/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/loop-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:22:50,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:22:50,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:22:50,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:22:50,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:22:50,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:22:50,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:22:50,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:22:50,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:22:50,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:22:50,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:22:50,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:22:50,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:22:50,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:22:50,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:22:50,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:22:50,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:22:50,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:22:50,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:22:50,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:22:50,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:22:50,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:22:50,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:22:50,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:22:50,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:22:50,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:22:50,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:22:50,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:22:50,840 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 [2019-11-06 21:22:50,853 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:22:50,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:22:50,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:22:50,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:22:50,855 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:22:50,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:22:50,855 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:22:50,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:22:50,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:22:50,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:22:50,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:22:50,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:22:50,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:22:50,857 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:22:50,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:22:50,857 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:22:50,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:22:50,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:22:50,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:22:50,858 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:22:50,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:22:50,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:22:50,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:22:50,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:22:50,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:22:50,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:22:50,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:22:50,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:22:50,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:22:51,197 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:22:51,219 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:22:51,223 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:22:51,224 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:22:51,225 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:22:51,225 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2019-11-06 21:22:51,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60e588462/82abb9f82382490686f8cf48c4c265b8/FLAGa0cfed628 [2019-11-06 21:22:51,727 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:22:51,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2019-11-06 21:22:51,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60e588462/82abb9f82382490686f8cf48c4c265b8/FLAGa0cfed628 [2019-11-06 21:22:52,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60e588462/82abb9f82382490686f8cf48c4c265b8 [2019-11-06 21:22:52,150 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:22:52,152 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:22:52,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:22:52,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:22:52,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:22:52,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:22:52" (1/1) ... [2019-11-06 21:22:52,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6588b150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:22:52, skipping insertion in model container [2019-11-06 21:22:52,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:22:52" (1/1) ... [2019-11-06 21:22:52,169 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:22:52,186 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:22:52,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:22:52,393 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:22:52,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:22:52,421 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:22:52,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:22:52 WrapperNode [2019-11-06 21:22:52,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:22:52,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:22:52,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:22:52,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:22:52,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:22:52" (1/1) ... [2019-11-06 21:22:52,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:22:52" (1/1) ... [2019-11-06 21:22:52,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:22:52" (1/1) ... [2019-11-06 21:22:52,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:22:52" (1/1) ... [2019-11-06 21:22:52,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:22:52" (1/1) ... [2019-11-06 21:22:52,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:22:52" (1/1) ... [2019-11-06 21:22:52,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:22:52" (1/1) ... [2019-11-06 21:22:52,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:22:52,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:22:52,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:22:52,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:22:52,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:22:52" (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 [2019-11-06 21:22:52,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:22:52,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:22:52,594 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:22:52,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:22:52,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:22:52,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 21:22:52,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:22:52,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:22:52,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:22:52,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:22:52,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:22:52,762 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:22:52,763 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 21:22:52,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:22:52 BoogieIcfgContainer [2019-11-06 21:22:52,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:22:52,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:22:52,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:22:52,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:22:52,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:22:52" (1/3) ... [2019-11-06 21:22:52,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f946072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:22:52, skipping insertion in model container [2019-11-06 21:22:52,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:22:52" (2/3) ... [2019-11-06 21:22:52,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f946072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:22:52, skipping insertion in model container [2019-11-06 21:22:52,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:22:52" (3/3) ... [2019-11-06 21:22:52,784 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2019-11-06 21:22:52,799 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:22:52,810 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:22:52,849 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:22:52,887 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:22:52,887 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:22:52,888 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:22:52,888 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:22:52,888 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:22:52,888 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:22:52,888 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:22:52,888 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:22:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-06 21:22:52,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:22:52,913 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:22:52,913 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:22:52,915 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:22:52,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:22:52,920 INFO L82 PathProgramCache]: Analyzing trace with hash 728031169, now seen corresponding path program 1 times [2019-11-06 21:22:52,928 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:22:52,929 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223509941] [2019-11-06 21:22:52,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:22:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:22:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:22:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:22:53,021 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223509941] [2019-11-06 21:22:53,022 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:22:53,022 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 21:22:53,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495639237] [2019-11-06 21:22:53,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 21:22:53,028 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:22:53,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 21:22:53,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:22:53,041 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-06 21:22:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:22:53,062 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-11-06 21:22:53,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 21:22:53,064 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-06 21:22:53,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:22:53,072 INFO L225 Difference]: With dead ends: 37 [2019-11-06 21:22:53,073 INFO L226 Difference]: Without dead ends: 14 [2019-11-06 21:22:53,076 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:22:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-06 21:22:53,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-06 21:22:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-06 21:22:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-06 21:22:53,112 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2019-11-06 21:22:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:22:53,112 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-06 21:22:53,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 21:22:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-06 21:22:53,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:22:53,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:22:53,114 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:22:53,114 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:22:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:22:53,115 INFO L82 PathProgramCache]: Analyzing trace with hash 701249060, now seen corresponding path program 1 times [2019-11-06 21:22:53,115 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:22:53,116 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208019100] [2019-11-06 21:22:53,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:22:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:22:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:22:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:22:53,157 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208019100] [2019-11-06 21:22:53,157 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:22:53,157 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 21:22:53,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897277256] [2019-11-06 21:22:53,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 21:22:53,160 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:22:53,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 21:22:53,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:22:53,160 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2019-11-06 21:22:53,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:22:53,181 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-11-06 21:22:53,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:22:53,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-06 21:22:53,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:22:53,182 INFO L225 Difference]: With dead ends: 20 [2019-11-06 21:22:53,182 INFO L226 Difference]: Without dead ends: 15 [2019-11-06 21:22:53,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:22:53,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-06 21:22:53,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-06 21:22:53,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-06 21:22:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-06 21:22:53,189 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2019-11-06 21:22:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:22:53,189 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-06 21:22:53,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 21:22:53,190 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-06 21:22:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 21:22:53,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:22:53,191 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:22:53,192 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:22:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:22:53,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1130211510, now seen corresponding path program 1 times [2019-11-06 21:22:53,193 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:22:53,193 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20306959] [2019-11-06 21:22:53,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:22:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:22:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:22:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:22:53,246 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20306959] [2019-11-06 21:22:53,246 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:22:53,247 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 21:22:53,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789939195] [2019-11-06 21:22:53,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 21:22:53,248 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:22:53,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 21:22:53,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:22:53,249 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2019-11-06 21:22:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:22:53,259 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2019-11-06 21:22:53,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:22:53,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-06 21:22:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:22:53,261 INFO L225 Difference]: With dead ends: 25 [2019-11-06 21:22:53,261 INFO L226 Difference]: Without dead ends: 16 [2019-11-06 21:22:53,262 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:22:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-06 21:22:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-06 21:22:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-06 21:22:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-06 21:22:53,267 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2019-11-06 21:22:53,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:22:53,267 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-06 21:22:53,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 21:22:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-06 21:22:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 21:22:53,269 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:22:53,269 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:22:53,269 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:22:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:22:53,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1842576314, now seen corresponding path program 1 times [2019-11-06 21:22:53,270 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:22:53,271 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895809306] [2019-11-06 21:22:53,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:22:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:22:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:22:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:22:53,321 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895809306] [2019-11-06 21:22:53,322 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052554689] [2019-11-06 21:22:53,322 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 [2019-11-06 21:22:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:22:53,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 21:22:53,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:22:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:22:53,397 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:22:53,397 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-11-06 21:22:53,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223415073] [2019-11-06 21:22:53,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:22:53,399 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:22:53,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:22:53,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:22:53,400 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2019-11-06 21:22:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:22:53,443 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-11-06 21:22:53,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 21:22:53,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-06 21:22:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:22:53,450 INFO L225 Difference]: With dead ends: 25 [2019-11-06 21:22:53,450 INFO L226 Difference]: Without dead ends: 20 [2019-11-06 21:22:53,451 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:22:53,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-06 21:22:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-06 21:22:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 21:22:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-06 21:22:53,460 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 15 [2019-11-06 21:22:53,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:22:53,462 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-06 21:22:53,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:22:53,462 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-06 21:22:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 21:22:53,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:22:53,465 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:22:53,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:22:53,672 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:22:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:22:53,672 INFO L82 PathProgramCache]: Analyzing trace with hash -926542376, now seen corresponding path program 2 times [2019-11-06 21:22:53,672 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:22:53,673 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624238866] [2019-11-06 21:22:53,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:22:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:22:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:22:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:22:53,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624238866] [2019-11-06 21:22:53,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795002481] [2019-11-06 21:22:53,759 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 [2019-11-06 21:22:53,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:22:53,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:22:53,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 21:22:53,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:22:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 21:22:53,837 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:22:53,837 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-06 21:22:53,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221611375] [2019-11-06 21:22:53,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:22:53,838 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:22:53,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:22:53,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:22:53,839 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 7 states. [2019-11-06 21:22:53,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:22:53,919 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-11-06 21:22:53,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 21:22:53,921 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-06 21:22:53,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:22:53,922 INFO L225 Difference]: With dead ends: 33 [2019-11-06 21:22:53,922 INFO L226 Difference]: Without dead ends: 21 [2019-11-06 21:22:53,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:22:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-06 21:22:53,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-06 21:22:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 21:22:53,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-06 21:22:53,929 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 19 [2019-11-06 21:22:53,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:22:53,929 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-06 21:22:53,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:22:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-06 21:22:53,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 21:22:53,930 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:22:53,931 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:22:54,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:22:54,135 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:22:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:22:54,136 INFO L82 PathProgramCache]: Analyzing trace with hash 901903432, now seen corresponding path program 3 times [2019-11-06 21:22:54,137 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:22:54,137 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617074734] [2019-11-06 21:22:54,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:22:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:22:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:22:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 21:22:54,210 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617074734] [2019-11-06 21:22:54,210 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:22:54,210 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 21:22:54,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384290773] [2019-11-06 21:22:54,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:22:54,211 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:22:54,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:22:54,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:22:54,212 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2019-11-06 21:22:54,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:22:54,253 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-11-06 21:22:54,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:22:54,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-06 21:22:54,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:22:54,254 INFO L225 Difference]: With dead ends: 30 [2019-11-06 21:22:54,254 INFO L226 Difference]: Without dead ends: 0 [2019-11-06 21:22:54,255 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:22:54,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-06 21:22:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-06 21:22:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-06 21:22:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-06 21:22:54,256 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2019-11-06 21:22:54,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:22:54,256 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-06 21:22:54,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:22:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-06 21:22:54,257 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-06 21:22:54,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-06 21:22:54,345 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-11-06 21:22:54,346 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-06 21:22:54,346 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-06 21:22:54,346 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-06 21:22:54,346 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-06 21:22:54,346 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-06 21:22:54,346 INFO L443 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2019-11-06 21:22:54,347 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 27) no Hoare annotation was computed. [2019-11-06 21:22:54,347 INFO L439 ceAbstractionStarter]: At program point L21-2(lines 21 23) the Hoare annotation is: (= main_~k~0 4) [2019-11-06 21:22:54,347 INFO L439 ceAbstractionStarter]: At program point L21-3(lines 15 24) the Hoare annotation is: (or (= main_~k~0 4) (and (<= (+ main_~j~0 100) main_~i~0) (<= main_~i~0 0))) [2019-11-06 21:22:54,347 INFO L439 ceAbstractionStarter]: At program point L17-2(lines 17 19) the Hoare annotation is: (or (= main_~k~0 4) (<= main_~i~0 1)) [2019-11-06 21:22:54,347 INFO L443 ceAbstractionStarter]: For program point L17-3(lines 17 19) no Hoare annotation was computed. [2019-11-06 21:22:54,348 INFO L439 ceAbstractionStarter]: At program point L15-2(lines 15 24) the Hoare annotation is: (= main_~k~0 4) [2019-11-06 21:22:54,348 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 27) no Hoare annotation was computed. [2019-11-06 21:22:54,348 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 27) the Hoare annotation is: true [2019-11-06 21:22:54,348 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-11-06 21:22:54,348 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-11-06 21:22:54,349 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-06 21:22:54,349 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-06 21:22:54,349 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-06 21:22:54,349 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-11-06 21:22:54,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:22:54 BoogieIcfgContainer [2019-11-06 21:22:54,372 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-06 21:22:54,378 INFO L168 Benchmark]: Toolchain (without parser) took 2223.31 ms. Allocated memory was 138.9 MB in the beginning and 199.8 MB in the end (delta: 60.8 MB). Free memory was 102.3 MB in the beginning and 90.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 72.9 MB. Max. memory is 7.1 GB. [2019-11-06 21:22:54,380 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-06 21:22:54,383 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.40 ms. Allocated memory is still 138.9 MB. Free memory was 101.8 MB in the beginning and 92.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-11-06 21:22:54,389 INFO L168 Benchmark]: Boogie Preprocessor took 121.22 ms. Allocated memory was 138.9 MB in the beginning and 199.8 MB in the end (delta: 60.8 MB). Free memory was 92.8 MB in the beginning and 178.1 MB in the end (delta: -85.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2019-11-06 21:22:54,390 INFO L168 Benchmark]: RCFGBuilder took 220.91 ms. Allocated memory is still 199.8 MB. Free memory was 178.1 MB in the beginning and 166.9 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-11-06 21:22:54,391 INFO L168 Benchmark]: TraceAbstraction took 1607.48 ms. Allocated memory is still 199.8 MB. Free memory was 166.9 MB in the beginning and 90.2 MB in the end (delta: 76.7 MB). Peak memory consumption was 76.7 MB. Max. memory is 7.1 GB. [2019-11-06 21:22:54,403 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 268.40 ms. Allocated memory is still 138.9 MB. Free memory was 101.8 MB in the beginning and 92.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.22 ms. Allocated memory was 138.9 MB in the beginning and 199.8 MB in the end (delta: 60.8 MB). Free memory was 92.8 MB in the beginning and 178.1 MB in the end (delta: -85.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 220.91 ms. Allocated memory is still 199.8 MB. Free memory was 178.1 MB in the beginning and 166.9 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1607.48 ms. Allocated memory is still 199.8 MB. Free memory was 166.9 MB in the beginning and 90.2 MB in the end (delta: 76.7 MB). Peak memory consumption was 76.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: k == 4 || (j + 100 <= i && i <= 0) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: k == 4 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: k == 4 || i <= 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Result: SAFE, OverallTime: 1.4s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 96 SDtfs, 5 SDslu, 133 SDs, 0 SdLazy, 38 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 15 PreInvPairs, 25 NumberOfFragments, 31 HoareAnnotationTreeSize, 15 FomulaSimplifications, 44 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 122 NumberOfCodeBlocks, 122 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 2994 SizeOfPredicates, 3 NumberOfNonLiveVariables, 79 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 27/32 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...