/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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:39:40,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:39:40,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:39:40,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:39:40,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:39:40,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:39:40,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:39:40,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:39:40,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:39:40,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:39:40,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:39:40,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:39:40,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:39:40,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:39:40,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:39:40,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:39:40,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:39:40,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:39:40,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:39:40,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:39:40,622 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 [2019-11-07 01:39:40,636 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:39:40,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:39:40,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:39:40,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:39:40,638 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:39:40,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:39:40,638 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:39:40,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:39:40,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:39:40,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:39:40,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:39:40,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:39:40,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:39:40,639 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:39:40,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:39:40,640 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:39:40,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:39:40,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:39:40,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:39:40,641 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:39:40,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:39:40,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:39:40,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:39:40,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:39:40,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:39:40,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:39:40,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:39:40,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:39:40,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:39:40,918 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:39:40,935 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:39:40,938 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:39:40,940 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:39:40,940 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:39:40,941 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label40.c [2019-11-07 01:39:41,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/599ce69e2/1757902d215b4006b18c506926e7cd0e/FLAGbec4a64e4 [2019-11-07 01:39:41,536 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:39:41,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label40.c [2019-11-07 01:39:41,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/599ce69e2/1757902d215b4006b18c506926e7cd0e/FLAGbec4a64e4 [2019-11-07 01:39:41,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/599ce69e2/1757902d215b4006b18c506926e7cd0e [2019-11-07 01:39:41,867 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:39:41,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:39:41,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:39:41,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:39:41,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:39:41,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:41" (1/1) ... [2019-11-07 01:39:41,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@389c572b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:41, skipping insertion in model container [2019-11-07 01:39:41,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:41" (1/1) ... [2019-11-07 01:39:41,909 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:39:42,020 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:39:42,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:39:42,552 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:39:42,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:39:42,717 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:39:42,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:42 WrapperNode [2019-11-07 01:39:42,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:39:42,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:39:42,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:39:42,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:39:42,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:42" (1/1) ... [2019-11-07 01:39:42,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:42" (1/1) ... [2019-11-07 01:39:42,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:42" (1/1) ... [2019-11-07 01:39:42,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:42" (1/1) ... [2019-11-07 01:39:42,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:42" (1/1) ... [2019-11-07 01:39:42,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:42" (1/1) ... [2019-11-07 01:39:42,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:42" (1/1) ... [2019-11-07 01:39:42,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:39:42,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:39:42,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:39:42,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:39:42,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:42" (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 [2019-11-07 01:39:42,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:39:42,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:39:42,882 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:39:42,882 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:39:42,882 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:39:42,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:39:42,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:39:42,883 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:39:42,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:39:42,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:39:42,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:39:45,002 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:39:45,003 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:39:45,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:45 BoogieIcfgContainer [2019-11-07 01:39:45,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:39:45,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:39:45,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:39:45,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:39:45,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:39:41" (1/3) ... [2019-11-07 01:39:45,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131c072d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:45, skipping insertion in model container [2019-11-07 01:39:45,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:42" (2/3) ... [2019-11-07 01:39:45,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131c072d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:45, skipping insertion in model container [2019-11-07 01:39:45,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:45" (3/3) ... [2019-11-07 01:39:45,013 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label40.c [2019-11-07 01:39:45,023 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:39:45,031 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:39:45,043 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:39:45,071 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:39:45,071 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:39:45,071 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:39:45,072 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:39:45,072 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:39:45,072 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:39:45,073 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:39:45,073 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:39:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:39:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:39:45,134 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:45,135 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:39:45,139 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:45,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:45,147 INFO L82 PathProgramCache]: Analyzing trace with hash -219368393, now seen corresponding path program 1 times [2019-11-07 01:39:45,158 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:45,158 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610881797] [2019-11-07 01:39:45,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:45,725 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610881797] [2019-11-07 01:39:45,726 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:39:45,726 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:39:45,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94121076] [2019-11-07 01:39:45,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:39:45,737 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:39:45,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:39:45,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:39:45,754 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 4 states. [2019-11-07 01:39:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:39:46,588 INFO L93 Difference]: Finished difference Result 361 states and 678 transitions. [2019-11-07 01:39:46,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:39:46,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2019-11-07 01:39:46,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:39:46,607 INFO L225 Difference]: With dead ends: 361 [2019-11-07 01:39:46,607 INFO L226 Difference]: Without dead ends: 259 [2019-11-07 01:39:46,611 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:39:46,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-11-07 01:39:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 175. [2019-11-07 01:39:46,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:39:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-11-07 01:39:46,677 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-11-07 01:39:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:39:46,679 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-11-07 01:39:46,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:39:46,679 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-11-07 01:39:46,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 01:39:46,684 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:46,685 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:39:46,685 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:46,686 INFO L82 PathProgramCache]: Analyzing trace with hash -701903172, now seen corresponding path program 1 times [2019-11-07 01:39:46,686 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:46,686 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388223585] [2019-11-07 01:39:46,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:46,818 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388223585] [2019-11-07 01:39:46,818 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:39:46,818 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:39:46,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744829759] [2019-11-07 01:39:46,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:39:46,820 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:39:46,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:39:46,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:39:46,821 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 4 states. [2019-11-07 01:39:47,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:39:47,648 INFO L93 Difference]: Finished difference Result 681 states and 1261 transitions. [2019-11-07 01:39:47,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:39:47,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-11-07 01:39:47,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:39:47,656 INFO L225 Difference]: With dead ends: 681 [2019-11-07 01:39:47,656 INFO L226 Difference]: Without dead ends: 511 [2019-11-07 01:39:47,660 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:39:47,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2019-11-07 01:39:47,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2019-11-07 01:39:47,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2019-11-07 01:39:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 846 transitions. [2019-11-07 01:39:47,715 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 846 transitions. Word has length 94 [2019-11-07 01:39:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:39:47,716 INFO L462 AbstractCegarLoop]: Abstraction has 511 states and 846 transitions. [2019-11-07 01:39:47,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:39:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 846 transitions. [2019-11-07 01:39:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-07 01:39:47,724 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:47,724 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:39:47,725 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1241894341, now seen corresponding path program 1 times [2019-11-07 01:39:47,725 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:47,726 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179687996] [2019-11-07 01:39:47,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:39:47,805 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179687996] [2019-11-07 01:39:47,805 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20014270] [2019-11-07 01:39:47,805 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 [2019-11-07 01:39:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:47,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:39:47,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:39:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:48,007 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:39:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:48,114 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1052054481] [2019-11-07 01:39:48,164 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:39:48,164 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:39:48,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:39:48,179 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:39:48,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:39:48,369 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:39:49,599 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-11-07 01:39:51,944 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2019-11-07 01:39:57,057 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-11-07 01:39:57,291 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-11-07 01:39:57,514 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-11-07 01:40:02,010 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:40:02,014 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:40:02,438 WARN L191 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2019-11-07 01:40:02,802 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2019-11-07 01:40:03,643 WARN L191 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 98 [2019-11-07 01:40:04,710 WARN L191 SmtUtils]: Spent 985.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 101 [2019-11-07 01:40:05,009 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-11-07 01:40:05,244 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-11-07 01:40:05,505 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-11-07 01:40:05,865 WARN L191 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2019-11-07 01:40:06,245 WARN L191 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 80 [2019-11-07 01:40:06,612 WARN L191 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2019-11-07 01:40:07,016 WARN L191 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2019-11-07 01:40:13,585 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:40:13,586 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 13] total 23 [2019-11-07 01:40:13,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308230240] [2019-11-07 01:40:13,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:40:13,589 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:13,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:40:13,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:40:13,590 INFO L87 Difference]: Start difference. First operand 511 states and 846 transitions. Second operand 23 states. [2019-11-07 01:40:13,773 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:40:14,325 WARN L191 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 109 [2019-11-07 01:40:14,968 WARN L191 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 115 [2019-11-07 01:40:15,690 WARN L191 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 112 [2019-11-07 01:40:16,035 WARN L191 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2019-11-07 01:40:16,394 WARN L191 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 93 [2019-11-07 01:40:16,706 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2019-11-07 01:40:16,965 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2019-11-07 01:40:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:20,155 INFO L93 Difference]: Finished difference Result 1235 states and 2161 transitions. [2019-11-07 01:40:20,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-07 01:40:20,156 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 104 [2019-11-07 01:40:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:20,162 INFO L225 Difference]: With dead ends: 1235 [2019-11-07 01:40:20,162 INFO L226 Difference]: Without dead ends: 729 [2019-11-07 01:40:20,166 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 229 SyntacticMatches, 75 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2019-11-07 01:40:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2019-11-07 01:40:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 698. [2019-11-07 01:40:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2019-11-07 01:40:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1024 transitions. [2019-11-07 01:40:20,225 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1024 transitions. Word has length 104 [2019-11-07 01:40:20,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:20,226 INFO L462 AbstractCegarLoop]: Abstraction has 698 states and 1024 transitions. [2019-11-07 01:40:20,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:40:20,226 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1024 transitions. [2019-11-07 01:40:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-07 01:40:20,231 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:20,231 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:40:20,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:40:20,438 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:20,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:20,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1792232590, now seen corresponding path program 1 times [2019-11-07 01:40:20,439 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:20,439 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593072152] [2019-11-07 01:40:20,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:20,639 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593072152] [2019-11-07 01:40:20,639 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701155527] [2019-11-07 01:40:20,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:40:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:20,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:40:20,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:40:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:40:20,809 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:40:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:40:20,850 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:40:20,851 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-07 01:40:20,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694203339] [2019-11-07 01:40:20,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:40:20,852 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:20,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:40:20,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:40:20,853 INFO L87 Difference]: Start difference. First operand 698 states and 1024 transitions. Second operand 3 states. [2019-11-07 01:40:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:21,205 INFO L93 Difference]: Finished difference Result 1556 states and 2434 transitions. [2019-11-07 01:40:21,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:40:21,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-11-07 01:40:21,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:21,216 INFO L225 Difference]: With dead ends: 1556 [2019-11-07 01:40:21,216 INFO L226 Difference]: Without dead ends: 694 [2019-11-07 01:40:21,219 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:40:21,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2019-11-07 01:40:21,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 694. [2019-11-07 01:40:21,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2019-11-07 01:40:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 974 transitions. [2019-11-07 01:40:21,260 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 974 transitions. Word has length 121 [2019-11-07 01:40:21,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:21,260 INFO L462 AbstractCegarLoop]: Abstraction has 694 states and 974 transitions. [2019-11-07 01:40:21,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:40:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 974 transitions. [2019-11-07 01:40:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 01:40:21,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:21,268 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:40:21,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:40:21,482 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:21,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:21,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1303019596, now seen corresponding path program 1 times [2019-11-07 01:40:21,482 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:21,483 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32184253] [2019-11-07 01:40:21,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:21,688 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32184253] [2019-11-07 01:40:21,689 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221150413] [2019-11-07 01:40:21,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-07 01:40:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:21,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:40:21,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:40:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:21,868 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:40:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:21,935 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035091464] [2019-11-07 01:40:21,942 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:40:21,942 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:40:21,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:40:21,943 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:40:21,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:40:22,008 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:40:22,574 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 83 for LOIs