/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-simple/id2_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:34:53,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:34:53,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:34:53,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:34:53,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:34:53,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:34:53,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:34:53,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:34:53,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:34:53,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:34:53,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:34:53,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:34:53,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:34:53,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:34:53,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:34:53,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:34:53,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:34:53,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:34:53,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:34:53,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:34:53,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:34:53,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:34:53,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:34:53,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:34:53,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:34:53,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:34:53,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:34:53,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:34:53,376 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:34:53,407 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:34:53,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:34:53,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:34:53,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:34:53,415 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:34:53,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:34:53,416 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:34:53,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:34:53,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:34:53,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:34:53,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:34:53,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:34:53,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:34:53,417 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:34:53,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:34:53,418 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:34:53,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:34:53,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:34:53,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:34:53,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:34:53,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:34:53,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:34:53,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:34:53,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:34:53,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:34:53,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:34:53,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:34:53,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:34:53,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:34:53,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:34:53,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:34:53,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:34:53,813 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:34:53,816 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:34:53,817 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:34:53,818 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2020-08-22 16:34:53,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe85da0f1/608873cc9c2f43069ab2320ed6ee6e52/FLAG10087ebdc [2020-08-22 16:34:54,417 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:34:54,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2020-08-22 16:34:54,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe85da0f1/608873cc9c2f43069ab2320ed6ee6e52/FLAG10087ebdc [2020-08-22 16:34:54,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe85da0f1/608873cc9c2f43069ab2320ed6ee6e52 [2020-08-22 16:34:54,806 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:34:54,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:34:54,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:34:54,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:34:54,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:34:54,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:34:54" (1/1) ... [2020-08-22 16:34:54,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3095121f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:54, skipping insertion in model container [2020-08-22 16:34:54,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:34:54" (1/1) ... [2020-08-22 16:34:54,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:34:54,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:34:55,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:34:55,053 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:34:55,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:34:55,089 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:34:55,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:55 WrapperNode [2020-08-22 16:34:55,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:34:55,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:34:55,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:34:55,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:34:55,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:55" (1/1) ... [2020-08-22 16:34:55,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:55" (1/1) ... [2020-08-22 16:34:55,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:55" (1/1) ... [2020-08-22 16:34:55,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:55" (1/1) ... [2020-08-22 16:34:55,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:55" (1/1) ... [2020-08-22 16:34:55,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:55" (1/1) ... [2020-08-22 16:34:55,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:55" (1/1) ... [2020-08-22 16:34:55,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:34:55,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:34:55,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:34:55,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:34:55,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:34:55,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:34:55,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:34:55,332 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 16:34:55,333 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-22 16:34:55,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:34:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:34:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:34:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 16:34:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-22 16:34:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:34:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:34:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:34:55,538 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:34:55,539 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:34:55,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:34:55 BoogieIcfgContainer [2020-08-22 16:34:55,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:34:55,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:34:55,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:34:55,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:34:55,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:34:54" (1/3) ... [2020-08-22 16:34:55,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fcf649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:34:55, skipping insertion in model container [2020-08-22 16:34:55,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:55" (2/3) ... [2020-08-22 16:34:55,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fcf649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:34:55, skipping insertion in model container [2020-08-22 16:34:55,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:34:55" (3/3) ... [2020-08-22 16:34:55,555 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2020-08-22 16:34:55,567 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:34:55,576 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:34:55,592 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:34:55,622 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:34:55,622 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:34:55,622 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:34:55,623 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:34:55,624 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:34:55,624 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:34:55,624 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:34:55,624 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:34:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-22 16:34:55,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:34:55,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:34:55,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:34:55,656 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:34:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:34:55,663 INFO L82 PathProgramCache]: Analyzing trace with hash -550894517, now seen corresponding path program 1 times [2020-08-22 16:34:55,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:34:55,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607741887] [2020-08-22 16:34:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:34:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:55,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:34:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:55,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:34:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:34:55,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607741887] [2020-08-22 16:34:55,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:34:55,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:34:55,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773425838] [2020-08-22 16:34:55,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:34:55,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:34:55,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:34:55,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:34:55,972 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-08-22 16:34:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:34:56,219 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-22 16:34:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:34:56,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 16:34:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:34:56,239 INFO L225 Difference]: With dead ends: 36 [2020-08-22 16:34:56,240 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 16:34:56,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:34:56,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 16:34:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 16:34:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 16:34:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-22 16:34:56,321 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2020-08-22 16:34:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:34:56,323 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-22 16:34:56,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:34:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-22 16:34:56,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:34:56,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:34:56,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:34:56,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:34:56,328 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:34:56,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:34:56,329 INFO L82 PathProgramCache]: Analyzing trace with hash 40504409, now seen corresponding path program 1 times [2020-08-22 16:34:56,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:34:56,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106923773] [2020-08-22 16:34:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:34:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:56,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:34:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:56,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:34:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:56,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:34:56,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106923773] [2020-08-22 16:34:56,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:34:56,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 16:34:56,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210420075] [2020-08-22 16:34:56,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:34:56,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:34:56,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:34:56,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:34:56,483 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-22 16:34:56,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:34:56,572 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-08-22 16:34:56,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:34:56,573 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-22 16:34:56,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:34:56,575 INFO L225 Difference]: With dead ends: 33 [2020-08-22 16:34:56,575 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 16:34:56,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:34:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 16:34:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-22 16:34:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 16:34:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-22 16:34:56,585 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-08-22 16:34:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:34:56,586 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-22 16:34:56,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:34:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-22 16:34:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:34:56,588 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:34:56,588 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, 1, 1] [2020-08-22 16:34:56,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:34:56,589 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:34:56,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:34:56,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1029702107, now seen corresponding path program 1 times [2020-08-22 16:34:56,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:34:56,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542923419] [2020-08-22 16:34:56,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:34:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:56,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:34:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:56,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:34:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:56,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:56,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:34:56,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542923419] [2020-08-22 16:34:56,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260296358] [2020-08-22 16:34:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:34:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:56,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:34:56,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:34:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:34:57,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:34:57,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-08-22 16:34:57,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866649504] [2020-08-22 16:34:57,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 16:34:57,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:34:57,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 16:34:57,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:34:57,020 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 11 states. [2020-08-22 16:34:57,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:34:57,168 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-08-22 16:34:57,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:34:57,169 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-08-22 16:34:57,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:34:57,171 INFO L225 Difference]: With dead ends: 39 [2020-08-22 16:34:57,171 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 16:34:57,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:34:57,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 16:34:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-08-22 16:34:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 16:34:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-22 16:34:57,182 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-08-22 16:34:57,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:34:57,182 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-22 16:34:57,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 16:34:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-22 16:34:57,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 16:34:57,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:34:57,185 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:34:57,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-08-22 16:34:57,401 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:34:57,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:34:57,402 INFO L82 PathProgramCache]: Analyzing trace with hash -559715991, now seen corresponding path program 1 times [2020-08-22 16:34:57,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:34:57,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197022413] [2020-08-22 16:34:57,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:34:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:57,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:34:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:57,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:34:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:57,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:57,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:57,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 16:34:57,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197022413] [2020-08-22 16:34:57,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239750548] [2020-08-22 16:34:57,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:34:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:57,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2020-08-22 16:34:57,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:34:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 16:34:57,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:34:57,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-08-22 16:34:57,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097302506] [2020-08-22 16:34:57,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:34:57,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:34:57,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:34:57,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:34:57,782 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2020-08-22 16:34:57,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:34:57,886 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-08-22 16:34:57,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:34:57,887 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-08-22 16:34:57,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:34:57,888 INFO L225 Difference]: With dead ends: 45 [2020-08-22 16:34:57,888 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 16:34:57,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:34:57,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 16:34:57,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-08-22 16:34:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 16:34:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-22 16:34:57,896 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 31 [2020-08-22 16:34:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:34:57,897 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-22 16:34:57,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:34:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-22 16:34:57,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 16:34:57,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:34:57,899 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:34:58,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:34:58,115 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:34:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:34:58,116 INFO L82 PathProgramCache]: Analyzing trace with hash 2003326827, now seen corresponding path program 2 times [2020-08-22 16:34:58,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:34:58,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672059308] [2020-08-22 16:34:58,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:34:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:34:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:34:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-22 16:34:58,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672059308] [2020-08-22 16:34:58,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732869943] [2020-08-22 16:34:58,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:34:58,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:34:58,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:34:58,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2020-08-22 16:34:58,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:34:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-22 16:34:58,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:34:58,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-08-22 16:34:58,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165045982] [2020-08-22 16:34:58,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:34:58,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:34:58,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:34:58,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:34:58,447 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 13 states. [2020-08-22 16:34:58,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:34:58,585 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-08-22 16:34:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:34:58,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-22 16:34:58,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:34:58,588 INFO L225 Difference]: With dead ends: 51 [2020-08-22 16:34:58,588 INFO L226 Difference]: Without dead ends: 47 [2020-08-22 16:34:58,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:34:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-22 16:34:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-08-22 16:34:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 16:34:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-22 16:34:58,598 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 37 [2020-08-22 16:34:58,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:34:58,599 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-22 16:34:58,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:34:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-22 16:34:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 16:34:58,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:34:58,601 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:34:58,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:34:58,815 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:34:58,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:34:58,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1197899385, now seen corresponding path program 2 times [2020-08-22 16:34:58,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:34:58,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49768182] [2020-08-22 16:34:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:34:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:34:58,830 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:34:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:34:58,843 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:34:58,861 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:34:58,861 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:34:58,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 16:34:58,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:34:58 BoogieIcfgContainer [2020-08-22 16:34:58,894 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:34:58,897 INFO L168 Benchmark]: Toolchain (without parser) took 4088.11 ms. Allocated memory was 138.9 MB in the beginning and 234.4 MB in the end (delta: 95.4 MB). Free memory was 102.6 MB in the beginning and 88.2 MB in the end (delta: 14.4 MB). Peak memory consumption was 109.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:34:58,898 INFO L168 Benchmark]: CDTParser took 1.59 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-22 16:34:58,899 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.87 ms. Allocated memory is still 138.9 MB. Free memory was 102.2 MB in the beginning and 92.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-22 16:34:58,900 INFO L168 Benchmark]: Boogie Preprocessor took 147.69 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 92.5 MB in the beginning and 181.2 MB in the end (delta: -88.7 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:34:58,901 INFO L168 Benchmark]: RCFGBuilder took 304.09 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 169.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:34:58,902 INFO L168 Benchmark]: TraceAbstraction took 3348.39 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 168.1 MB in the beginning and 88.2 MB in the end (delta: 79.9 MB). Peak memory consumption was 111.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:34:58,905 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.59 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.87 ms. Allocated memory is still 138.9 MB. Free memory was 102.2 MB in the beginning and 92.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.69 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 92.5 MB in the beginning and 181.2 MB in the end (delta: -88.7 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 304.09 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 169.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3348.39 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 168.1 MB in the beginning and 88.2 MB in the end (delta: 79.9 MB). Peak memory consumption was 111.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 21]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int input = 5; VAL [input=5] [L19] CALL, EXPR id(input) VAL [\old(x)=5] [L8] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=4] [L13] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L14] CALL, EXPR id(x-1) VAL [\old(x)=3] [L8] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=2] [L13] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L14] CALL, EXPR id(x-1) VAL [\old(x)=1] [L8] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=0] [L13] COND TRUE x==0 [L13] return 0; VAL [\old(x)=0, \result=0, x=0] [L9] RET, EXPR id2(x-1) VAL [\old(x)=1, id2(x-1)=0, x=1] [L9] return id2(x-1) + 1; [L14] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L14] return id(x-1) + 1; [L9] RET, EXPR id2(x-1) VAL [\old(x)=3, id2(x-1)=2, x=3] [L9] return id2(x-1) + 1; [L14] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L14] return id(x-1) + 1; [L9] RET, EXPR id2(x-1) VAL [\old(x)=5, id2(x-1)=4, x=5] [L9] return id2(x-1) + 1; [L19] RET, EXPR id(input) VAL [id(input)=5, input=5] [L19] int result = id(input); [L20] COND TRUE result == 5 VAL [input=5, result=5] [L21] __VERIFIER_error() VAL [input=5, result=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.2s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 92 SDtfs, 93 SDslu, 426 SDs, 0 SdLazy, 235 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=5, 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, 5 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 261 NumberOfCodeBlocks, 261 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 210 ConstructedInterpolants, 0 QuantifiedInterpolants, 13512 SizeOfPredicates, 15 NumberOfNonLiveVariables, 222 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 34/68 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 incorrect! Received shutdown request...