/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_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:38:57,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:38:57,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:38:57,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 16:38:57,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:38:57,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:38:57,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:38:57,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:38:57,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:38:57,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:38:57,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:38:57,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:38:57,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:38:57,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:38:57,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:38:57,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:38:57,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:38:57,718 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 16:38:57,743 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:38:57,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:38:57,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:38:57,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:38:57,745 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:38:57,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:38:57,745 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:38:57,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:38:57,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:38:57,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:38:57,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:38:57,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:38:57,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:38:57,747 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:38:57,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:38:57,747 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:38:57,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:38:57,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:38:57,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:38:57,748 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:38:57,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:38:57,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:38:57,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:38:57,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:38:57,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:38:57,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:38:57,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:38:57,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:38:57,750 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:38:57,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:38:58,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:38:58,094 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:38:58,098 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:38:58,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:38:58,100 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:38:58,101 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-22 16:38:58,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8968f0ca6/0e511de6eea54462bff79c320efd3078/FLAG6088f05ed [2020-08-22 16:38:58,698 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:38:58,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-22 16:38:58,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8968f0ca6/0e511de6eea54462bff79c320efd3078/FLAG6088f05ed [2020-08-22 16:38:59,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8968f0ca6/0e511de6eea54462bff79c320efd3078 [2020-08-22 16:38:59,082 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:38:59,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:38:59,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:38:59,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:38:59,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:38:59,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:38:59" (1/1) ... [2020-08-22 16:38:59,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@406521a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59, skipping insertion in model container [2020-08-22 16:38:59,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:38:59" (1/1) ... [2020-08-22 16:38:59,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:38:59,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:38:59,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:38:59,355 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:38:59,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:38:59,397 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:38:59,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59 WrapperNode [2020-08-22 16:38:59,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:38:59,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:38:59,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:38:59,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:38:59,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... [2020-08-22 16:38:59,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... [2020-08-22 16:38:59,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... [2020-08-22 16:38:59,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... [2020-08-22 16:38:59,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... [2020-08-22 16:38:59,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... [2020-08-22 16:38:59,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... [2020-08-22 16:38:59,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:38:59,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:38:59,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:38:59,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:38:59,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (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 16:38:59,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:38:59,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:38:59,604 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:38:59,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:38:59,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:38:59,604 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:38:59,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:38:59,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:38:59,899 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:38:59,900 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 16:38:59,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:38:59 BoogieIcfgContainer [2020-08-22 16:38:59,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:38:59,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:38:59,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:38:59,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:38:59,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:38:59" (1/3) ... [2020-08-22 16:38:59,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9dc4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:38:59, skipping insertion in model container [2020-08-22 16:38:59,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (2/3) ... [2020-08-22 16:38:59,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9dc4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:38:59, skipping insertion in model container [2020-08-22 16:38:59,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:38:59" (3/3) ... [2020-08-22 16:38:59,920 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-22 16:38:59,936 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:38:59,947 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:38:59,967 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:39:00,000 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:39:00,001 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:39:00,001 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:39:00,001 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:39:00,002 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:39:00,002 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:39:00,002 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:39:00,002 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:39:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-22 16:39:00,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:39:00,033 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:00,034 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 16:39:00,034 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:00,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:00,043 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-22 16:39:00,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:00,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684588272] [2020-08-22 16:39:00,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:00,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:00,282 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 16:39:00,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684588272] [2020-08-22 16:39:00,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:00,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:00,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250071429] [2020-08-22 16:39:00,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:00,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:00,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:00,318 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-22 16:39:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:00,408 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-22 16:39:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:00,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 16:39:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:00,423 INFO L225 Difference]: With dead ends: 81 [2020-08-22 16:39:00,423 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 16:39:00,427 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 16:39:00,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 16:39:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-22 16:39:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 16:39:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-22 16:39:00,472 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-22 16:39:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:00,473 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-22 16:39:00,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-22 16:39:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:39:00,474 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:00,474 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 16:39:00,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:39:00,475 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:00,476 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-22 16:39:00,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:00,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688462735] [2020-08-22 16:39:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:00,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:00,548 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 16:39:00,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688462735] [2020-08-22 16:39:00,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:00,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:00,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896236000] [2020-08-22 16:39:00,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:00,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:00,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:00,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:00,553 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-22 16:39:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:00,584 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-22 16:39:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:00,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 16:39:00,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:00,587 INFO L225 Difference]: With dead ends: 107 [2020-08-22 16:39:00,587 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 16:39:00,588 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 16:39:00,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 16:39:00,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-22 16:39:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 16:39:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-22 16:39:00,600 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-22 16:39:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:00,601 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-22 16:39:00,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-22 16:39:00,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:39:00,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:00,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:00,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:39:00,604 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:00,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:00,604 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-22 16:39:00,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:00,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923395064] [2020-08-22 16:39:00,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:00,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:00,659 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 16:39:00,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923395064] [2020-08-22 16:39:00,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:00,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:00,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461347472] [2020-08-22 16:39:00,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:00,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:00,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:00,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:00,662 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-22 16:39:00,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:00,707 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-22 16:39:00,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:00,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 16:39:00,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:00,710 INFO L225 Difference]: With dead ends: 99 [2020-08-22 16:39:00,710 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 16:39:00,711 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 16:39:00,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 16:39:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-22 16:39:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 16:39:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-22 16:39:00,723 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-22 16:39:00,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:00,724 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-22 16:39:00,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:00,724 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-22 16:39:00,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:39:00,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:00,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:00,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 16:39:00,726 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:00,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:00,727 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-22 16:39:00,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:00,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443908190] [2020-08-22 16:39:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:00,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:00,773 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 16:39:00,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443908190] [2020-08-22 16:39:00,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:00,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:00,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365407207] [2020-08-22 16:39:00,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:00,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:00,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:00,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:00,776 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-22 16:39:00,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:00,796 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-22 16:39:00,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:00,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 16:39:00,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:00,799 INFO L225 Difference]: With dead ends: 124 [2020-08-22 16:39:00,799 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 16:39:00,800 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 16:39:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 16:39:00,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-22 16:39:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 16:39:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-22 16:39:00,812 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-22 16:39:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:00,812 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-22 16:39:00,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-22 16:39:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:39:00,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:00,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:00,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 16:39:00,814 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:00,815 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-22 16:39:00,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:00,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977787300] [2020-08-22 16:39:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:00,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:00,864 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 16:39:00,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977787300] [2020-08-22 16:39:00,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:00,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:00,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710202774] [2020-08-22 16:39:00,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:00,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:00,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:00,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:00,867 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-22 16:39:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:00,890 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-22 16:39:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:00,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 16:39:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:00,893 INFO L225 Difference]: With dead ends: 204 [2020-08-22 16:39:00,893 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 16:39:00,894 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 16:39:00,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 16:39:00,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-22 16:39:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-22 16:39:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-22 16:39:00,910 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-22 16:39:00,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:00,910 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-22 16:39:00,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:00,911 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-22 16:39:00,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 16:39:00,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:00,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:00,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 16:39:00,913 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:00,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-22 16:39:00,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:00,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611644080] [2020-08-22 16:39:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:00,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:00,956 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 16:39:00,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611644080] [2020-08-22 16:39:00,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:00,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:00,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963878749] [2020-08-22 16:39:00,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:00,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:00,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:00,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:00,959 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-22 16:39:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:00,981 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-22 16:39:00,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:00,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 16:39:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:00,983 INFO L225 Difference]: With dead ends: 183 [2020-08-22 16:39:00,983 INFO L226 Difference]: Without dead ends: 126 [2020-08-22 16:39:00,984 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 16:39:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-22 16:39:00,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-22 16:39:00,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-22 16:39:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-22 16:39:00,998 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-22 16:39:00,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:00,999 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-22 16:39:00,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-22 16:39:01,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 16:39:01,000 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:01,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:01,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 16:39:01,001 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:01,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:01,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-22 16:39:01,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:01,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245022108] [2020-08-22 16:39:01,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,078 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 16:39:01,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245022108] [2020-08-22 16:39:01,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:01,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:01,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577466847] [2020-08-22 16:39:01,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:01,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:01,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:01,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:01,083 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-22 16:39:01,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:01,117 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-22 16:39:01,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:01,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 16:39:01,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:01,120 INFO L225 Difference]: With dead ends: 228 [2020-08-22 16:39:01,120 INFO L226 Difference]: Without dead ends: 226 [2020-08-22 16:39:01,121 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 16:39:01,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-22 16:39:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-22 16:39:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 16:39:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-22 16:39:01,137 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-22 16:39:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:01,138 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-22 16:39:01,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-22 16:39:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 16:39:01,140 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:01,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:01,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 16:39:01,141 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:01,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-22 16:39:01,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:01,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406574] [2020-08-22 16:39:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,172 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 16:39:01,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406574] [2020-08-22 16:39:01,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:01,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:01,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938736097] [2020-08-22 16:39:01,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:01,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:01,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:01,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:01,177 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-22 16:39:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:01,200 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-22 16:39:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:01,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 16:39:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:01,202 INFO L225 Difference]: With dead ends: 392 [2020-08-22 16:39:01,203 INFO L226 Difference]: Without dead ends: 234 [2020-08-22 16:39:01,205 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 16:39:01,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-22 16:39:01,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-22 16:39:01,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-22 16:39:01,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-22 16:39:01,223 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-22 16:39:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:01,224 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-22 16:39:01,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:01,224 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-22 16:39:01,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:39:01,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:01,226 INFO L422 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] [2020-08-22 16:39:01,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 16:39:01,227 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:01,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:01,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-22 16:39:01,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:01,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000626238] [2020-08-22 16:39:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,260 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 16:39:01,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000626238] [2020-08-22 16:39:01,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:01,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:01,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906839523] [2020-08-22 16:39:01,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:01,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:01,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:01,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:01,263 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-22 16:39:01,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:01,283 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-22 16:39:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:01,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 16:39:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:01,286 INFO L225 Difference]: With dead ends: 348 [2020-08-22 16:39:01,286 INFO L226 Difference]: Without dead ends: 238 [2020-08-22 16:39:01,287 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 16:39:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-22 16:39:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-22 16:39:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-22 16:39:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-22 16:39:01,303 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-22 16:39:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:01,304 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-22 16:39:01,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-22 16:39:01,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:39:01,306 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:01,306 INFO L422 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] [2020-08-22 16:39:01,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 16:39:01,307 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:01,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:01,307 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-22 16:39:01,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:01,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053386173] [2020-08-22 16:39:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,336 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 16:39:01,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053386173] [2020-08-22 16:39:01,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:01,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:01,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844440365] [2020-08-22 16:39:01,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:01,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:01,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:01,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:01,339 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-22 16:39:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:01,361 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-22 16:39:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:01,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 16:39:01,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:01,365 INFO L225 Difference]: With dead ends: 428 [2020-08-22 16:39:01,365 INFO L226 Difference]: Without dead ends: 426 [2020-08-22 16:39:01,366 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 16:39:01,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-22 16:39:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-22 16:39:01,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-22 16:39:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-22 16:39:01,382 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-22 16:39:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:01,383 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-22 16:39:01,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-22 16:39:01,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:39:01,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:01,386 INFO L422 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] [2020-08-22 16:39:01,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 16:39:01,387 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:01,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:01,387 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-22 16:39:01,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:01,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005777005] [2020-08-22 16:39:01,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,413 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 16:39:01,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005777005] [2020-08-22 16:39:01,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:01,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:01,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428948498] [2020-08-22 16:39:01,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:01,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:01,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:01,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:01,416 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-22 16:39:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:01,465 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-22 16:39:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:01,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 16:39:01,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:01,469 INFO L225 Difference]: With dead ends: 764 [2020-08-22 16:39:01,469 INFO L226 Difference]: Without dead ends: 450 [2020-08-22 16:39:01,473 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 16:39:01,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-22 16:39:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-22 16:39:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-22 16:39:01,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-22 16:39:01,516 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-22 16:39:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:01,516 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-22 16:39:01,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-22 16:39:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 16:39:01,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:01,518 INFO L422 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] [2020-08-22 16:39:01,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 16:39:01,518 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:01,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-22 16:39:01,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:01,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852339983] [2020-08-22 16:39:01,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,579 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 16:39:01,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852339983] [2020-08-22 16:39:01,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:01,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:01,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070358578] [2020-08-22 16:39:01,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:01,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:01,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:01,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:01,582 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-22 16:39:01,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:01,616 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-22 16:39:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:01,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 16:39:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:01,620 INFO L225 Difference]: With dead ends: 672 [2020-08-22 16:39:01,621 INFO L226 Difference]: Without dead ends: 458 [2020-08-22 16:39:01,623 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 16:39:01,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-22 16:39:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-22 16:39:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-22 16:39:01,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-22 16:39:01,641 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-22 16:39:01,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:01,642 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-22 16:39:01,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:01,642 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-22 16:39:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 16:39:01,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:01,646 INFO L422 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] [2020-08-22 16:39:01,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 16:39:01,647 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:01,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:01,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-22 16:39:01,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:01,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14363626] [2020-08-22 16:39:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,700 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 16:39:01,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14363626] [2020-08-22 16:39:01,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:01,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:01,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075030793] [2020-08-22 16:39:01,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:01,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:01,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:01,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:01,711 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-22 16:39:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:01,743 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-22 16:39:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:01,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 16:39:01,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:01,750 INFO L225 Difference]: With dead ends: 812 [2020-08-22 16:39:01,751 INFO L226 Difference]: Without dead ends: 810 [2020-08-22 16:39:01,752 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 16:39:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-22 16:39:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-22 16:39:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-22 16:39:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-22 16:39:01,773 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-22 16:39:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:01,775 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-22 16:39:01,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-22 16:39:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 16:39:01,777 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:01,777 INFO L422 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] [2020-08-22 16:39:01,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 16:39:01,778 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:01,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:01,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-22 16:39:01,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:01,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806604180] [2020-08-22 16:39:01,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,843 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 16:39:01,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806604180] [2020-08-22 16:39:01,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:01,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:01,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975121350] [2020-08-22 16:39:01,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:01,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:01,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:01,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:01,846 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-22 16:39:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:01,882 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-22 16:39:01,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:01,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 16:39:01,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:01,889 INFO L225 Difference]: With dead ends: 1500 [2020-08-22 16:39:01,889 INFO L226 Difference]: Without dead ends: 874 [2020-08-22 16:39:01,893 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 16:39:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-22 16:39:01,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-22 16:39:01,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-22 16:39:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-22 16:39:01,930 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-22 16:39:01,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:01,930 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-22 16:39:01,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-22 16:39:01,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:39:01,932 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:01,932 INFO L422 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] [2020-08-22 16:39:01,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 16:39:01,934 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:01,935 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-22 16:39:01,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:01,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840867955] [2020-08-22 16:39:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:01,970 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 16:39:01,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840867955] [2020-08-22 16:39:01,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:01,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:01,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280725201] [2020-08-22 16:39:01,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:01,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:01,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:01,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:01,974 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-22 16:39:02,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:02,007 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-22 16:39:02,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:02,008 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 16:39:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:02,013 INFO L225 Difference]: With dead ends: 1308 [2020-08-22 16:39:02,013 INFO L226 Difference]: Without dead ends: 890 [2020-08-22 16:39:02,015 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 16:39:02,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-22 16:39:02,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-22 16:39:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-22 16:39:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-22 16:39:02,062 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-22 16:39:02,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:02,064 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-22 16:39:02,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-22 16:39:02,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:39:02,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:02,067 INFO L422 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] [2020-08-22 16:39:02,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 16:39:02,067 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:02,068 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-22 16:39:02,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:02,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152844924] [2020-08-22 16:39:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:02,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:02,091 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 16:39:02,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152844924] [2020-08-22 16:39:02,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:02,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:02,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325103233] [2020-08-22 16:39:02,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:02,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:02,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:02,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:02,094 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-22 16:39:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:02,132 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-22 16:39:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:02,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 16:39:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:02,141 INFO L225 Difference]: With dead ends: 1548 [2020-08-22 16:39:02,141 INFO L226 Difference]: Without dead ends: 1546 [2020-08-22 16:39:02,142 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 16:39:02,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-22 16:39:02,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-22 16:39:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-22 16:39:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-22 16:39:02,185 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-22 16:39:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:02,186 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-22 16:39:02,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-22 16:39:02,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:39:02,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:02,189 INFO L422 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] [2020-08-22 16:39:02,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 16:39:02,189 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:02,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:02,190 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-22 16:39:02,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:02,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523584531] [2020-08-22 16:39:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:02,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:02,214 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 16:39:02,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523584531] [2020-08-22 16:39:02,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:02,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:02,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161058885] [2020-08-22 16:39:02,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:02,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:02,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:02,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:02,216 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-22 16:39:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:02,265 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-22 16:39:02,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:02,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 16:39:02,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:02,275 INFO L225 Difference]: With dead ends: 2956 [2020-08-22 16:39:02,275 INFO L226 Difference]: Without dead ends: 1706 [2020-08-22 16:39:02,279 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 16:39:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-22 16:39:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-22 16:39:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-22 16:39:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-22 16:39:02,350 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-22 16:39:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:02,350 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-22 16:39:02,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-22 16:39:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:39:02,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:02,355 INFO L422 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] [2020-08-22 16:39:02,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 16:39:02,356 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:02,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:02,356 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-22 16:39:02,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:02,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443350210] [2020-08-22 16:39:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:02,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:02,383 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 16:39:02,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443350210] [2020-08-22 16:39:02,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:02,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:02,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635328560] [2020-08-22 16:39:02,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:02,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:02,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:02,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:02,385 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-22 16:39:02,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:02,450 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-22 16:39:02,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:02,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 16:39:02,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:02,460 INFO L225 Difference]: With dead ends: 2556 [2020-08-22 16:39:02,460 INFO L226 Difference]: Without dead ends: 1738 [2020-08-22 16:39:02,463 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 16:39:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-22 16:39:02,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-22 16:39:02,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-22 16:39:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-22 16:39:02,537 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-22 16:39:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:02,538 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-22 16:39:02,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-22 16:39:02,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:39:02,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:02,542 INFO L422 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] [2020-08-22 16:39:02,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 16:39:02,543 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:02,544 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-22 16:39:02,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:02,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628764854] [2020-08-22 16:39:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:02,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:02,570 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 16:39:02,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628764854] [2020-08-22 16:39:02,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:02,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:02,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105966312] [2020-08-22 16:39:02,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:02,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:02,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:02,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:02,573 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-22 16:39:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:02,641 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-22 16:39:02,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:02,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 16:39:02,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:02,657 INFO L225 Difference]: With dead ends: 2956 [2020-08-22 16:39:02,657 INFO L226 Difference]: Without dead ends: 2954 [2020-08-22 16:39:02,659 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 16:39:02,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-22 16:39:02,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-22 16:39:02,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-22 16:39:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-22 16:39:02,782 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-22 16:39:02,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:02,782 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-22 16:39:02,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-22 16:39:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:39:02,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:02,787 INFO L422 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] [2020-08-22 16:39:02,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 16:39:02,788 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:02,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:02,788 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-22 16:39:02,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:02,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619242665] [2020-08-22 16:39:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:02,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:02,810 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 16:39:02,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619242665] [2020-08-22 16:39:02,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:02,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:02,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665548684] [2020-08-22 16:39:02,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:02,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:02,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:02,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:02,813 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-22 16:39:02,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:02,890 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-22 16:39:02,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:02,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 16:39:02,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:02,908 INFO L225 Difference]: With dead ends: 5836 [2020-08-22 16:39:02,909 INFO L226 Difference]: Without dead ends: 3338 [2020-08-22 16:39:02,915 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 16:39:02,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-22 16:39:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-22 16:39:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-22 16:39:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-22 16:39:03,021 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-22 16:39:03,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:03,021 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-22 16:39:03,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:03,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-22 16:39:03,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 16:39:03,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:03,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:03,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 16:39:03,027 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:03,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:03,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-22 16:39:03,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:03,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140946656] [2020-08-22 16:39:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:03,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:03,046 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 16:39:03,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140946656] [2020-08-22 16:39:03,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:03,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:03,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792418770] [2020-08-22 16:39:03,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:03,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:03,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:03,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:03,048 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-22 16:39:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:03,108 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-22 16:39:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:03,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 16:39:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:03,125 INFO L225 Difference]: With dead ends: 5004 [2020-08-22 16:39:03,126 INFO L226 Difference]: Without dead ends: 3402 [2020-08-22 16:39:03,130 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 16:39:03,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-22 16:39:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-22 16:39:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-22 16:39:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-22 16:39:03,280 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-22 16:39:03,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:03,280 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-22 16:39:03,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-22 16:39:03,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 16:39:03,286 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:03,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:03,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 16:39:03,286 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:03,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:03,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-22 16:39:03,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:03,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749594282] [2020-08-22 16:39:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:03,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:03,308 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 16:39:03,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749594282] [2020-08-22 16:39:03,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:03,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:03,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471892039] [2020-08-22 16:39:03,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:03,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:03,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:03,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:03,310 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-22 16:39:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:03,421 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-22 16:39:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:03,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 16:39:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:03,454 INFO L225 Difference]: With dead ends: 9804 [2020-08-22 16:39:03,454 INFO L226 Difference]: Without dead ends: 6538 [2020-08-22 16:39:03,463 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 16:39:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-22 16:39:03,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-22 16:39:03,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-22 16:39:03,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-22 16:39:03,663 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-22 16:39:03,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:03,663 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-22 16:39:03,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:03,664 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-22 16:39:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 16:39:03,673 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:03,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:03,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 16:39:03,674 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:03,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:03,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-22 16:39:03,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:03,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774334499] [2020-08-22 16:39:03,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:03,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:03,698 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 16:39:03,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774334499] [2020-08-22 16:39:03,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:03,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:03,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113111503] [2020-08-22 16:39:03,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:03,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:03,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:03,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:03,701 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-22 16:39:03,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:03,920 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-22 16:39:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:03,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 16:39:03,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:03,940 INFO L225 Difference]: With dead ends: 7052 [2020-08-22 16:39:03,941 INFO L226 Difference]: Without dead ends: 7050 [2020-08-22 16:39:03,944 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 16:39:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-22 16:39:04,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-22 16:39:04,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-22 16:39:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-22 16:39:04,125 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-22 16:39:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:04,125 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-22 16:39:04,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-22 16:39:04,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 16:39:04,136 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:04,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:04,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 16:39:04,137 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-22 16:39:04,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:04,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193284848] [2020-08-22 16:39:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:04,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:04,161 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 16:39:04,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193284848] [2020-08-22 16:39:04,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:04,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:04,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703451957] [2020-08-22 16:39:04,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:04,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:04,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:04,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:04,163 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-22 16:39:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:04,313 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-22 16:39:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:04,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 16:39:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:04,338 INFO L225 Difference]: With dead ends: 10634 [2020-08-22 16:39:04,338 INFO L226 Difference]: Without dead ends: 10632 [2020-08-22 16:39:04,345 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 16:39:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-22 16:39:04,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-22 16:39:04,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-22 16:39:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-22 16:39:04,605 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-22 16:39:04,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:04,605 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-22 16:39:04,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-22 16:39:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 16:39:04,621 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:04,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:04,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 16:39:04,622 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:04,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:04,622 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-22 16:39:04,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:04,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399259491] [2020-08-22 16:39:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:04,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:04,641 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 16:39:04,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399259491] [2020-08-22 16:39:04,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:04,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:04,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529844122] [2020-08-22 16:39:04,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:04,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:04,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:04,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:04,643 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-22 16:39:04,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:04,829 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-22 16:39:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:04,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 16:39:04,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:04,830 INFO L225 Difference]: With dead ends: 22664 [2020-08-22 16:39:04,831 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:39:04,864 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 16:39:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:39:04,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:39:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:39:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:39:04,866 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-22 16:39:04,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:04,866 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:39:04,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:04,866 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:39:04,866 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:39:04,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 16:39:04,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:39:04,893 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 16:39:04,893 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:39:04,893 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:39:04,894 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:39:04,894 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:39:04,894 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:39:04,894 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,894 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-22 16:39:04,894 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,894 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-22 16:39:04,894 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,895 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-22 16:39:04,895 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,895 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-22 16:39:04,895 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,895 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,895 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-22 16:39:04,895 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-22 16:39:04,895 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-22 16:39:04,896 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,896 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-22 16:39:04,896 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,896 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-22 16:39:04,896 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-22 16:39:04,896 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-22 16:39:04,896 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-22 16:39:04,896 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,897 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,897 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,897 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-22 16:39:04,897 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,897 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,897 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-22 16:39:04,897 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-22 16:39:04,897 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-22 16:39:04,898 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,898 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,898 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-22 16:39:04,898 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-22 16:39:04,898 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,898 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-22 16:39:04,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:39:04 BoogieIcfgContainer [2020-08-22 16:39:04,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:39:04,914 INFO L168 Benchmark]: Toolchain (without parser) took 5829.53 ms. Allocated memory was 140.5 MB in the beginning and 355.5 MB in the end (delta: 215.0 MB). Free memory was 103.4 MB in the beginning and 141.7 MB in the end (delta: -38.3 MB). Peak memory consumption was 176.7 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:04,915 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:39:04,915 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.44 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 92.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:04,916 INFO L168 Benchmark]: Boogie Preprocessor took 132.30 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 180.8 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:04,916 INFO L168 Benchmark]: RCFGBuilder took 375.92 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 162.5 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:04,917 INFO L168 Benchmark]: TraceAbstraction took 5001.47 ms. Allocated memory was 203.4 MB in the beginning and 355.5 MB in the end (delta: 152.0 MB). Free memory was 161.8 MB in the beginning and 141.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 172.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:04,919 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 310.44 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 92.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.30 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 180.8 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 375.92 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 162.5 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5001.47 ms. Allocated memory was 203.4 MB in the beginning and 355.5 MB in the end (delta: 152.0 MB). Free memory was 161.8 MB in the beginning and 141.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 172.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: 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: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.8s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 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...