transitions. [2021-06-12 21:05:12,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:12,806 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1237 transitions. [2021-06-12 21:05:12,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-06-12 21:05:12,807 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:05:12,807 INFO L472 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:05:13,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:05:13,008 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:05:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:05:13,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1164539021, now seen corresponding path program 75 times [2021-06-12 21:05:13,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:05:13,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991082245] [2021-06-12 21:05:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:05:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 651 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:13,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:05:13,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991082245] [2021-06-12 21:05:13,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991082245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:13,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047673560] [2021-06-12 21:05:13,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:05:13,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2021-06-12 21:05:13,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:05:13,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 21:05:13,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:05:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 651 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:15,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047673560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:15,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:05:15,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 55] total 83 [2021-06-12 21:05:15,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198342009] [2021-06-12 21:05:15,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-06-12 21:05:15,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:05:15,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-06-12 21:05:15,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1298, Invalid=5674, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 21:05:15,609 INFO L87 Difference]: Start difference. First operand 598 states and 1237 transitions. Second operand has 84 states, 84 states have (on average 2.642857142857143) internal successors, (222), 83 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:52,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:05:52,573 INFO L93 Difference]: Finished difference Result 8381 states and 16737 transitions. [2021-06-12 21:05:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 785 states. [2021-06-12 21:05:52,574 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.642857142857143) internal successors, (222), 83 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-06-12 21:05:52,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:05:52,579 INFO L225 Difference]: With dead ends: 8381 [2021-06-12 21:05:52,580 INFO L226 Difference]: Without dead ends: 8377 [2021-06-12 21:05:52,604 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 863 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396220 ImplicationChecksByTransitivity, 33972.2ms TimeCoverageRelationStatistics Valid=177824, Invalid=569536, Unknown=0, NotChecked=0, Total=747360 [2021-06-12 21:05:52,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8377 states. [2021-06-12 21:05:52,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8377 to 498. [2021-06-12 21:05:52,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.0885311871227366) internal successors, (1038), 497 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1038 transitions. [2021-06-12 21:05:52,629 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1038 transitions. Word has length 116 [2021-06-12 21:05:52,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:05:52,629 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1038 transitions. [2021-06-12 21:05:52,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 2.642857142857143) internal successors, (222), 83 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1038 transitions. [2021-06-12 21:05:52,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-06-12 21:05:52,630 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:05:52,630 INFO L472 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:05:52,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:05:52,831 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:05:52,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:05:52,831 INFO L82 PathProgramCache]: Analyzing trace with hash -508190599, now seen corresponding path program 76 times [2021-06-12 21:05:52,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:05:52,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175124290] [2021-06-12 21:05:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:05:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:53,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:05:53,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175124290] [2021-06-12 21:05:53,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175124290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:53,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174087010] [2021-06-12 21:05:53,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:05:53,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:05:53,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:05:53,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 107 conjunts are in the unsatisfiable core [2021-06-12 21:05:53,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:05:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:53,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174087010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:53,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:05:53,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-12 21:05:53,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031764982] [2021-06-12 21:05:53,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:05:53,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:05:53,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:05:53,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:05:53,383 INFO L87 Difference]: Start difference. First operand 498 states and 1038 transitions. Second operand has 29 states, 29 states have (on average 4.068965517241379) internal successors, (118), 29 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:54,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:05:54,097 INFO L93 Difference]: Finished difference Result 1578 states and 3117 transitions. [2021-06-12 21:05:54,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:05:54,097 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.068965517241379) internal successors, (118), 29 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-06-12 21:05:54,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:05:54,099 INFO L225 Difference]: With dead ends: 1578 [2021-06-12 21:05:54,099 INFO L226 Difference]: Without dead ends: 1407 [2021-06-12 21:05:54,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:05:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-06-12 21:05:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1065. [2021-06-12 21:05:54,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 2.162593984962406) internal successors, (2301), 1064 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 2301 transitions. [2021-06-12 21:05:54,107 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 2301 transitions. Word has length 118 [2021-06-12 21:05:54,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:05:54,107 INFO L482 AbstractCegarLoop]: Abstraction has 1065 states and 2301 transitions. [2021-06-12 21:05:54,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.068965517241379) internal successors, (118), 29 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 2301 transitions. [2021-06-12 21:05:54,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-12 21:05:54,108 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:05:54,108 INFO L472 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:05:54,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-12 21:05:54,309 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:05:54,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:05:54,309 INFO L82 PathProgramCache]: Analyzing trace with hash -808541833, now seen corresponding path program 77 times [2021-06-12 21:05:54,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:05:54,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590606037] [2021-06-12 21:05:54,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:05:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:55,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:05:55,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590606037] [2021-06-12 21:05:55,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590606037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:55,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281544375] [2021-06-12 21:05:55,413 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 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 [2021-06-12 21:05:55,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-06-12 21:05:55,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:05:55,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 21:05:55,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:05:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:57,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281544375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:57,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:05:57,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 113 [2021-06-12 21:05:57,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169463334] [2021-06-12 21:05:57,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-06-12 21:05:57,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:05:57,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-06-12 21:05:57,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2144, Invalid=10738, Unknown=0, NotChecked=0, Total=12882 [2021-06-12 21:05:57,782 INFO L87 Difference]: Start difference. First operand 1065 states and 2301 transitions. Second operand has 114 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 113 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-12 21:06:07,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2021-06-12 21:06:08,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 21:06:08,155 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 21:06:08,180 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 21:06:08,182 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 21:06:08,182 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 09:06:08 BasicIcfg [2021-06-12 21:06:08,182 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 21:06:08,182 INFO L168 Benchmark]: Toolchain (without parser) took 770979.41 ms. Allocated memory was 179.3 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 160.6 MB in the beginning and 365.6 MB in the end (delta: -204.9 MB). Peak memory consumption was 965.9 MB. Max. memory is 8.0 GB. [2021-06-12 21:06:08,182 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 179.3 MB. Free memory is still 161.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:06:08,182 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.60 ms. Allocated memory is still 179.3 MB. Free memory was 160.6 MB in the beginning and 159.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:06:08,182 INFO L168 Benchmark]: Boogie Preprocessor took 10.89 ms. Allocated memory is still 179.3 MB. Free memory was 159.2 MB in the beginning and 158.2 MB in the end (delta: 959.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:06:08,182 INFO L168 Benchmark]: RCFGBuilder took 228.64 ms. Allocated memory is still 179.3 MB. Free memory was 158.2 MB in the beginning and 146.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-12 21:06:08,183 INFO L168 Benchmark]: TraceAbstraction took 770719.87 ms. Allocated memory was 179.3 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 146.2 MB in the beginning and 365.6 MB in the end (delta: -219.4 MB). Peak memory consumption was 951.2 MB. Max. memory is 8.0 GB. [2021-06-12 21:06:08,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 179.3 MB. Free memory is still 161.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 16.60 ms. Allocated memory is still 179.3 MB. Free memory was 160.6 MB in the beginning and 159.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.89 ms. Allocated memory is still 179.3 MB. Free memory was 159.2 MB in the beginning and 158.2 MB in the end (delta: 959.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 228.64 ms. Allocated memory is still 179.3 MB. Free memory was 158.2 MB in the beginning and 146.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 770719.87 ms. Allocated memory was 179.3 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 146.2 MB in the beginning and 365.6 MB in the end (delta: -219.4 MB). Peak memory consumption was 951.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1065states) and FLOYD_HOARE automaton (currently 216 states, 114 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 326 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 770585.5ms, OverallIterations: 80, TraceHistogramMax: 27, EmptinessCheckTime: 53.8ms, AutomataDifference: 680719.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7307 SDtfs, 52050 SDslu, 141939 SDs, 0 SdLazy, 146875 SolverSat, 6598 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63656.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23099 GetRequests, 4449 SyntacticMatches, 52 SemanticMatches, 18597 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4884775 ImplicationChecksByTransitivity, 585730.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1065occurred in iteration=79, InterpolantAutomatonStates: 15872, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 889.1ms AutomataMinimizationTime, 79 MinimizatonAttempts, 167663 StatesRemovedByMinimization, 79 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 439.1ms SsaConstructionTime, 1976.1ms SatisfiabilityAnalysisTime, 68124.7ms InterpolantComputationTime, 10638 NumberOfCodeBlocks, 10638 NumberOfCodeBlocksAsserted, 765 NumberOfCheckSat, 10480 ConstructedInterpolants, 0 QuantifiedInterpolants, 76563 SizeOfPredicates, 234 NumberOfNonLiveVariables, 13741 ConjunctsInSsa, 3094 ConjunctsInUnsatCore, 158 InterpolantComputations, 2 PerfectInterpolantSequences, 24153/74517 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown