/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/parallel/ticket-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:52:47,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:52:47,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:52:47,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:52:47,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:52:47,550 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:52:47,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:52:47,550 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:52:47,550 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:52:47,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:52:47,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:52:47,552 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:52:47,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:52:47,553 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:52:47,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:52:47,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:52:47,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:52:47,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:52:47,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:52:47,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:52:47,554 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:52:47,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:52:47,554 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:52:47,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:52:47,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:52:47,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:52:47,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:52:47,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:52:47,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:52:47,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:52:47,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:52:47,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:52:47,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:52:47,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:52:47,562 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:52:47,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:52:47,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:52:47,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:52:47,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:52:47,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:52:47,830 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:52:47,832 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:52:47,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl [2021-07-09 17:52:47,833 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl' [2021-07-09 17:52:47,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:52:47,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:52:47,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:52:47,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:52:47,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:52:47,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:47" (1/1) ... [2021-07-09 17:52:47,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:47" (1/1) ... [2021-07-09 17:52:47,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:52:47,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:52:47,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:52:47,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:52:47,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:47" (1/1) ... [2021-07-09 17:52:47,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:47" (1/1) ... [2021-07-09 17:52:47,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:47" (1/1) ... [2021-07-09 17:52:47,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:47" (1/1) ... [2021-07-09 17:52:47,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:47" (1/1) ... [2021-07-09 17:52:47,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:47" (1/1) ... [2021-07-09 17:52:47,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:47" (1/1) ... [2021-07-09 17:52:47,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:52:47,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:52:47,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:52:47,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:52:47,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:52:47,963 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:52:47,964 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:52:47,964 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:52:47,964 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:52:47,964 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:52:47,964 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:52:47,964 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:52:47,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:52:47,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:52:47,964 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:52:47,965 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:52:47,965 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:52:47,965 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:52:48,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:52:48,095 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:52:48,096 INFO L202 PluginConnector]: Adding new model ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:52:48 BoogieIcfgContainer [2021-07-09 17:52:48,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:52:48,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:52:48,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:52:48,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:52:48,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:52:47" (1/2) ... [2021-07-09 17:52:48,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e8dba19 and model type ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:52:48, skipping insertion in model container [2021-07-09 17:52:48,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:52:48" (2/2) ... [2021-07-09 17:52:48,101 INFO L111 eAbstractionObserver]: Analyzing ICFG ticket-3.wvr.bpl [2021-07-09 17:52:48,104 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:52:48,104 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:52:48,104 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:52:48,105 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:52:48,141 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 17:52:48,155 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 17:52:48,172 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:52:48,172 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:52:48,172 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:52:48,172 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:52:48,172 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:52:48,172 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:52:48,172 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:52:48,172 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:52:48,179 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 30 transitions, 84 flow [2021-07-09 17:52:48,216 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 348 states, 347 states have (on average 2.5187319884726227) internal successors, (874), 347 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:48,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 347 states have (on average 2.5187319884726227) internal successors, (874), 347 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:52:48,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:48,229 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:48,230 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:48,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1307786581, now seen corresponding path program 1 times [2021-07-09 17:52:48,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:48,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197414907] [2021-07-09 17:52:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:48,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:48,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197414907] [2021-07-09 17:52:48,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197414907] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:48,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:48,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:52:48,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374929103] [2021-07-09 17:52:48,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:52:48,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:48,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:52:48,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:52:48,458 INFO L87 Difference]: Start difference. First operand has 348 states, 347 states have (on average 2.5187319884726227) internal successors, (874), 347 states have internal predecessors, (874), 0 states have call successors, (0), 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 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:48,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:48,555 INFO L93 Difference]: Finished difference Result 667 states and 1586 transitions. [2021-07-09 17:52:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:52:48,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:52:48,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:48,571 INFO L225 Difference]: With dead ends: 667 [2021-07-09 17:52:48,571 INFO L226 Difference]: Without dead ends: 667 [2021-07-09 17:52:48,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:52:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-07-09 17:52:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 415. [2021-07-09 17:52:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.4589371980676327) internal successors, (1018), 414 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1018 transitions. [2021-07-09 17:52:48,626 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1018 transitions. Word has length 25 [2021-07-09 17:52:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:48,627 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1018 transitions. [2021-07-09 17:52:48,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:48,627 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1018 transitions. [2021-07-09 17:52:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:52:48,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:48,630 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:48,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:52:48,630 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash 528814763, now seen corresponding path program 2 times [2021-07-09 17:52:48,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:48,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413231738] [2021-07-09 17:52:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:48,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:48,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413231738] [2021-07-09 17:52:48,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413231738] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:48,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:48,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:52:48,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400724010] [2021-07-09 17:52:48,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:52:48,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:48,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:52:48,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:52:48,720 INFO L87 Difference]: Start difference. First operand 415 states and 1018 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:48,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:48,756 INFO L93 Difference]: Finished difference Result 571 states and 1381 transitions. [2021-07-09 17:52:48,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:52:48,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:52:48,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:48,758 INFO L225 Difference]: With dead ends: 571 [2021-07-09 17:52:48,758 INFO L226 Difference]: Without dead ends: 311 [2021-07-09 17:52:48,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:52:48,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-09 17:52:48,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2021-07-09 17:52:48,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.3) internal successors, (713), 310 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:48,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 713 transitions. [2021-07-09 17:52:48,771 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 713 transitions. Word has length 25 [2021-07-09 17:52:48,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:48,771 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 713 transitions. [2021-07-09 17:52:48,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 713 transitions. [2021-07-09 17:52:48,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:52:48,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:48,773 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:48,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:52:48,773 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:48,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:48,774 INFO L82 PathProgramCache]: Analyzing trace with hash -784430363, now seen corresponding path program 3 times [2021-07-09 17:52:48,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:48,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703735903] [2021-07-09 17:52:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:48,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:48,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703735903] [2021-07-09 17:52:48,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703735903] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:48,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:48,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:52:48,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317057831] [2021-07-09 17:52:48,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:52:48,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:48,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:52:48,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:52:48,851 INFO L87 Difference]: Start difference. First operand 311 states and 713 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:48,940 INFO L93 Difference]: Finished difference Result 353 states and 754 transitions. [2021-07-09 17:52:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:52:48,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:52:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:48,942 INFO L225 Difference]: With dead ends: 353 [2021-07-09 17:52:48,942 INFO L226 Difference]: Without dead ends: 333 [2021-07-09 17:52:48,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:52:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-07-09 17:52:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 243. [2021-07-09 17:52:48,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.169421487603306) internal successors, (525), 242 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 525 transitions. [2021-07-09 17:52:48,950 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 525 transitions. Word has length 25 [2021-07-09 17:52:48,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:48,950 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 525 transitions. [2021-07-09 17:52:48,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 525 transitions. [2021-07-09 17:52:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:52:48,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:48,951 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:48,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:52:48,951 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:48,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash -2100723483, now seen corresponding path program 4 times [2021-07-09 17:52:48,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:48,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988473503] [2021-07-09 17:52:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:48,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:48,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988473503] [2021-07-09 17:52:48,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988473503] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:48,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:48,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:52:48,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528812272] [2021-07-09 17:52:48,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:52:48,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:48,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:52:48,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:52:48,993 INFO L87 Difference]: Start difference. First operand 243 states and 525 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:49,066 INFO L93 Difference]: Finished difference Result 345 states and 726 transitions. [2021-07-09 17:52:49,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:52:49,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:52:49,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:49,069 INFO L225 Difference]: With dead ends: 345 [2021-07-09 17:52:49,069 INFO L226 Difference]: Without dead ends: 327 [2021-07-09 17:52:49,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:52:49,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-09 17:52:49,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 238. [2021-07-09 17:52:49,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.1181434599156117) internal successors, (502), 237 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 502 transitions. [2021-07-09 17:52:49,076 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 502 transitions. Word has length 25 [2021-07-09 17:52:49,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:49,076 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 502 transitions. [2021-07-09 17:52:49,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 502 transitions. [2021-07-09 17:52:49,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:52:49,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:49,077 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:49,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:52:49,077 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:49,078 INFO L82 PathProgramCache]: Analyzing trace with hash 835582243, now seen corresponding path program 5 times [2021-07-09 17:52:49,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:49,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994363588] [2021-07-09 17:52:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:49,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:49,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994363588] [2021-07-09 17:52:49,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994363588] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:49,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:49,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:52:49,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444220195] [2021-07-09 17:52:49,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:52:49,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:49,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:52:49,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:52:49,128 INFO L87 Difference]: Start difference. First operand 238 states and 502 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:49,220 INFO L93 Difference]: Finished difference Result 354 states and 725 transitions. [2021-07-09 17:52:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:52:49,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:52:49,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:49,222 INFO L225 Difference]: With dead ends: 354 [2021-07-09 17:52:49,222 INFO L226 Difference]: Without dead ends: 330 [2021-07-09 17:52:49,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:52:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-07-09 17:52:49,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 234. [2021-07-09 17:52:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.07725321888412) internal successors, (484), 233 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 484 transitions. [2021-07-09 17:52:49,228 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 484 transitions. Word has length 25 [2021-07-09 17:52:49,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:49,229 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 484 transitions. [2021-07-09 17:52:49,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,229 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 484 transitions. [2021-07-09 17:52:49,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:52:49,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:49,229 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:49,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:52:49,230 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:49,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1673351899, now seen corresponding path program 6 times [2021-07-09 17:52:49,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:49,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593386237] [2021-07-09 17:52:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:49,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:49,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593386237] [2021-07-09 17:52:49,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593386237] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:49,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:49,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:52:49,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366180537] [2021-07-09 17:52:49,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:52:49,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:49,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:52:49,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:52:49,291 INFO L87 Difference]: Start difference. First operand 234 states and 484 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:49,353 INFO L93 Difference]: Finished difference Result 322 states and 654 transitions. [2021-07-09 17:52:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:52:49,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:52:49,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:49,355 INFO L225 Difference]: With dead ends: 322 [2021-07-09 17:52:49,355 INFO L226 Difference]: Without dead ends: 306 [2021-07-09 17:52:49,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:52:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-07-09 17:52:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 226. [2021-07-09 17:52:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.057777777777778) internal successors, (463), 225 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 463 transitions. [2021-07-09 17:52:49,361 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 463 transitions. Word has length 25 [2021-07-09 17:52:49,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:49,364 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 463 transitions. [2021-07-09 17:52:49,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 463 transitions. [2021-07-09 17:52:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:52:49,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:49,370 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:49,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:52:49,370 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:49,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:49,370 INFO L82 PathProgramCache]: Analyzing trace with hash -949575633, now seen corresponding path program 7 times [2021-07-09 17:52:49,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:49,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976426950] [2021-07-09 17:52:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:49,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:49,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976426950] [2021-07-09 17:52:49,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976426950] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:49,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:49,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:52:49,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544506104] [2021-07-09 17:52:49,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:52:49,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:49,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:52:49,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:52:49,444 INFO L87 Difference]: Start difference. First operand 226 states and 463 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:49,530 INFO L93 Difference]: Finished difference Result 322 states and 647 transitions. [2021-07-09 17:52:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:52:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:52:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:49,532 INFO L225 Difference]: With dead ends: 322 [2021-07-09 17:52:49,532 INFO L226 Difference]: Without dead ends: 286 [2021-07-09 17:52:49,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:52:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-09 17:52:49,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 206. [2021-07-09 17:52:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.0585365853658537) internal successors, (422), 205 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 422 transitions. [2021-07-09 17:52:49,538 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 422 transitions. Word has length 25 [2021-07-09 17:52:49,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:49,539 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 422 transitions. [2021-07-09 17:52:49,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,540 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 422 transitions. [2021-07-09 17:52:49,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:52:49,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:49,540 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:49,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:52:49,541 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:49,541 INFO L82 PathProgramCache]: Analyzing trace with hash -682208179, now seen corresponding path program 8 times [2021-07-09 17:52:49,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:49,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927234400] [2021-07-09 17:52:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:49,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:49,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927234400] [2021-07-09 17:52:49,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927234400] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:49,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:49,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:52:49,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351009633] [2021-07-09 17:52:49,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:52:49,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:49,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:52:49,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:52:49,577 INFO L87 Difference]: Start difference. First operand 206 states and 422 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:49,616 INFO L93 Difference]: Finished difference Result 93 states and 166 transitions. [2021-07-09 17:52:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:52:49,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:52:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:49,618 INFO L225 Difference]: With dead ends: 93 [2021-07-09 17:52:49,618 INFO L226 Difference]: Without dead ends: 69 [2021-07-09 17:52:49,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:52:49,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-07-09 17:52:49,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-07-09 17:52:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.8088235294117647) internal successors, (123), 68 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 123 transitions. [2021-07-09 17:52:49,620 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 123 transitions. Word has length 25 [2021-07-09 17:52:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:49,620 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 123 transitions. [2021-07-09 17:52:49,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 123 transitions. [2021-07-09 17:52:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:52:49,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:49,621 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:49,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 17:52:49,621 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:49,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:49,621 INFO L82 PathProgramCache]: Analyzing trace with hash -554651247, now seen corresponding path program 9 times [2021-07-09 17:52:49,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:49,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353881894] [2021-07-09 17:52:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:49,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:49,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353881894] [2021-07-09 17:52:49,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353881894] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:49,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:49,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:52:49,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805469265] [2021-07-09 17:52:49,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:52:49,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:49,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:52:49,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:52:49,666 INFO L87 Difference]: Start difference. First operand 69 states and 123 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:49,705 INFO L93 Difference]: Finished difference Result 111 states and 204 transitions. [2021-07-09 17:52:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:52:49,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:52:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:49,706 INFO L225 Difference]: With dead ends: 111 [2021-07-09 17:52:49,706 INFO L226 Difference]: Without dead ends: 97 [2021-07-09 17:52:49,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:52:49,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-09 17:52:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2021-07-09 17:52:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.803030303030303) internal successors, (119), 66 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 119 transitions. [2021-07-09 17:52:49,708 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 119 transitions. Word has length 25 [2021-07-09 17:52:49,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:49,708 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 119 transitions. [2021-07-09 17:52:49,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,708 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 119 transitions. [2021-07-09 17:52:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:52:49,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:49,709 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:49,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 17:52:49,711 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:49,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:49,711 INFO L82 PathProgramCache]: Analyzing trace with hash 130113345, now seen corresponding path program 10 times [2021-07-09 17:52:49,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:49,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171563338] [2021-07-09 17:52:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:49,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:49,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171563338] [2021-07-09 17:52:49,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171563338] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:52:49,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:52:49,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 17:52:49,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180485650] [2021-07-09 17:52:49,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:52:49,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:49,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:52:49,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:52:49,766 INFO L87 Difference]: Start difference. First operand 67 states and 119 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:49,816 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2021-07-09 17:52:49,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:52:49,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:52:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:49,817 INFO L225 Difference]: With dead ends: 32 [2021-07-09 17:52:49,817 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 17:52:49,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:52:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 17:52:49,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 17:52:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 17:52:49,819 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-07-09 17:52:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:49,819 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 17:52:49,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,819 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 17:52:49,819 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 17:52:49,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-09 17:52:49,821 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:52:49,823 INFO L202 PluginConnector]: Adding new model ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:52:49 BasicIcfg [2021-07-09 17:52:49,823 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:52:49,824 INFO L168 Benchmark]: Toolchain (without parser) took 1954.11 ms. Allocated memory was 183.5 MB in the beginning and 232.8 MB in the end (delta: 49.3 MB). Free memory was 164.4 MB in the beginning and 145.0 MB in the end (delta: 19.4 MB). Peak memory consumption was 70.7 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:49,824 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 183.5 MB. Free memory is still 165.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:52:49,824 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.27 ms. Allocated memory is still 183.5 MB. Free memory was 164.4 MB in the beginning and 162.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:49,834 INFO L168 Benchmark]: Boogie Preprocessor took 8.95 ms. Allocated memory is still 183.5 MB. Free memory was 162.9 MB in the beginning and 162.0 MB in the end (delta: 854.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:49,834 INFO L168 Benchmark]: RCFGBuilder took 189.96 ms. Allocated memory is still 183.5 MB. Free memory was 162.0 MB in the beginning and 149.4 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:49,835 INFO L168 Benchmark]: TraceAbstraction took 1725.86 ms. Allocated memory was 183.5 MB in the beginning and 232.8 MB in the end (delta: 49.3 MB). Free memory was 149.0 MB in the beginning and 145.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 53.9 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:49,835 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 183.5 MB. Free memory is still 165.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.27 ms. Allocated memory is still 183.5 MB. Free memory was 164.4 MB in the beginning and 162.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 8.95 ms. Allocated memory is still 183.5 MB. Free memory was 162.9 MB in the beginning and 162.0 MB in the end (delta: 854.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 189.96 ms. Allocated memory is still 183.5 MB. Free memory was 162.0 MB in the beginning and 149.4 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1725.86 ms. Allocated memory was 183.5 MB in the beginning and 232.8 MB in the end (delta: 49.3 MB). Free memory was 149.0 MB in the beginning and 145.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 53.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 65]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 53 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1649.8ms, OverallIterations: 10, TraceHistogramMax: 1, EmptinessCheckTime: 24.8ms, AutomataDifference: 721.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 43.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 272 SDtfs, 294 SDslu, 737 SDs, 0 SdLazy, 688 SolverSat, 106 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 367.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 346.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=415occurred in iteration=1, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 89.9ms AutomataMinimizationTime, 10 MinimizatonAttempts, 717 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 21.6ms SsaConstructionTime, 103.5ms SatisfiabilityAnalysisTime, 523.1ms InterpolantComputationTime, 250 NumberOfCodeBlocks, 250 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 240 ConstructedInterpolants, 0 QuantifiedInterpolants, 638 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...