/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:38:49,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:38:49,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:38:49,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 16:38:49,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:38:49,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:38:49,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:38:49,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:38:49,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:38:49,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:38:49,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:38:49,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:38:49,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:38:49,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:38:49,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:38:49,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:38:49,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:38:49,288 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:38:49,332 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:38:49,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:38:49,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:38:49,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:38:49,334 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:38:49,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:38:49,334 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:38:49,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:38:49,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:38:49,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:38:49,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:38:49,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:38:49,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:38:49,336 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:38:49,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:38:49,336 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:38:49,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:38:49,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:38:49,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:38:49,337 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:38:49,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:38:49,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:38:49,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:38:49,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:38:49,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:38:49,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:38:49,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:38:49,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:38:49,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:38:49,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:38:49,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:38:49,670 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:38:49,677 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:38:49,679 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:38:49,679 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:38:49,680 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-08-22 16:38:49,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2db3a8d44/106be01c69c442928e55915662c23df4/FLAG14db6d4e7 [2020-08-22 16:38:50,241 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:38:50,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c [2020-08-22 16:38:50,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2db3a8d44/106be01c69c442928e55915662c23df4/FLAG14db6d4e7 [2020-08-22 16:38:50,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2db3a8d44/106be01c69c442928e55915662c23df4 [2020-08-22 16:38:50,687 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:38:50,689 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:38:50,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:38:50,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:38:50,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:38:50,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:38:50" (1/1) ... [2020-08-22 16:38:50,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@112c1758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:50, skipping insertion in model container [2020-08-22 16:38:50,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:38:50" (1/1) ... [2020-08-22 16:38:50,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:38:50,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:38:50,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:38:50,959 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:38:50,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:38:51,016 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:38:51,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:51 WrapperNode [2020-08-22 16:38:51,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:38:51,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:38:51,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:38:51,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:38:51,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:51" (1/1) ... [2020-08-22 16:38:51,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:51" (1/1) ... [2020-08-22 16:38:51,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:51" (1/1) ... [2020-08-22 16:38:51,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:51" (1/1) ... [2020-08-22 16:38:51,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:51" (1/1) ... [2020-08-22 16:38:51,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:51" (1/1) ... [2020-08-22 16:38:51,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:51" (1/1) ... [2020-08-22 16:38:51,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:38:51,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:38:51,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:38:51,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:38:51,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:38:51,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:38:51,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:38:51,293 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:38:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:38:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:38:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:38:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:38:51,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:38:51,538 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:38:51,538 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 16:38:51,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:38:51 BoogieIcfgContainer [2020-08-22 16:38:51,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:38:51,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:38:51,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:38:51,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:38:51,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:38:50" (1/3) ... [2020-08-22 16:38:51,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e135f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:38:51, skipping insertion in model container [2020-08-22 16:38:51,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:51" (2/3) ... [2020-08-22 16:38:51,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e135f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:38:51, skipping insertion in model container [2020-08-22 16:38:51,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:38:51" (3/3) ... [2020-08-22 16:38:51,550 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-08-22 16:38:51,560 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:38:51,568 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:38:51,580 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:38:51,601 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:38:51,601 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:38:51,601 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:38:51,601 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:38:51,602 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:38:51,602 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:38:51,602 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:38:51,602 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:38:51,620 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-22 16:38:51,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 16:38:51,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:51,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:51,628 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-08-22 16:38:51,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:51,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170028721] [2020-08-22 16:38:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:51,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:51,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170028721] [2020-08-22 16:38:51,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:51,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:51,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868930482] [2020-08-22 16:38:51,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:51,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:51,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:51,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:51,833 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-08-22 16:38:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:51,973 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-08-22 16:38:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:51,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-22 16:38:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:51,988 INFO L225 Difference]: With dead ends: 57 [2020-08-22 16:38:51,989 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 16:38:51,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 16:38:52,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-08-22 16:38:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 16:38:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-08-22 16:38:52,043 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-08-22 16:38:52,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:52,043 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-08-22 16:38:52,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:52,044 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-08-22 16:38:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 16:38:52,044 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:52,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:52,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:38:52,045 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:52,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:52,046 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-08-22 16:38:52,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:52,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883944623] [2020-08-22 16:38:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:52,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883944623] [2020-08-22 16:38:52,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:52,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:52,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830755159] [2020-08-22 16:38:52,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:52,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:52,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:52,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,100 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-08-22 16:38:52,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:52,129 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-08-22 16:38:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:52,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-22 16:38:52,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:52,132 INFO L225 Difference]: With dead ends: 67 [2020-08-22 16:38:52,132 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 16:38:52,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 16:38:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-22 16:38:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 16:38:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-08-22 16:38:52,144 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-08-22 16:38:52,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:52,145 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-08-22 16:38:52,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:52,145 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-08-22 16:38:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 16:38:52,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:52,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:52,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:38:52,147 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:52,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:52,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-08-22 16:38:52,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:52,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450760055] [2020-08-22 16:38:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:52,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450760055] [2020-08-22 16:38:52,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:52,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:52,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461295846] [2020-08-22 16:38:52,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:52,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:52,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:52,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,199 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-08-22 16:38:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:52,222 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-08-22 16:38:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:52,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 16:38:52,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:52,225 INFO L225 Difference]: With dead ends: 63 [2020-08-22 16:38:52,225 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 16:38:52,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 16:38:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-08-22 16:38:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 16:38:52,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-08-22 16:38:52,234 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-08-22 16:38:52,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:52,235 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-08-22 16:38:52,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:52,235 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-08-22 16:38:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 16:38:52,236 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:52,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:52,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 16:38:52,237 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:52,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-08-22 16:38:52,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:52,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313242711] [2020-08-22 16:38:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:52,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313242711] [2020-08-22 16:38:52,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:52,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:52,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704432218] [2020-08-22 16:38:52,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:52,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:52,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:52,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,283 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-08-22 16:38:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:52,305 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-08-22 16:38:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:52,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 16:38:52,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:52,307 INFO L225 Difference]: With dead ends: 76 [2020-08-22 16:38:52,307 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 16:38:52,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 16:38:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-08-22 16:38:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 16:38:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-08-22 16:38:52,319 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-08-22 16:38:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:52,320 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-08-22 16:38:52,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-08-22 16:38:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 16:38:52,322 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:52,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:52,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 16:38:52,322 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:52,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:52,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-08-22 16:38:52,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:52,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956774486] [2020-08-22 16:38:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:52,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956774486] [2020-08-22 16:38:52,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:52,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:52,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806060943] [2020-08-22 16:38:52,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:52,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:52,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:52,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,381 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-08-22 16:38:52,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:52,414 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-08-22 16:38:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:52,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 16:38:52,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:52,416 INFO L225 Difference]: With dead ends: 124 [2020-08-22 16:38:52,416 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 16:38:52,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 16:38:52,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-08-22 16:38:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 16:38:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-08-22 16:38:52,428 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-08-22 16:38:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:52,428 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-08-22 16:38:52,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-08-22 16:38:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 16:38:52,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:52,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:52,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 16:38:52,431 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:52,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:52,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-08-22 16:38:52,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:52,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645857972] [2020-08-22 16:38:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:52,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645857972] [2020-08-22 16:38:52,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:52,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:52,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18955392] [2020-08-22 16:38:52,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:52,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:52,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:52,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,469 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-08-22 16:38:52,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:52,503 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-08-22 16:38:52,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:52,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 16:38:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:52,505 INFO L225 Difference]: With dead ends: 111 [2020-08-22 16:38:52,505 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 16:38:52,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 16:38:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-22 16:38:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 16:38:52,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-08-22 16:38:52,522 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-08-22 16:38:52,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:52,522 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-08-22 16:38:52,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:52,523 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-08-22 16:38:52,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 16:38:52,527 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:52,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:52,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 16:38:52,528 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:52,528 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-08-22 16:38:52,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:52,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451089347] [2020-08-22 16:38:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:52,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451089347] [2020-08-22 16:38:52,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:52,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:52,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383304344] [2020-08-22 16:38:52,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:52,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:52,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:52,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,573 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-08-22 16:38:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:52,605 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-08-22 16:38:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:52,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 16:38:52,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:52,607 INFO L225 Difference]: With dead ends: 132 [2020-08-22 16:38:52,607 INFO L226 Difference]: Without dead ends: 130 [2020-08-22 16:38:52,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-22 16:38:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-08-22 16:38:52,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-22 16:38:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-08-22 16:38:52,622 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-08-22 16:38:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:52,622 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-08-22 16:38:52,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:52,622 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-08-22 16:38:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 16:38:52,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:52,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:52,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 16:38:52,625 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:52,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-08-22 16:38:52,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:52,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190419297] [2020-08-22 16:38:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:52,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190419297] [2020-08-22 16:38:52,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:52,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:52,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488903270] [2020-08-22 16:38:52,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:52,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:52,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:52,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,663 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-08-22 16:38:52,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:52,686 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-08-22 16:38:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:52,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 16:38:52,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:52,688 INFO L225 Difference]: With dead ends: 232 [2020-08-22 16:38:52,688 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 16:38:52,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 16:38:52,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-22 16:38:52,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-22 16:38:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-08-22 16:38:52,720 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-08-22 16:38:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:52,721 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-08-22 16:38:52,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:52,721 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-08-22 16:38:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 16:38:52,724 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:52,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:52,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 16:38:52,727 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:52,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:52,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-08-22 16:38:52,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:52,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827176068] [2020-08-22 16:38:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:52,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827176068] [2020-08-22 16:38:52,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:52,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:52,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502155540] [2020-08-22 16:38:52,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:52,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:52,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:52,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,806 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-08-22 16:38:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:52,836 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-08-22 16:38:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:52,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 16:38:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:52,838 INFO L225 Difference]: With dead ends: 204 [2020-08-22 16:38:52,838 INFO L226 Difference]: Without dead ends: 142 [2020-08-22 16:38:52,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-22 16:38:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-08-22 16:38:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 16:38:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-08-22 16:38:52,858 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-08-22 16:38:52,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:52,858 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-08-22 16:38:52,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-08-22 16:38:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 16:38:52,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:52,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:52,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 16:38:52,867 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:52,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:52,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-08-22 16:38:52,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:52,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100253413] [2020-08-22 16:38:52,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:52,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100253413] [2020-08-22 16:38:52,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:52,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:52,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495853170] [2020-08-22 16:38:52,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:52,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:52,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:52,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,928 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-08-22 16:38:52,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:52,963 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-08-22 16:38:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:52,964 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 16:38:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:52,966 INFO L225 Difference]: With dead ends: 236 [2020-08-22 16:38:52,967 INFO L226 Difference]: Without dead ends: 234 [2020-08-22 16:38:52,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-22 16:38:52,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-08-22 16:38:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-22 16:38:52,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-08-22 16:38:52,992 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-08-22 16:38:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:52,995 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-08-22 16:38:52,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-08-22 16:38:52,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 16:38:52,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:52,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:52,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 16:38:52,997 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:52,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:53,002 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-08-22 16:38:53,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:53,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451539113] [2020-08-22 16:38:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:53,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:53,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451539113] [2020-08-22 16:38:53,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:53,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:53,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455116125] [2020-08-22 16:38:53,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:53,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:53,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:53,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:53,038 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-08-22 16:38:53,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:53,060 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-08-22 16:38:53,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:53,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 16:38:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:53,062 INFO L225 Difference]: With dead ends: 444 [2020-08-22 16:38:53,062 INFO L226 Difference]: Without dead ends: 258 [2020-08-22 16:38:53,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:53,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-22 16:38:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-22 16:38:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 16:38:53,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-08-22 16:38:53,078 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-08-22 16:38:53,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:53,078 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-08-22 16:38:53,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:53,079 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-08-22 16:38:53,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:38:53,080 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:53,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:53,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 16:38:53,080 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:53,081 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-08-22 16:38:53,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:53,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646922410] [2020-08-22 16:38:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:53,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:53,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646922410] [2020-08-22 16:38:53,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:53,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:53,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874848050] [2020-08-22 16:38:53,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:53,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:53,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:53,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:53,104 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-08-22 16:38:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:53,124 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-08-22 16:38:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:53,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 16:38:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:53,127 INFO L225 Difference]: With dead ends: 384 [2020-08-22 16:38:53,127 INFO L226 Difference]: Without dead ends: 266 [2020-08-22 16:38:53,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-22 16:38:53,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-08-22 16:38:53,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-22 16:38:53,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-08-22 16:38:53,140 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-08-22 16:38:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:53,141 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-08-22 16:38:53,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:53,141 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-08-22 16:38:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:38:53,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:53,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:53,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 16:38:53,142 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:53,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:53,143 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-08-22 16:38:53,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:53,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966785289] [2020-08-22 16:38:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:53,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:53,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966785289] [2020-08-22 16:38:53,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:53,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:53,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134459034] [2020-08-22 16:38:53,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:53,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:53,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:53,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:53,167 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-08-22 16:38:53,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:53,189 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-08-22 16:38:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:53,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 16:38:53,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:53,193 INFO L225 Difference]: With dead ends: 426 [2020-08-22 16:38:53,193 INFO L226 Difference]: Without dead ends: 424 [2020-08-22 16:38:53,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:53,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-08-22 16:38:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-08-22 16:38:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-22 16:38:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-08-22 16:38:53,208 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-08-22 16:38:53,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:53,209 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-08-22 16:38:53,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-08-22 16:38:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:38:53,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:38:53,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:38:53,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 16:38:53,211 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:38:53,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:38:53,211 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-08-22 16:38:53,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:38:53,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876004515] [2020-08-22 16:38:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:38:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:53,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:38:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:38:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:38:53,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876004515] [2020-08-22 16:38:53,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:38:53,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:38:53,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486938170] [2020-08-22 16:38:53,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:38:53,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:38:53,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:38:53,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:53,234 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-08-22 16:38:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:38:53,260 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-08-22 16:38:53,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:38:53,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 16:38:53,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:38:53,261 INFO L225 Difference]: With dead ends: 856 [2020-08-22 16:38:53,261 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:38:53,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:38:53,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:38:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:38:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:38:53,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:38:53,264 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-22 16:38:53,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:38:53,265 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:38:53,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:38:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:38:53,265 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:38:53,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 16:38:53,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:38:53,300 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 16:38:53,301 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:38:53,301 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:38:53,301 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:38:53,301 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:38:53,301 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:38:53,301 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-08-22 16:38:53,302 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-08-22 16:38:53,302 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-08-22 16:38:53,302 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-08-22 16:38:53,302 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-08-22 16:38:53,302 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-08-22 16:38:53,302 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-08-22 16:38:53,302 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-08-22 16:38:53,302 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-08-22 16:38:53,303 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-08-22 16:38:53,303 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-08-22 16:38:53,303 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-22 16:38:53,303 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-08-22 16:38:53,303 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-08-22 16:38:53,303 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-08-22 16:38:53,303 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-08-22 16:38:53,303 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-08-22 16:38:53,304 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-08-22 16:38:53,305 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-08-22 16:38:53,305 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-22 16:38:53,305 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-08-22 16:38:53,305 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-08-22 16:38:53,305 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-08-22 16:38:53,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:38:53 BoogieIcfgContainer [2020-08-22 16:38:53,325 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:38:53,329 INFO L168 Benchmark]: Toolchain (without parser) took 2638.42 ms. Allocated memory was 140.0 MB in the beginning and 234.4 MB in the end (delta: 94.4 MB). Free memory was 103.2 MB in the beginning and 143.4 MB in the end (delta: -40.2 MB). Peak memory consumption was 54.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:38:53,330 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:38:53,332 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.12 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 92.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:38:53,335 INFO L168 Benchmark]: Boogie Preprocessor took 189.34 ms. Allocated memory was 140.0 MB in the beginning and 206.0 MB in the end (delta: 66.1 MB). Free memory was 92.9 MB in the beginning and 184.0 MB in the end (delta: -91.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:38:53,344 INFO L168 Benchmark]: RCFGBuilder took 333.96 ms. Allocated memory is still 206.0 MB. Free memory was 184.0 MB in the beginning and 169.3 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:38:53,345 INFO L168 Benchmark]: TraceAbstraction took 1781.46 ms. Allocated memory was 206.0 MB in the beginning and 234.4 MB in the end (delta: 28.3 MB). Free memory was 168.6 MB in the beginning and 143.4 MB in the end (delta: 25.2 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:38:53,349 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 328.12 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 92.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 189.34 ms. Allocated memory was 140.0 MB in the beginning and 206.0 MB in the end (delta: 66.1 MB). Free memory was 92.9 MB in the beginning and 184.0 MB in the end (delta: -91.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 333.96 ms. Allocated memory is still 206.0 MB. Free memory was 184.0 MB in the beginning and 169.3 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1781.46 ms. Allocated memory was 206.0 MB in the beginning and 234.4 MB in the end (delta: 28.3 MB). Free memory was 168.6 MB in the beginning and 143.4 MB in the end (delta: 25.2 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...