/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 21:53:52,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 21:53:52,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 21:53:52,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 21:53:52,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 21:53:52,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 21:53:52,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 21:53:52,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 21:53:52,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 21:53:52,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 21:53:52,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 21:53:52,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 21:53:52,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 21:53:52,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 21:53:52,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 21:53:52,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 21:53:52,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 21:53:52,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 21:53:52,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 21:53:52,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 21:53:52,154 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 21:53:52,164 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 21:53:52,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 21:53:52,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 21:53:52,166 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 21:53:52,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 21:53:52,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 21:53:52,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 21:53:52,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 21:53:52,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 21:53:52,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 21:53:52,167 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 21:53:52,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 21:53:52,168 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 21:53:52,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 21:53:52,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 21:53:52,168 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 21:53:52,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 21:53:52,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 21:53:52,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 21:53:52,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 21:53:52,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 21:53:52,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 21:53:52,170 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 21:53:52,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 21:53:52,487 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 21:53:52,490 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 21:53:52,492 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 21:53:52,492 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 21:53:52,493 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-08-22 21:53:52,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fb1fc96f/95e3f56379af4f98915220f03451c42e/FLAG29cd51164 [2020-08-22 21:53:52,997 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 21:53:52,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-08-22 21:53:53,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fb1fc96f/95e3f56379af4f98915220f03451c42e/FLAG29cd51164 [2020-08-22 21:53:53,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fb1fc96f/95e3f56379af4f98915220f03451c42e [2020-08-22 21:53:53,436 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 21:53:53,439 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 21:53:53,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 21:53:53,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 21:53:53,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 21:53:53,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:53:53" (1/1) ... [2020-08-22 21:53:53,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18725080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:53, skipping insertion in model container [2020-08-22 21:53:53,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:53:53" (1/1) ... [2020-08-22 21:53:53,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 21:53:53,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 21:53:53,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:53:53,686 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 21:53:53,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:53:53,716 INFO L208 MainTranslator]: Completed translation [2020-08-22 21:53:53,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:53 WrapperNode [2020-08-22 21:53:53,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 21:53:53,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 21:53:53,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 21:53:53,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 21:53:53,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:53" (1/1) ... [2020-08-22 21:53:53,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:53" (1/1) ... [2020-08-22 21:53:53,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:53" (1/1) ... [2020-08-22 21:53:53,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:53" (1/1) ... [2020-08-22 21:53:53,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:53" (1/1) ... [2020-08-22 21:53:53,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:53" (1/1) ... [2020-08-22 21:53:53,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:53" (1/1) ... [2020-08-22 21:53:53,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 21:53:53,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 21:53:53,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 21:53:53,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 21:53:53,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:53" (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 21:53:53,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 21:53:53,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 21:53:53,897 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-08-22 21:53:53,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 21:53:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 21:53:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 21:53:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-08-22 21:53:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 21:53:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 21:53:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 21:53:54,135 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 21:53:54,136 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 21:53:54,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:53:54 BoogieIcfgContainer [2020-08-22 21:53:54,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 21:53:54,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 21:53:54,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 21:53:54,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 21:53:54,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 09:53:53" (1/3) ... [2020-08-22 21:53:54,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f99abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:53:54, skipping insertion in model container [2020-08-22 21:53:54,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:53:53" (2/3) ... [2020-08-22 21:53:54,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f99abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:53:54, skipping insertion in model container [2020-08-22 21:53:54,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:53:54" (3/3) ... [2020-08-22 21:53:54,151 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-08-22 21:53:54,163 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 21:53:54,174 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 21:53:54,192 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 21:53:54,218 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 21:53:54,218 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 21:53:54,219 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 21:53:54,219 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 21:53:54,219 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 21:53:54,219 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 21:53:54,219 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 21:53:54,219 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 21:53:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-08-22 21:53:54,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 21:53:54,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:54,275 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 21:53:54,275 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:54,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1470222128, now seen corresponding path program 1 times [2020-08-22 21:53:54,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:54,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299509027] [2020-08-22 21:53:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:54,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:54,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:54,668 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 21:53:54,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299509027] [2020-08-22 21:53:54,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:53:54,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 21:53:54,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044147798] [2020-08-22 21:53:54,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 21:53:54,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:54,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 21:53:54,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 21:53:54,694 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 7 states. [2020-08-22 21:53:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:54,857 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-08-22 21:53:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 21:53:54,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-22 21:53:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:54,873 INFO L225 Difference]: With dead ends: 60 [2020-08-22 21:53:54,873 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 21:53:54,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:53:54,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 21:53:54,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-08-22 21:53:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 21:53:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-08-22 21:53:54,935 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2020-08-22 21:53:54,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:54,936 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-08-22 21:53:54,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 21:53:54,937 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-08-22 21:53:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 21:53:54,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:54,940 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 21:53:54,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 21:53:54,941 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:54,941 INFO L82 PathProgramCache]: Analyzing trace with hash 831268307, now seen corresponding path program 1 times [2020-08-22 21:53:54,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:54,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241065241] [2020-08-22 21:53:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:54,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:54,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,022 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 21:53:55,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241065241] [2020-08-22 21:53:55,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:53:55,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 21:53:55,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681104762] [2020-08-22 21:53:55,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 21:53:55,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:55,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 21:53:55,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 21:53:55,027 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-08-22 21:53:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:55,111 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-08-22 21:53:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 21:53:55,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-08-22 21:53:55,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:55,113 INFO L225 Difference]: With dead ends: 46 [2020-08-22 21:53:55,114 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 21:53:55,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:53:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 21:53:55,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-08-22 21:53:55,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 21:53:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-08-22 21:53:55,129 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 25 [2020-08-22 21:53:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:55,130 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-08-22 21:53:55,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 21:53:55,130 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-08-22 21:53:55,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 21:53:55,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:55,132 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:55,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 21:53:55,132 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:55,133 INFO L82 PathProgramCache]: Analyzing trace with hash -852904039, now seen corresponding path program 1 times [2020-08-22 21:53:55,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:55,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824342426] [2020-08-22 21:53:55,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 21:53:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 21:53:55,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824342426] [2020-08-22 21:53:55,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:53:55,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 21:53:55,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503691506] [2020-08-22 21:53:55,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 21:53:55,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:55,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 21:53:55,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:53:55,347 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 8 states. [2020-08-22 21:53:55,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:55,514 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-08-22 21:53:55,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 21:53:55,515 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-08-22 21:53:55,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:55,517 INFO L225 Difference]: With dead ends: 56 [2020-08-22 21:53:55,517 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 21:53:55,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-08-22 21:53:55,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 21:53:55,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-22 21:53:55,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 21:53:55,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-22 21:53:55,531 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 35 [2020-08-22 21:53:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:55,531 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-22 21:53:55,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 21:53:55,532 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-22 21:53:55,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 21:53:55,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:55,534 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:55,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 21:53:55,534 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:55,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:55,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2030561919, now seen corresponding path program 1 times [2020-08-22 21:53:55,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:55,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137932751] [2020-08-22 21:53:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 21:53:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 21:53:55,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137932751] [2020-08-22 21:53:55,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:53:55,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 21:53:55,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953568906] [2020-08-22 21:53:55,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 21:53:55,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:55,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 21:53:55,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 21:53:55,637 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2020-08-22 21:53:55,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:55,752 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-08-22 21:53:55,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 21:53:55,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-08-22 21:53:55,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:55,754 INFO L225 Difference]: With dead ends: 56 [2020-08-22 21:53:55,755 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 21:53:55,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-22 21:53:55,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 21:53:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-08-22 21:53:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 21:53:55,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-22 21:53:55,766 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 35 [2020-08-22 21:53:55,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:55,767 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-22 21:53:55,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 21:53:55,767 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-22 21:53:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 21:53:55,769 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:55,769 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2020-08-22 21:53:55,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 21:53:55,770 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:55,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:55,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2122258312, now seen corresponding path program 1 times [2020-08-22 21:53:55,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:55,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170173296] [2020-08-22 21:53:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 21:53:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 21:53:55,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170173296] [2020-08-22 21:53:55,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:53:55,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 21:53:55,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905177050] [2020-08-22 21:53:55,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 21:53:55,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:55,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 21:53:55,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 21:53:55,860 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2020-08-22 21:53:55,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:55,946 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-08-22 21:53:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 21:53:55,946 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-08-22 21:53:55,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:55,948 INFO L225 Difference]: With dead ends: 48 [2020-08-22 21:53:55,948 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 21:53:55,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:53:55,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 21:53:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-22 21:53:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 21:53:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-08-22 21:53:55,959 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2020-08-22 21:53:55,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:55,959 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-08-22 21:53:55,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 21:53:55,959 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-08-22 21:53:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 21:53:55,961 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:55,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2020-08-22 21:53:55,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 21:53:55,962 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:55,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:55,962 INFO L82 PathProgramCache]: Analyzing trace with hash 404002040, now seen corresponding path program 1 times [2020-08-22 21:53:55,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:55,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770580341] [2020-08-22 21:53:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:55,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 21:53:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 21:53:56,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770580341] [2020-08-22 21:53:56,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:53:56,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 21:53:56,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238694521] [2020-08-22 21:53:56,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 21:53:56,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:56,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 21:53:56,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 21:53:56,038 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 7 states. [2020-08-22 21:53:56,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:56,125 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-08-22 21:53:56,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 21:53:56,126 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-08-22 21:53:56,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:56,127 INFO L225 Difference]: With dead ends: 53 [2020-08-22 21:53:56,127 INFO L226 Difference]: Without dead ends: 47 [2020-08-22 21:53:56,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:53:56,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-22 21:53:56,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-08-22 21:53:56,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 21:53:56,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-08-22 21:53:56,141 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 36 [2020-08-22 21:53:56,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:56,142 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-08-22 21:53:56,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 21:53:56,142 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-08-22 21:53:56,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 21:53:56,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:53:56,145 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:53:56,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 21:53:56,145 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:53:56,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:53:56,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1010225367, now seen corresponding path program 1 times [2020-08-22 21:53:56,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:53:56,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323003804] [2020-08-22 21:53:56,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:53:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:53:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 21:53:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 21:53:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 21:53:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:53:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 21:53:56,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323003804] [2020-08-22 21:53:56,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:53:56,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 21:53:56,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018298247] [2020-08-22 21:53:56,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 21:53:56,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:53:56,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 21:53:56,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:53:56,257 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 8 states. [2020-08-22 21:53:56,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:53:56,382 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-08-22 21:53:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 21:53:56,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-08-22 21:53:56,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:53:56,383 INFO L225 Difference]: With dead ends: 47 [2020-08-22 21:53:56,383 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 21:53:56,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-08-22 21:53:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 21:53:56,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 21:53:56,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 21:53:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 21:53:56,386 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2020-08-22 21:53:56,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:53:56,386 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 21:53:56,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 21:53:56,386 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 21:53:56,386 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 21:53:56,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 21:53:56,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 21:53:56,968 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 21:53:56,968 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 21:53:56,968 INFO L264 CegarLoopResult]: At program point gcdFINAL(lines 15 26) the Hoare annotation is: (let ((.cse0 (= gcd_~y2 |gcd_#in~y2|)) (.cse1 (= gcd_~y1 |gcd_#in~y1|))) (or (and (or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0)) .cse0 .cse1) (and (<= 1 |gcd_#res|) .cse0 .cse1))) [2020-08-22 21:53:56,969 INFO L264 CegarLoopResult]: At program point gcdEXIT(lines 15 26) the Hoare annotation is: (let ((.cse0 (= gcd_~y2 |gcd_#in~y2|)) (.cse1 (= gcd_~y1 |gcd_#in~y1|))) (or (and (or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0)) .cse0 .cse1) (and (<= 1 |gcd_#res|) .cse0 .cse1))) [2020-08-22 21:53:56,969 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-08-22 21:53:56,969 INFO L264 CegarLoopResult]: At program point L25-1(line 25) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (<= 1 |gcd_#t~ret1|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-08-22 21:53:56,969 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-08-22 21:53:56,969 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-08-22 21:53:56,970 INFO L264 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (<= 1 |gcd_#t~ret1|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-08-22 21:53:56,970 INFO L264 CegarLoopResult]: At program point L22(lines 22 24) the Hoare annotation is: (and (not (= gcd_~y1 gcd_~y2)) (<= 1 gcd_~y2) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-08-22 21:53:56,970 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 |gcd_#t~ret0|)) [2020-08-22 21:53:56,970 INFO L264 CegarLoopResult]: At program point L25-3(line 25) the Hoare annotation is: (and (<= 1 |gcd_#res|) (= gcd_~y2 |gcd_#in~y2|) (<= 1 |gcd_#t~ret1|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-08-22 21:53:56,970 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 |gcd_#t~ret0|)) [2020-08-22 21:53:56,971 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= 1 gcd_~y2) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-08-22 21:53:56,971 INFO L264 CegarLoopResult]: At program point L23-3(line 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= 1 |gcd_#res|) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 |gcd_#t~ret0|)) [2020-08-22 21:53:56,971 INFO L264 CegarLoopResult]: At program point L19(lines 19 21) the Hoare annotation is: (and (<= 1 gcd_~y2) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-08-22 21:53:56,971 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (and (or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0)) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-08-22 21:53:56,971 INFO L264 CegarLoopResult]: At program point L16(lines 16 18) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-08-22 21:53:56,972 INFO L264 CegarLoopResult]: At program point L15(lines 15 26) the Hoare annotation is: (= gcd_~y1 |gcd_#in~y1|) [2020-08-22 21:53:56,972 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 21:53:56,972 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 21:53:56,972 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 21:53:56,972 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 21:53:56,972 INFO L264 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: (<= 1 main_~m~0) [2020-08-22 21:53:56,973 INFO L264 CegarLoopResult]: At program point L33-1(line 33) the Hoare annotation is: (<= 1 main_~m~0) [2020-08-22 21:53:56,973 INFO L271 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: true [2020-08-22 21:53:56,973 INFO L264 CegarLoopResult]: At program point L33-2(line 33) the Hoare annotation is: (<= 1 main_~m~0) [2020-08-22 21:53:56,973 INFO L271 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: true [2020-08-22 21:53:56,973 INFO L271 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: true [2020-08-22 21:53:56,973 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 28 43) the Hoare annotation is: true [2020-08-22 21:53:56,973 INFO L264 CegarLoopResult]: At program point L38(lines 38 42) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~z~0) (<= 1 main_~m~0)) [2020-08-22 21:53:56,974 INFO L271 CegarLoopResult]: At program point L38-1(lines 28 43) the Hoare annotation is: true [2020-08-22 21:53:56,974 INFO L264 CegarLoopResult]: At program point L34(lines 34 36) the Hoare annotation is: (<= 1 main_~m~0) [2020-08-22 21:53:56,974 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) the Hoare annotation is: false [2020-08-22 21:53:56,974 INFO L271 CegarLoopResult]: At program point L30(lines 30 32) the Hoare annotation is: true [2020-08-22 21:53:56,974 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-08-22 21:53:56,975 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2020-08-22 21:53:56,975 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: false [2020-08-22 21:53:56,975 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2020-08-22 21:53:56,975 INFO L264 CegarLoopResult]: At program point L37-1(line 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0) (<= 1 |main_#t~ret4|)) [2020-08-22 21:53:56,975 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (<= 1 main_~m~0) [2020-08-22 21:53:56,976 INFO L264 CegarLoopResult]: At program point L37-2(line 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0) (<= 1 |main_#t~ret4|)) [2020-08-22 21:53:56,976 INFO L264 CegarLoopResult]: At program point L37-3(line 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~z~0) (<= 1 main_~m~0) (<= 1 |main_#t~ret4|)) [2020-08-22 21:53:56,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 09:53:56 BoogieIcfgContainer [2020-08-22 21:53:56,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 21:53:57,002 INFO L168 Benchmark]: Toolchain (without parser) took 3560.08 ms. Allocated memory was 138.9 MB in the beginning and 246.4 MB in the end (delta: 107.5 MB). Free memory was 102.8 MB in the beginning and 123.0 MB in the end (delta: -20.1 MB). Peak memory consumption was 87.3 MB. Max. memory is 7.1 GB. [2020-08-22 21:53:57,003 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 21:53:57,004 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.02 ms. Allocated memory is still 138.9 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 21:53:57,006 INFO L168 Benchmark]: Boogie Preprocessor took 110.26 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 180.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-08-22 21:53:57,006 INFO L168 Benchmark]: RCFGBuilder took 313.12 ms. Allocated memory is still 202.4 MB. Free memory was 180.1 MB in the beginning and 166.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-08-22 21:53:57,007 INFO L168 Benchmark]: TraceAbstraction took 2853.05 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 165.6 MB in the beginning and 123.0 MB in the end (delta: 42.6 MB). Peak memory consumption was 86.6 MB. Max. memory is 7.1 GB. [2020-08-22 21:53:57,011 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 278.02 ms. Allocated memory is still 138.9 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.26 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 180.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.12 ms. Allocated memory is still 202.4 MB. Free memory was 180.1 MB in the beginning and 166.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2853.05 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 165.6 MB in the beginning and 123.0 MB in the end (delta: 42.6 MB). Peak memory consumption was 86.6 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 - ProcedureContractResult [Line: 15]: Procedure Contract for gcd Derived contract for procedure gcd: (((\old(y2) <= 0 || \old(y1) <= 0) && y2 == \old(y2)) && y1 == \old(y1)) || ((1 <= \result && y2 == \old(y2)) && y1 == \old(y1)) - ProcedureContractResult [Line: 28]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 227 SDtfs, 215 SDslu, 754 SDs, 0 SdLazy, 352 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred 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, 43 LocationsWithAnnotation, 77 PreInvPairs, 139 NumberOfFragments, 341 HoareAnnotationTreeSize, 77 FomulaSimplifications, 1544 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 43 FomulaSimplificationsInter, 394 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 238 NumberOfCodeBlocks, 238 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 231 ConstructedInterpolants, 0 QuantifiedInterpolants, 15935 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 41/41 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...