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/loops/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:16:36,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:36,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:36,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:36,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:36,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:36,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:36,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:36,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:36,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:36,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:36,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:36,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:36,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:36,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:36,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:36,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:36,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:36,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:36,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:36,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:36,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:36,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:36,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:36,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:16:36,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:16:36,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:16:36,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:16:36,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:16:36,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:16:36,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:16:36,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:16:36,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:16:36,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:36,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:36,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:36,783 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 [2019-10-14 23:16:36,818 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:36,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:36,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:36,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:36,820 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:36,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:36,821 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:36,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:36,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:36,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:36,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:36,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:36,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:36,822 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:36,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:36,825 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:36,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:36,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:36,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:36,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:36,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:36,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:36,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:36,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:36,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:36,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:36,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:36,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:36,828 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:37,112 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:37,129 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:37,133 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:37,134 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:37,135 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:37,135 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2019-10-14 23:16:37,216 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d12513f6c/1fa6e62a57eb4723a5b57b5dfc5eecd5/FLAG936f3e84a [2019-10-14 23:16:37,701 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:37,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c [2019-10-14 23:16:37,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d12513f6c/1fa6e62a57eb4723a5b57b5dfc5eecd5/FLAG936f3e84a [2019-10-14 23:16:38,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d12513f6c/1fa6e62a57eb4723a5b57b5dfc5eecd5 [2019-10-14 23:16:38,080 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:38,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:38,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:38,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:38,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:38,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f916025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38, skipping insertion in model container [2019-10-14 23:16:38,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,102 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:38,118 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:38,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:38,313 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:38,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:38,339 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:38,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38 WrapperNode [2019-10-14 23:16:38,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:38,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:38,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:38,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:38,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:38,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:38,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:38,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:38,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (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 [2019-10-14 23:16:38,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:38,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:38,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:16:38,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:38,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:38,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:16:38,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-14 23:16:38,516 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:38,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:38,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:38,696 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:38,696 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:16:38,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:38 BoogieIcfgContainer [2019-10-14 23:16:38,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:38,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:38,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:38,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:38,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:38" (1/3) ... [2019-10-14 23:16:38,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695ee69d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:38, skipping insertion in model container [2019-10-14 23:16:38,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (2/3) ... [2019-10-14 23:16:38,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695ee69d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:38, skipping insertion in model container [2019-10-14 23:16:38,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:38" (3/3) ... [2019-10-14 23:16:38,706 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c11.c [2019-10-14 23:16:38,715 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:38,722 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:38,732 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:38,756 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:38,757 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:38,757 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:38,757 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:38,757 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:38,757 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:38,758 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:38,758 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:38,775 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-14 23:16:38,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:16:38,780 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:38,781 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:38,783 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:38,788 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2019-10-14 23:16:38,796 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:38,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697144382] [2019-10-14 23:16:38,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:38,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:38,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:38,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697144382] [2019-10-14 23:16:38,890 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:38,890 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:16:38,890 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443075227] [2019-10-14 23:16:38,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:16:38,894 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:38,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:16:38,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:16:38,907 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-14 23:16:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:38,930 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-10-14 23:16:38,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:16:38,932 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:16:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:38,940 INFO L225 Difference]: With dead ends: 32 [2019-10-14 23:16:38,940 INFO L226 Difference]: Without dead ends: 13 [2019-10-14 23:16:38,943 INFO L600 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 [2019-10-14 23:16:38,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-14 23:16:38,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-14 23:16:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-14 23:16:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-10-14 23:16:38,976 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-10-14 23:16:38,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:38,976 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-10-14 23:16:38,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:16:38,977 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-10-14 23:16:38,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:16:38,977 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:38,978 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:38,978 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:38,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:38,979 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2019-10-14 23:16:38,979 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:38,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897135537] [2019-10-14 23:16:38,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:38,980 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:38,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:39,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897135537] [2019-10-14 23:16:39,148 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:39,148 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:16:39,148 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029260459] [2019-10-14 23:16:39,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:16:39,154 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:16:39,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:39,155 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-10-14 23:16:39,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:39,250 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-10-14 23:16:39,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:39,251 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:16:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:39,252 INFO L225 Difference]: With dead ends: 27 [2019-10-14 23:16:39,252 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:16:39,253 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:16:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-10-14 23:16:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-14 23:16:39,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-10-14 23:16:39,259 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-10-14 23:16:39,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:39,259 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-10-14 23:16:39,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:16:39,259 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-10-14 23:16:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 23:16:39,260 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:39,260 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:39,261 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:39,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1776138601, now seen corresponding path program 1 times [2019-10-14 23:16:39,261 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:39,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717631316] [2019-10-14 23:16:39,262 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:39,262 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:39,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:39,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717631316] [2019-10-14 23:16:39,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721889870] [2019-10-14 23:16:39,399 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 [2019-10-14 23:16:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:39,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:16:39,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:39,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:39,537 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:39,538 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-10-14 23:16:39,538 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035226594] [2019-10-14 23:16:39,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:16:39,539 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:39,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:16:39,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:16:39,540 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2019-10-14 23:16:39,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:39,603 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-14 23:16:39,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:16:39,603 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-10-14 23:16:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:39,604 INFO L225 Difference]: With dead ends: 30 [2019-10-14 23:16:39,605 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 23:16:39,605 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 23:16:39,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-10-14 23:16:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-14 23:16:39,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-14 23:16:39,610 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-10-14 23:16:39,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:39,611 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-14 23:16:39,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:16:39,611 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-14 23:16:39,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:16:39,612 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:39,612 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:39,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:39,816 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:39,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:39,816 INFO L82 PathProgramCache]: Analyzing trace with hash 199799702, now seen corresponding path program 2 times [2019-10-14 23:16:39,817 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:39,817 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676247132] [2019-10-14 23:16:39,818 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:39,818 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:39,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:39,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676247132] [2019-10-14 23:16:39,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060594808] [2019-10-14 23:16:39,946 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 [2019-10-14 23:16:39,974 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:39,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:39,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:16:39,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:40,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:40,032 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:40,032 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-10-14 23:16:40,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849233891] [2019-10-14 23:16:40,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:16:40,034 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:40,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:16:40,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:40,034 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2019-10-14 23:16:40,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:40,141 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-10-14 23:16:40,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:16:40,141 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-10-14 23:16:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:40,142 INFO L225 Difference]: With dead ends: 36 [2019-10-14 23:16:40,143 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:16:40,143 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:16:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:16:40,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-10-14 23:16:40,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 23:16:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-14 23:16:40,148 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2019-10-14 23:16:40,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:40,149 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-14 23:16:40,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:16:40,149 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-14 23:16:40,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 23:16:40,150 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:40,150 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:40,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:40,353 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:40,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1443974601, now seen corresponding path program 3 times [2019-10-14 23:16:40,355 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:40,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788464816] [2019-10-14 23:16:40,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:40,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:40,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:40,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788464816] [2019-10-14 23:16:40,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918702893] [2019-10-14 23:16:40,501 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 [2019-10-14 23:16:40,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:16:40,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:40,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:16:40,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:40,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:40,623 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:40,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2019-10-14 23:16:40,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330590827] [2019-10-14 23:16:40,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:16:40,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:40,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:16:40,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:16:40,625 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2019-10-14 23:16:40,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:40,734 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-10-14 23:16:40,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:16:40,735 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-10-14 23:16:40,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:40,736 INFO L225 Difference]: With dead ends: 42 [2019-10-14 23:16:40,736 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 23:16:40,737 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:16:40,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 23:16:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-14 23:16:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 23:16:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-14 23:16:40,742 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2019-10-14 23:16:40,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:40,743 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-14 23:16:40,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:16:40,743 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-14 23:16:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:16:40,744 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:40,744 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:40,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:40,948 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:40,949 INFO L82 PathProgramCache]: Analyzing trace with hash 92873718, now seen corresponding path program 4 times [2019-10-14 23:16:40,949 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:40,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671470229] [2019-10-14 23:16:40,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:40,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:40,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:41,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671470229] [2019-10-14 23:16:41,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942828846] [2019-10-14 23:16:41,129 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 [2019-10-14 23:16:41,166 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:41,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:41,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:16:41,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:41,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:41,232 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:41,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2019-10-14 23:16:41,232 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234688237] [2019-10-14 23:16:41,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:16:41,233 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:41,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:16:41,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:16:41,234 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2019-10-14 23:16:41,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:41,344 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-10-14 23:16:41,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:16:41,345 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-10-14 23:16:41,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:41,346 INFO L225 Difference]: With dead ends: 39 [2019-10-14 23:16:41,346 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:16:41,347 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:16:41,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:16:41,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:16:41,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:16:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:16:41,348 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2019-10-14 23:16:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:41,348 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:16:41,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:16:41,349 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:16:41,349 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:16:41,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:41,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:16:41,679 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-14 23:16:41,679 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:16:41,679 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:16:41,679 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:16:41,680 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:16:41,680 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:16:41,680 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 12 32) the Hoare annotation is: true [2019-10-14 23:16:41,680 INFO L443 ceAbstractionStarter]: For program point L28(line 28) no Hoare annotation was computed. [2019-10-14 23:16:41,680 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 12 32) no Hoare annotation was computed. [2019-10-14 23:16:41,680 INFO L443 ceAbstractionStarter]: For program point L21(lines 21 22) no Hoare annotation was computed. [2019-10-14 23:16:41,681 INFO L443 ceAbstractionStarter]: For program point L21-2(lines 21 22) no Hoare annotation was computed. [2019-10-14 23:16:41,681 INFO L439 ceAbstractionStarter]: At program point L19-2(lines 19 27) the Hoare annotation is: (or (and (<= main_~len~0 0) (< 0 (+ (div main_~len~0 4294967296) 1))) (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= 1 main_~len~0) (<= main_~len~0 1)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2019-10-14 23:16:41,683 INFO L439 ceAbstractionStarter]: At program point L19-3(lines 19 27) the Hoare annotation is: (or (and (<= main_~len~0 0) (< 0 (+ (div main_~len~0 4294967296) 1))) (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= 1 main_~len~0) (<= main_~len~0 1)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2019-10-14 23:16:41,683 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 12 32) no Hoare annotation was computed. [2019-10-14 23:16:41,683 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-14 23:16:41,683 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-14 23:16:41,684 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-14 23:16:41,684 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-14 23:16:41,684 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-14 23:16:41,684 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-14 23:16:41,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:16:41 BoogieIcfgContainer [2019-10-14 23:16:41,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:16:41,707 INFO L168 Benchmark]: Toolchain (without parser) took 3624.61 ms. Allocated memory was 146.8 MB in the beginning and 233.3 MB in the end (delta: 86.5 MB). Free memory was 104.5 MB in the beginning and 103.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 87.5 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:41,710 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 146.8 MB. Free memory was 123.2 MB in the beginning and 123.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-10-14 23:16:41,716 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.28 ms. Allocated memory is still 146.8 MB. Free memory was 104.3 MB in the beginning and 94.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:41,719 INFO L168 Benchmark]: Boogie Preprocessor took 111.00 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 94.5 MB in the beginning and 182.3 MB in the end (delta: -87.8 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:41,720 INFO L168 Benchmark]: RCFGBuilder took 245.87 ms. Allocated memory is still 204.5 MB. Free memory was 182.3 MB in the beginning and 171.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:41,721 INFO L168 Benchmark]: TraceAbstraction took 3005.73 ms. Allocated memory was 204.5 MB in the beginning and 233.3 MB in the end (delta: 28.8 MB). Free memory was 171.1 MB in the beginning and 103.5 MB in the end (delta: 67.6 MB). Peak memory consumption was 96.4 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:41,734 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 146.8 MB. Free memory was 123.2 MB in the beginning and 123.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.28 ms. Allocated memory is still 146.8 MB. Free memory was 104.3 MB in the beginning and 94.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.00 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 94.5 MB in the beginning and 182.3 MB in the end (delta: -87.8 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 245.87 ms. Allocated memory is still 204.5 MB. Free memory was 182.3 MB in the beginning and 171.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3005.73 ms. Allocated memory was 204.5 MB in the beginning and 233.3 MB in the end (delta: 28.8 MB). Free memory was 171.1 MB in the beginning and 103.5 MB in the end (delta: 67.6 MB). Peak memory consumption was 96.4 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: 19]: Loop Invariant Derived loop invariant: ((((len <= 0 && 0 < len / 4294967296 + 1) || (4 <= len && len <= 4)) || (len <= 2 && 2 <= len)) || (1 <= len && len <= 1)) || (len <= 3 && 3 <= len) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Result: SAFE, OverallTime: 2.9s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 83 SDtfs, 37 SDslu, 332 SDs, 0 SdLazy, 264 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 85 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 160 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 11916 SizeOfPredicates, 8 NumberOfNonLiveVariables, 142 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/80 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...