/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/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 10:57:03,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 10:57:03,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 10:57:03,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 10:57:03,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 10:57:03,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 10:57:03,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 10:57:03,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 10:57:03,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 10:57:03,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 10:57:03,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 10:57:03,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 10:57:03,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 10:57:03,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 10:57:03,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 10:57:03,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 10:57:03,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 10:57:03,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 10:57:03,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 10:57:03,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 10:57:03,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 10:57:03,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 10:57:03,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 10:57:03,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 10:57:03,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 10:57:03,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 10:57:03,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 10:57:03,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 10:57:03,183 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 [2020-07-07 10:57:03,198 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 10:57:03,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 10:57:03,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 10:57:03,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 10:57:03,200 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 10:57:03,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 10:57:03,200 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 10:57:03,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 10:57:03,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 10:57:03,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 10:57:03,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 10:57:03,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 10:57:03,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 10:57:03,201 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 10:57:03,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 10:57:03,202 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 10:57:03,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 10:57:03,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 10:57:03,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 10:57:03,203 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 10:57:03,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 10:57:03,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 10:57:03,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 10:57:03,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 10:57:03,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 10:57:03,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 10:57:03,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 10:57:03,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 10:57:03,205 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 10:57:03,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 10:57:03,502 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 10:57:03,516 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 10:57:03,520 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 10:57:03,521 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 10:57:03,521 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 10:57:03,522 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-07 10:57:03,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1da9e00e/b937c86e32ca4ac7826caaa54a779356/FLAGf82390eb8 [2020-07-07 10:57:04,089 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 10:57:04,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-07 10:57:04,097 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1da9e00e/b937c86e32ca4ac7826caaa54a779356/FLAGf82390eb8 [2020-07-07 10:57:04,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1da9e00e/b937c86e32ca4ac7826caaa54a779356 [2020-07-07 10:57:04,497 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 10:57:04,500 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 10:57:04,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 10:57:04,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 10:57:04,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 10:57:04,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:57:04" (1/1) ... [2020-07-07 10:57:04,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5083de1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:04, skipping insertion in model container [2020-07-07 10:57:04,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:57:04" (1/1) ... [2020-07-07 10:57:04,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 10:57:04,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 10:57:04,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:57:04,717 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 10:57:04,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:57:04,752 INFO L208 MainTranslator]: Completed translation [2020-07-07 10:57:04,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:04 WrapperNode [2020-07-07 10:57:04,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 10:57:04,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 10:57:04,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 10:57:04,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 10:57:04,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:04" (1/1) ... [2020-07-07 10:57:04,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:04" (1/1) ... [2020-07-07 10:57:04,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:04" (1/1) ... [2020-07-07 10:57:04,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:04" (1/1) ... [2020-07-07 10:57:04,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:04" (1/1) ... [2020-07-07 10:57:04,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:04" (1/1) ... [2020-07-07 10:57:04,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:04" (1/1) ... [2020-07-07 10:57:04,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 10:57:04,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 10:57:04,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 10:57:04,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 10:57:04,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:04" (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 [2020-07-07 10:57:04,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 10:57:04,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 10:57:04,936 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-07-07 10:57:04,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 10:57:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 10:57:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 10:57:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-07-07 10:57:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 10:57:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 10:57:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 10:57:05,149 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 10:57:05,149 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 10:57:05,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:57:05 BoogieIcfgContainer [2020-07-07 10:57:05,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 10:57:05,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 10:57:05,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 10:57:05,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 10:57:05,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 10:57:04" (1/3) ... [2020-07-07 10:57:05,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71de25ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:57:05, skipping insertion in model container [2020-07-07 10:57:05,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:57:04" (2/3) ... [2020-07-07 10:57:05,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71de25ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:57:05, skipping insertion in model container [2020-07-07 10:57:05,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:57:05" (3/3) ... [2020-07-07 10:57:05,164 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-07-07 10:57:05,176 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 10:57:05,184 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 10:57:05,212 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 10:57:05,281 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 10:57:05,281 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 10:57:05,281 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 10:57:05,281 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 10:57:05,281 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 10:57:05,282 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 10:57:05,282 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 10:57:05,282 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 10:57:05,302 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-07 10:57:05,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-07 10:57:05,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:05,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:05,313 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:05,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:05,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1001932622, now seen corresponding path program 1 times [2020-07-07 10:57:05,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:05,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733390779] [2020-07-07 10:57:05,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 10:57:05,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733390779] [2020-07-07 10:57:05,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:57:05,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 10:57:05,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796269806] [2020-07-07 10:57:05,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 10:57:05,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:05,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 10:57:05,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:57:05,723 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-07-07 10:57:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:05,890 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-07 10:57:05,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 10:57:05,892 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-07 10:57:05,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:05,908 INFO L225 Difference]: With dead ends: 40 [2020-07-07 10:57:05,908 INFO L226 Difference]: Without dead ends: 24 [2020-07-07 10:57:05,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:57:05,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-07 10:57:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-07 10:57:05,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 10:57:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-07 10:57:05,964 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-07-07 10:57:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:05,965 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-07 10:57:05,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 10:57:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-07 10:57:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 10:57:05,967 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:05,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:05,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 10:57:05,968 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash -423841111, now seen corresponding path program 1 times [2020-07-07 10:57:05,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:05,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317501085] [2020-07-07 10:57:05,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 10:57:06,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317501085] [2020-07-07 10:57:06,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:57:06,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 10:57:06,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994729219] [2020-07-07 10:57:06,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 10:57:06,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:06,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 10:57:06,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:57:06,077 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-07 10:57:06,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:06,154 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-07 10:57:06,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 10:57:06,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-07 10:57:06,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:06,156 INFO L225 Difference]: With dead ends: 30 [2020-07-07 10:57:06,157 INFO L226 Difference]: Without dead ends: 26 [2020-07-07 10:57:06,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:57:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-07 10:57:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-07 10:57:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 10:57:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-07-07 10:57:06,167 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-07-07 10:57:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:06,167 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-07-07 10:57:06,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 10:57:06,168 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-07-07 10:57:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-07 10:57:06,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:06,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:06,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 10:57:06,170 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:06,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1280495258, now seen corresponding path program 1 times [2020-07-07 10:57:06,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:06,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498288938] [2020-07-07 10:57:06,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 10:57:06,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498288938] [2020-07-07 10:57:06,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:57:06,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 10:57:06,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879415468] [2020-07-07 10:57:06,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 10:57:06,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:06,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 10:57:06,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:57:06,292 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-07-07 10:57:06,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:06,403 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-07-07 10:57:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 10:57:06,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-07 10:57:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:06,405 INFO L225 Difference]: With dead ends: 36 [2020-07-07 10:57:06,406 INFO L226 Difference]: Without dead ends: 28 [2020-07-07 10:57:06,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-07 10:57:06,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-07 10:57:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-07 10:57:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-07 10:57:06,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-07-07 10:57:06,416 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 23 [2020-07-07 10:57:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:06,417 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-07-07 10:57:06,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 10:57:06,417 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-07-07 10:57:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-07 10:57:06,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:06,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:06,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 10:57:06,420 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:06,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:06,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1668712292, now seen corresponding path program 1 times [2020-07-07 10:57:06,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:06,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565788773] [2020-07-07 10:57:06,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 10:57:06,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565788773] [2020-07-07 10:57:06,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:57:06,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 10:57:06,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743305085] [2020-07-07 10:57:06,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 10:57:06,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:06,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 10:57:06,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:57:06,597 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2020-07-07 10:57:06,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:06,724 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-07 10:57:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 10:57:06,725 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-07-07 10:57:06,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:06,726 INFO L225 Difference]: With dead ends: 36 [2020-07-07 10:57:06,727 INFO L226 Difference]: Without dead ends: 26 [2020-07-07 10:57:06,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-07 10:57:06,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-07 10:57:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-07 10:57:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 10:57:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-07 10:57:06,735 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 23 [2020-07-07 10:57:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:06,735 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-07 10:57:06,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 10:57:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-07 10:57:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 10:57:06,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:06,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:06,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 10:57:06,737 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:06,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:06,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1139697511, now seen corresponding path program 1 times [2020-07-07 10:57:06,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:06,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312712310] [2020-07-07 10:57:06,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 10:57:06,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312712310] [2020-07-07 10:57:06,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:57:06,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 10:57:06,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587495364] [2020-07-07 10:57:06,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 10:57:06,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:06,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 10:57:06,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:57:06,824 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-07-07 10:57:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:06,870 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-07 10:57:06,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 10:57:06,871 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-07 10:57:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:06,872 INFO L225 Difference]: With dead ends: 31 [2020-07-07 10:57:06,872 INFO L226 Difference]: Without dead ends: 27 [2020-07-07 10:57:06,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-07 10:57:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-07 10:57:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-07 10:57:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-07 10:57:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-07 10:57:06,879 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2020-07-07 10:57:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:06,880 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-07 10:57:06,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 10:57:06,880 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-07 10:57:06,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 10:57:06,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:06,881 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:06,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 10:57:06,882 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:06,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:06,882 INFO L82 PathProgramCache]: Analyzing trace with hash 99153721, now seen corresponding path program 1 times [2020-07-07 10:57:06,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:06,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084604395] [2020-07-07 10:57:06,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-07 10:57:06,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084604395] [2020-07-07 10:57:06,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:57:06,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 10:57:06,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197038684] [2020-07-07 10:57:06,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 10:57:06,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:06,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 10:57:06,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:57:06,970 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-07-07 10:57:07,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:07,017 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-07-07 10:57:07,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 10:57:07,018 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-07 10:57:07,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:07,019 INFO L225 Difference]: With dead ends: 34 [2020-07-07 10:57:07,019 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 10:57:07,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-07 10:57:07,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 10:57:07,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 10:57:07,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 10:57:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-07-07 10:57:07,027 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2020-07-07 10:57:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:07,027 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-07-07 10:57:07,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 10:57:07,027 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-07-07 10:57:07,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-07 10:57:07,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:07,029 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:07,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 10:57:07,029 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:07,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:07,030 INFO L82 PathProgramCache]: Analyzing trace with hash 10057033, now seen corresponding path program 1 times [2020-07-07 10:57:07,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:07,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595227516] [2020-07-07 10:57:07,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-07 10:57:07,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595227516] [2020-07-07 10:57:07,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:57:07,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 10:57:07,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498875713] [2020-07-07 10:57:07,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 10:57:07,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:07,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 10:57:07,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-07 10:57:07,164 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 8 states. [2020-07-07 10:57:07,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:07,248 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-07 10:57:07,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 10:57:07,248 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-07-07 10:57:07,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:07,249 INFO L225 Difference]: With dead ends: 30 [2020-07-07 10:57:07,249 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 10:57:07,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-07 10:57:07,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 10:57:07,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 10:57:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 10:57:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 10:57:07,253 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2020-07-07 10:57:07,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:07,254 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 10:57:07,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 10:57:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 10:57:07,254 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 10:57:07,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 10:57:07,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 10:57:07,336 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 10:57:07,336 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 10:57:07,337 INFO L268 CegarLoopResult]: For program point gcdFINAL(lines 15 26) no Hoare annotation was computed. [2020-07-07 10:57:07,337 INFO L268 CegarLoopResult]: For program point gcdEXIT(lines 15 26) no Hoare annotation was computed. [2020-07-07 10:57:07,337 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 gcd_~y1) (= gcd_~y1 |gcd_#in~y1|) (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2)) [2020-07-07 10:57:07,337 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-07 10:57:07,338 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-07-07 10:57:07,338 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= (+ gcd_~y2 1) gcd_~y1) (<= 1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (= gcd_~y2 |gcd_#in~y2|)) [2020-07-07 10:57:07,338 INFO L268 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-07-07 10:57:07,338 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-07 10:57:07,338 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-07 10:57:07,338 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-07 10:57:07,339 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 10:57:07,339 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 10:57:07,339 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 10:57:07,339 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 10:57:07,339 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-07 10:57:07,339 INFO L268 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-07-07 10:57:07,340 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-07-07 10:57:07,340 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 28 43) no Hoare annotation was computed. [2020-07-07 10:57:07,340 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-07 10:57:07,340 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-07-07 10:57:07,340 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 1 main_~m~0) (<= 1 main_~n~0)) [2020-07-07 10:57:07,341 INFO L268 CegarLoopResult]: For program point L38-1(lines 28 43) no Hoare annotation was computed. [2020-07-07 10:57:07,341 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-07 10:57:07,341 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-07 10:57:07,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 10:57:07 BoogieIcfgContainer [2020-07-07 10:57:07,348 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 10:57:07,351 INFO L168 Benchmark]: Toolchain (without parser) took 2850.90 ms. Allocated memory was 143.7 MB in the beginning and 230.7 MB in the end (delta: 87.0 MB). Free memory was 101.2 MB in the beginning and 115.0 MB in the end (delta: -13.8 MB). Peak memory consumption was 73.3 MB. Max. memory is 7.1 GB. [2020-07-07 10:57:07,352 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 10:57:07,353 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.41 ms. Allocated memory is still 143.7 MB. Free memory was 101.0 MB in the beginning and 91.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-07 10:57:07,353 INFO L168 Benchmark]: Boogie Preprocessor took 31.41 ms. Allocated memory is still 143.7 MB. Free memory was 91.4 MB in the beginning and 90.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 10:57:07,354 INFO L168 Benchmark]: RCFGBuilder took 368.58 ms. Allocated memory was 143.7 MB in the beginning and 200.8 MB in the end (delta: 57.1 MB). Free memory was 90.0 MB in the beginning and 167.0 MB in the end (delta: -77.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-07 10:57:07,355 INFO L168 Benchmark]: TraceAbstraction took 2193.00 ms. Allocated memory was 200.8 MB in the beginning and 230.7 MB in the end (delta: 29.9 MB). Free memory was 166.3 MB in the beginning and 115.0 MB in the end (delta: 51.3 MB). Peak memory consumption was 81.2 MB. Max. memory is 7.1 GB. [2020-07-07 10:57:07,359 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.41 ms. Allocated memory is still 143.7 MB. Free memory was 101.0 MB in the beginning and 91.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.41 ms. Allocated memory is still 143.7 MB. Free memory was 91.4 MB in the beginning and 90.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 368.58 ms. Allocated memory was 143.7 MB in the beginning and 200.8 MB in the end (delta: 57.1 MB). Free memory was 90.0 MB in the beginning and 167.0 MB in the end (delta: -77.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2193.00 ms. Allocated memory was 200.8 MB in the beginning and 230.7 MB in the end (delta: 29.9 MB). Free memory was 166.3 MB in the beginning and 115.0 MB in the end (delta: 51.3 MB). Peak memory consumption was 81.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 91 SDslu, 475 SDs, 0 SdLazy, 273 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 107 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 40 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 157 NumberOfCodeBlocks, 157 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 6864 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 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...