/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/sum_10x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:00:15,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:00:15,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:00:15,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:00:15,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:00:15,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:00:15,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:00:15,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:00:15,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:00:15,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:00:15,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:00:15,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:00:15,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:00:15,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:00:15,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:00:15,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:00:15,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:00:15,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:00:15,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:00:15,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:00:15,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:00:15,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:00:15,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:00:15,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:00:15,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:00:15,452 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 12:00:15,467 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:00:15,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:00:15,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:00:15,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:00:15,469 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:00:15,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:00:15,470 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:00:15,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:00:15,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:00:15,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:00:15,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:00:15,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:00:15,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:00:15,471 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:00:15,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:00:15,471 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:00:15,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:00:15,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:00:15,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:00:15,472 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:00:15,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:00:15,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:00:15,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:00:15,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:00:15,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:00:15,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:00:15,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:00:15,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:00:15,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:00:15,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:00:15,756 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:00:15,775 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:00:15,779 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:00:15,780 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:00:15,781 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:00:15,782 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-17 12:00:15,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e59f6b7ad/177e4a6c1bbe44e584ce694ef79d716e/FLAGf63cd6261 [2020-07-17 12:00:16,344 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:00:16,344 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-17 12:00:16,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e59f6b7ad/177e4a6c1bbe44e584ce694ef79d716e/FLAGf63cd6261 [2020-07-17 12:00:16,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e59f6b7ad/177e4a6c1bbe44e584ce694ef79d716e [2020-07-17 12:00:16,731 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:00:16,733 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:00:16,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:00:16,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:00:16,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:00:16,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:00:16" (1/1) ... [2020-07-17 12:00:16,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad95b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:16, skipping insertion in model container [2020-07-17 12:00:16,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:00:16" (1/1) ... [2020-07-17 12:00:16,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:00:16,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:00:16,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:00:16,989 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:00:17,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:00:17,022 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:00:17,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:17 WrapperNode [2020-07-17 12:00:17,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:00:17,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:00:17,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:00:17,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:00:17,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:17" (1/1) ... [2020-07-17 12:00:17,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:17" (1/1) ... [2020-07-17 12:00:17,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:17" (1/1) ... [2020-07-17 12:00:17,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:17" (1/1) ... [2020-07-17 12:00:17,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:17" (1/1) ... [2020-07-17 12:00:17,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:17" (1/1) ... [2020-07-17 12:00:17,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:17" (1/1) ... [2020-07-17 12:00:17,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:00:17,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:00:17,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:00:17,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:00:17,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:00:17,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:00:17,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:00:17,190 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-17 12:00:17,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:00:17,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:00:17,190 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-17 12:00:17,190 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:00:17,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:00:17,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:00:17,356 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:00:17,357 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 12:00:17,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:00:17 BoogieIcfgContainer [2020-07-17 12:00:17,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:00:17,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:00:17,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:00:17,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:00:17,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:00:16" (1/3) ... [2020-07-17 12:00:17,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab7dd24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:00:17, skipping insertion in model container [2020-07-17 12:00:17,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:00:17" (2/3) ... [2020-07-17 12:00:17,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab7dd24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:00:17, skipping insertion in model container [2020-07-17 12:00:17,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:00:17" (3/3) ... [2020-07-17 12:00:17,368 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-07-17 12:00:17,377 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:00:17,384 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:00:17,397 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:00:17,423 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:00:17,423 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:00:17,423 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:00:17,424 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:00:17,424 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:00:17,424 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:00:17,424 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:00:17,424 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:00:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-17 12:00:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-17 12:00:17,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:17,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:17,449 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:17,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:17,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-17 12:00:17,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:17,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124651228] [2020-07-17 12:00:17,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:00:17,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124651228] [2020-07-17 12:00:17,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:00:17,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:00:17,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238378511] [2020-07-17 12:00:17,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:00:17,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:17,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:00:17,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:00:17,710 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-17 12:00:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:17,864 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-17 12:00:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:00:17,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-17 12:00:17,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:17,883 INFO L225 Difference]: With dead ends: 30 [2020-07-17 12:00:17,883 INFO L226 Difference]: Without dead ends: 18 [2020-07-17 12:00:17,890 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 [2020-07-17 12:00:17,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-17 12:00:17,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-17 12:00:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-17 12:00:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-17 12:00:17,934 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-17 12:00:17,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:17,935 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-17 12:00:17,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:00:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-17 12:00:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-17 12:00:17,938 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:17,938 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:17,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:00:17,939 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:17,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:17,940 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-17 12:00:17,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:17,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180499837] [2020-07-17 12:00:17,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 12:00:18,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180499837] [2020-07-17 12:00:18,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62932554] [2020-07-17 12:00:18,097 INFO L94 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 [2020-07-17 12:00:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:18,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:00:18,150 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 12:00:18,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:18,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-17 12:00:18,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022672656] [2020-07-17 12:00:18,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 12:00:18,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:18,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 12:00:18,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:00:18,240 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-17 12:00:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:18,322 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-17 12:00:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:00:18,323 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-17 12:00:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:18,324 INFO L225 Difference]: With dead ends: 25 [2020-07-17 12:00:18,324 INFO L226 Difference]: Without dead ends: 21 [2020-07-17 12:00:18,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:00:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-17 12:00:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-17 12:00:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-17 12:00:18,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-17 12:00:18,333 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-17 12:00:18,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:18,334 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-17 12:00:18,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 12:00:18,334 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-17 12:00:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 12:00:18,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:18,335 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:18,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-17 12:00:18,548 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:18,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:18,549 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-17 12:00:18,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:18,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214999734] [2020-07-17 12:00:18,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 12:00:18,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214999734] [2020-07-17 12:00:18,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516251896] [2020-07-17 12:00:18,757 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-07-17 12:00:18,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:00:18,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:18,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 12:00:18,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 12:00:18,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:18,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-17 12:00:18,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049723679] [2020-07-17 12:00:18,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 12:00:18,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:18,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 12:00:18,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:00:18,839 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-17 12:00:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:18,927 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-17 12:00:18,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:00:18,928 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-17 12:00:18,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:18,929 INFO L225 Difference]: With dead ends: 28 [2020-07-17 12:00:18,929 INFO L226 Difference]: Without dead ends: 24 [2020-07-17 12:00:18,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:00:18,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-17 12:00:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-17 12:00:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-17 12:00:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-17 12:00:18,938 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-17 12:00:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:18,939 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-17 12:00:18,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 12:00:18,939 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-17 12:00:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 12:00:18,941 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:18,941 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:19,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:19,158 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:19,159 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-17 12:00:19,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:19,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40113566] [2020-07-17 12:00:19,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-17 12:00:19,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40113566] [2020-07-17 12:00:19,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228312561] [2020-07-17 12:00:19,367 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-07-17 12:00:19,404 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-17 12:00:19,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:19,405 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-17 12:00:19,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-17 12:00:19,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:19,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-17 12:00:19,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427261020] [2020-07-17 12:00:19,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 12:00:19,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:19,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 12:00:19,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:00:19,438 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-17 12:00:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:19,522 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-17 12:00:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:00:19,523 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-17 12:00:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:19,524 INFO L225 Difference]: With dead ends: 31 [2020-07-17 12:00:19,525 INFO L226 Difference]: Without dead ends: 27 [2020-07-17 12:00:19,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-17 12:00:19,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-17 12:00:19,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-17 12:00:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 12:00:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-17 12:00:19,532 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-17 12:00:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:19,533 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-17 12:00:19,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 12:00:19,533 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-17 12:00:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-17 12:00:19,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:19,535 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:19,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:19,749 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:19,750 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-17 12:00:19,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:19,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383120152] [2020-07-17 12:00:19,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 12:00:19,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383120152] [2020-07-17 12:00:19,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714265621] [2020-07-17 12:00:19,995 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:20,030 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:00:20,030 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:20,031 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-17 12:00:20,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 12:00:20,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:20,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-17 12:00:20,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544350393] [2020-07-17 12:00:20,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 12:00:20,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:20,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 12:00:20,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:00:20,066 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-17 12:00:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:20,161 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-17 12:00:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 12:00:20,162 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-17 12:00:20,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:20,163 INFO L225 Difference]: With dead ends: 34 [2020-07-17 12:00:20,164 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 12:00:20,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-17 12:00:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 12:00:20,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-17 12:00:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 12:00:20,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-17 12:00:20,171 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-17 12:00:20,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:20,171 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-17 12:00:20,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 12:00:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-17 12:00:20,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-17 12:00:20,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:20,173 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:20,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:20,387 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:20,388 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-17 12:00:20,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:20,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44555620] [2020-07-17 12:00:20,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 12:00:20,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44555620] [2020-07-17 12:00:20,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369590593] [2020-07-17 12:00:20,589 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:20,631 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-17 12:00:20,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:20,632 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-17 12:00:20,636 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 12:00:20,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:20,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-17 12:00:20,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607387675] [2020-07-17 12:00:20,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 12:00:20,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:20,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 12:00:20,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:00:20,676 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-17 12:00:20,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:20,807 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-17 12:00:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:00:20,808 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-17 12:00:20,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:20,810 INFO L225 Difference]: With dead ends: 37 [2020-07-17 12:00:20,810 INFO L226 Difference]: Without dead ends: 33 [2020-07-17 12:00:20,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-07-17 12:00:20,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-17 12:00:20,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-17 12:00:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 12:00:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-17 12:00:20,818 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-17 12:00:20,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:20,819 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-17 12:00:20,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 12:00:20,819 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-17 12:00:20,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-17 12:00:20,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:20,821 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:21,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-17 12:00:21,037 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:21,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-17 12:00:21,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:21,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575614576] [2020-07-17 12:00:21,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-17 12:00:21,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575614576] [2020-07-17 12:00:21,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314960777] [2020-07-17 12:00:21,312 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:21,374 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-17 12:00:21,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:21,376 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-17 12:00:21,387 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-17 12:00:21,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:21,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-17 12:00:21,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020049542] [2020-07-17 12:00:21,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 12:00:21,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:21,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 12:00:21,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-17 12:00:21,421 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-17 12:00:21,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:21,534 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-17 12:00:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 12:00:21,535 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-17 12:00:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:21,537 INFO L225 Difference]: With dead ends: 40 [2020-07-17 12:00:21,537 INFO L226 Difference]: Without dead ends: 36 [2020-07-17 12:00:21,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-17 12:00:21,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-17 12:00:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-17 12:00:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-17 12:00:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-17 12:00:21,544 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-17 12:00:21,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:21,545 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-17 12:00:21,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 12:00:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-17 12:00:21,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-17 12:00:21,546 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:21,547 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:21,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:21,760 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:21,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-17 12:00:21,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:21,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006698052] [2020-07-17 12:00:21,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-17 12:00:22,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006698052] [2020-07-17 12:00:22,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36314899] [2020-07-17 12:00:22,050 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,094 INFO L264 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-17 12:00:22,097 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-17 12:00:22,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:22,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-17 12:00:22,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51620784] [2020-07-17 12:00:22,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 12:00:22,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:22,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 12:00:22,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-17 12:00:22,143 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-17 12:00:22,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:22,281 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-17 12:00:22,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 12:00:22,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-17 12:00:22,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:22,283 INFO L225 Difference]: With dead ends: 43 [2020-07-17 12:00:22,283 INFO L226 Difference]: Without dead ends: 39 [2020-07-17 12:00:22,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-07-17 12:00:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-17 12:00:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-17 12:00:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-17 12:00:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-17 12:00:22,291 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-17 12:00:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:22,291 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-17 12:00:22,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 12:00:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-17 12:00:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-17 12:00:22,293 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:22,293 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:22,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:22,508 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:22,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:22,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-17 12:00:22,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:22,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201522970] [2020-07-17 12:00:22,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-17 12:00:22,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201522970] [2020-07-17 12:00:22,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319312079] [2020-07-17 12:00:22,787 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:22,831 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:00:22,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:22,833 INFO L264 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-17 12:00:22,844 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-17 12:00:22,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:22,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-17 12:00:22,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497906878] [2020-07-17 12:00:22,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 12:00:22,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:22,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 12:00:22,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-17 12:00:22,901 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-17 12:00:23,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:23,066 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-17 12:00:23,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 12:00:23,067 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-17 12:00:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:23,069 INFO L225 Difference]: With dead ends: 46 [2020-07-17 12:00:23,069 INFO L226 Difference]: Without dead ends: 42 [2020-07-17 12:00:23,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-07-17 12:00:23,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-17 12:00:23,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-17 12:00:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 12:00:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-17 12:00:23,078 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-17 12:00:23,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:23,078 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-17 12:00:23,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 12:00:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-17 12:00:23,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-17 12:00:23,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:23,080 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:23,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-17 12:00:23,296 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:23,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:23,297 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-17 12:00:23,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:23,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085708990] [2020-07-17 12:00:23,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-17 12:00:23,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085708990] [2020-07-17 12:00:23,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358789487] [2020-07-17 12:00:23,677 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:23,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-17 12:00:23,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:23,737 INFO L264 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-17 12:00:23,748 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-17 12:00:23,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:23,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-17 12:00:23,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913936625] [2020-07-17 12:00:23,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 12:00:23,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:23,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 12:00:23,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-17 12:00:23,820 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-17 12:00:23,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:23,987 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-17 12:00:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 12:00:23,988 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-17 12:00:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:23,990 INFO L225 Difference]: With dead ends: 49 [2020-07-17 12:00:23,990 INFO L226 Difference]: Without dead ends: 45 [2020-07-17 12:00:23,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-07-17 12:00:23,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-17 12:00:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-17 12:00:24,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 12:00:24,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-17 12:00:24,007 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-17 12:00:24,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:24,008 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-17 12:00:24,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 12:00:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-17 12:00:24,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-17 12:00:24,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:00:24,017 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:00:24,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:24,232 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:00:24,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:00:24,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-17 12:00:24,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:00:24,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084000970] [2020-07-17 12:00:24,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:00:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:00:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 144 proven. 20 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-07-17 12:00:25,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084000970] [2020-07-17 12:00:25,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129771527] [2020-07-17 12:00:25,276 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:25,362 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:00:25,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:00:25,366 INFO L264 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-17 12:00:25,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:00:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 19 proven. 155 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-07-17 12:00:26,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:00:26,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 54 [2020-07-17 12:00:26,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167586666] [2020-07-17 12:00:26,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-17 12:00:26,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:00:26,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-17 12:00:26,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2652, Unknown=0, NotChecked=0, Total=2862 [2020-07-17 12:00:26,574 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 54 states. [2020-07-17 12:00:28,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:00:28,602 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-07-17 12:00:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-17 12:00:28,603 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 73 [2020-07-17 12:00:28,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:00:28,604 INFO L225 Difference]: With dead ends: 48 [2020-07-17 12:00:28,604 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 12:00:28,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=522, Invalid=5330, Unknown=0, NotChecked=0, Total=5852 [2020-07-17 12:00:28,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 12:00:28,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 12:00:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 12:00:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 12:00:28,611 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2020-07-17 12:00:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:00:28,611 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 12:00:28,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-17 12:00:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 12:00:28,612 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 12:00:28,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:00:28,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 12:00:28,860 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 12:00:28,860 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:00:28,860 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:00:28,860 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 12:00:28,860 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 12:00:28,861 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:00:28,861 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-17 12:00:28,861 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (<= 1 sum_~n)) [2020-07-17 12:00:28,861 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-17 12:00:28,861 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-17 12:00:28,861 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-17 12:00:28,861 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-17 12:00:28,862 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-17 12:00:28,862 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-17 12:00:28,862 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-17 12:00:28,862 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-17 12:00:28,862 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-17 12:00:28,863 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= 10 main_~a~0) [2020-07-17 12:00:28,863 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-17 12:00:28,863 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-17 12:00:28,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:00:28 BoogieIcfgContainer [2020-07-17 12:00:28,869 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:00:28,871 INFO L168 Benchmark]: Toolchain (without parser) took 12138.44 ms. Allocated memory was 137.4 MB in the beginning and 340.3 MB in the end (delta: 202.9 MB). Free memory was 100.7 MB in the beginning and 251.7 MB in the end (delta: -150.9 MB). Peak memory consumption was 52.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:28,872 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 137.4 MB. Free memory is still 119.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 12:00:28,872 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.08 ms. Allocated memory is still 137.4 MB. Free memory was 100.3 MB in the beginning and 91.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:28,873 INFO L168 Benchmark]: Boogie Preprocessor took 23.92 ms. Allocated memory is still 137.4 MB. Free memory was 91.1 MB in the beginning and 89.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:28,874 INFO L168 Benchmark]: RCFGBuilder took 312.52 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 89.7 MB in the beginning and 169.8 MB in the end (delta: -80.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:28,874 INFO L168 Benchmark]: TraceAbstraction took 11507.23 ms. Allocated memory was 200.8 MB in the beginning and 340.3 MB in the end (delta: 139.5 MB). Free memory was 169.1 MB in the beginning and 251.7 MB in the end (delta: -82.5 MB). Peak memory consumption was 56.9 MB. Max. memory is 7.1 GB. [2020-07-17 12:00:28,877 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 137.4 MB. Free memory is still 119.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.08 ms. Allocated memory is still 137.4 MB. Free memory was 100.3 MB in the beginning and 91.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.92 ms. Allocated memory is still 137.4 MB. Free memory was 91.1 MB in the beginning and 89.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.52 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 89.7 MB in the beginning and 169.8 MB in the end (delta: -80.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11507.23 ms. Allocated memory was 200.8 MB in the beginning and 340.3 MB in the end (delta: 139.5 MB). Free memory was 169.1 MB in the beginning and 251.7 MB in the end (delta: -82.5 MB). Peak memory consumption was 56.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.4s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 296 SDslu, 980 SDs, 0 SdLazy, 1259 SolverSat, 155 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 794 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, 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, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 18 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 933 NumberOfCodeBlocks, 928 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 912 ConstructedInterpolants, 0 QuantifiedInterpolants, 159720 SizeOfPredicates, 79 NumberOfNonLiveVariables, 1330 ConjunctsInSsa, 223 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 1345/2420 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...