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/Problem01_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:40:54,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:40:54,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:40:54,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:40:54,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:40:54,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:40:54,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:40:54,768 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 [2019-10-15 01:40:54,789 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:40:54,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:40:54,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:40:54,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:40:54,792 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:40:54,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:40:54,792 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:40:54,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:40:54,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:40:54,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:40:54,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:40:54,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:40:54,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:40:54,795 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:40:54,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:40:54,795 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:40:54,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:40:54,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:40:54,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:40:54,796 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:40:54,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:40:54,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:40:54,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:40:54,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:40:54,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:40:54,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:40:54,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:40:54,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:40:54,798 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 [2019-10-15 01:40:55,092 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:40:55,105 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:40:55,109 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:40:55,110 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:40:55,111 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:40:55,112 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2019-10-15 01:40:55,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f461bb29/ab28266e77ba4d06b4731d2a314a371f/FLAG9ac143ebb [2019-10-15 01:40:55,721 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:40:55,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2019-10-15 01:40:55,737 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f461bb29/ab28266e77ba4d06b4731d2a314a371f/FLAG9ac143ebb [2019-10-15 01:40:55,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f461bb29/ab28266e77ba4d06b4731d2a314a371f [2019-10-15 01:40:56,003 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:40:56,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:40:56,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:40:56,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:40:56,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:40:56,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:40:55" (1/1) ... [2019-10-15 01:40:56,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7de122ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:56, skipping insertion in model container [2019-10-15 01:40:56,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:40:55" (1/1) ... [2019-10-15 01:40:56,022 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:40:56,089 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:40:56,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:40:56,632 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:40:56,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:40:56,771 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:40:56,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:56 WrapperNode [2019-10-15 01:40:56,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:40:56,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:40:56,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:40:56,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:40:56,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:56" (1/1) ... [2019-10-15 01:40:56,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:56" (1/1) ... [2019-10-15 01:40:56,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:56" (1/1) ... [2019-10-15 01:40:56,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:56" (1/1) ... [2019-10-15 01:40:56,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:56" (1/1) ... [2019-10-15 01:40:56,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:56" (1/1) ... [2019-10-15 01:40:56,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:56" (1/1) ... [2019-10-15 01:40:56,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:40:56,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:40:56,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:40:56,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:40:56,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:56" (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 [2019-10-15 01:40:56,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:40:56,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:40:56,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:40:56,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:40:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:40:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:40:56,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:40:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:40:56,972 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:40:56,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:40:56,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:40:58,933 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:40:58,934 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:40:58,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:40:58 BoogieIcfgContainer [2019-10-15 01:40:58,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:40:58,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:40:58,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:40:58,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:40:58,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:40:55" (1/3) ... [2019-10-15 01:40:58,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d735a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:40:58, skipping insertion in model container [2019-10-15 01:40:58,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:56" (2/3) ... [2019-10-15 01:40:58,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d735a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:40:58, skipping insertion in model container [2019-10-15 01:40:58,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:40:58" (3/3) ... [2019-10-15 01:40:58,945 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label56.c [2019-10-15 01:40:58,955 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:40:58,963 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:40:58,975 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:40:59,001 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:40:59,002 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:40:59,002 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:40:59,002 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:40:59,003 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:40:59,003 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:40:59,003 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:40:59,003 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:40:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-10-15 01:40:59,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-15 01:40:59,050 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:40:59,051 INFO L380 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] [2019-10-15 01:40:59,053 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:40:59,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:40:59,059 INFO L82 PathProgramCache]: Analyzing trace with hash 826786313, now seen corresponding path program 1 times [2019-10-15 01:40:59,069 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:40:59,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975044111] [2019-10-15 01:40:59,069 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:59,070 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:59,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:40:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:40:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:40:59,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975044111] [2019-10-15 01:40:59,510 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:40:59,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:40:59,512 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409573028] [2019-10-15 01:40:59,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:40:59,519 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:40:59,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:40:59,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:40:59,536 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-10-15 01:41:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:00,170 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-10-15 01:41:00,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:00,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-10-15 01:41:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:00,195 INFO L225 Difference]: With dead ends: 246 [2019-10-15 01:41:00,195 INFO L226 Difference]: Without dead ends: 157 [2019-10-15 01:41:00,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:00,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-15 01:41:00,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-10-15 01:41:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-15 01:41:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 291 transitions. [2019-10-15 01:41:00,341 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 291 transitions. Word has length 77 [2019-10-15 01:41:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:00,342 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 291 transitions. [2019-10-15 01:41:00,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 291 transitions. [2019-10-15 01:41:00,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:41:00,351 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:00,351 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1] [2019-10-15 01:41:00,351 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:00,353 INFO L82 PathProgramCache]: Analyzing trace with hash 579761264, now seen corresponding path program 1 times [2019-10-15 01:41:00,353 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:00,353 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787278717] [2019-10-15 01:41:00,354 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:00,354 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:00,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:00,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787278717] [2019-10-15 01:41:00,565 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:00,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:00,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617636451] [2019-10-15 01:41:00,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:00,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:00,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:00,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:00,568 INFO L87 Difference]: Start difference. First operand 157 states and 291 transitions. Second operand 3 states. [2019-10-15 01:41:00,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:00,938 INFO L93 Difference]: Finished difference Result 459 states and 872 transitions. [2019-10-15 01:41:00,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:00,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:41:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:00,945 INFO L225 Difference]: With dead ends: 459 [2019-10-15 01:41:00,945 INFO L226 Difference]: Without dead ends: 307 [2019-10-15 01:41:00,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:00,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2019-10-15 01:41:00,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 232. [2019-10-15 01:41:00,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-10-15 01:41:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 412 transitions. [2019-10-15 01:41:01,002 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 412 transitions. Word has length 94 [2019-10-15 01:41:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:01,003 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 412 transitions. [2019-10-15 01:41:01,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 412 transitions. [2019-10-15 01:41:01,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-15 01:41:01,009 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:01,012 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1] [2019-10-15 01:41:01,012 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:01,012 INFO L82 PathProgramCache]: Analyzing trace with hash -164929604, now seen corresponding path program 1 times [2019-10-15 01:41:01,013 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:01,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196328862] [2019-10-15 01:41:01,013 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:01,013 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:01,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:01,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196328862] [2019-10-15 01:41:01,245 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:01,245 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:41:01,245 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804837123] [2019-10-15 01:41:01,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:41:01,247 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:01,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:41:01,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:41:01,253 INFO L87 Difference]: Start difference. First operand 232 states and 412 transitions. Second operand 6 states. [2019-10-15 01:41:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:01,766 INFO L93 Difference]: Finished difference Result 635 states and 1150 transitions. [2019-10-15 01:41:01,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:41:01,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2019-10-15 01:41:01,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:01,771 INFO L225 Difference]: With dead ends: 635 [2019-10-15 01:41:01,771 INFO L226 Difference]: Without dead ends: 408 [2019-10-15 01:41:01,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:41:01,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2019-10-15 01:41:01,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 398. [2019-10-15 01:41:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2019-10-15 01:41:01,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 649 transitions. [2019-10-15 01:41:01,806 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 649 transitions. Word has length 120 [2019-10-15 01:41:01,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:01,806 INFO L462 AbstractCegarLoop]: Abstraction has 398 states and 649 transitions. [2019-10-15 01:41:01,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:41:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 649 transitions. [2019-10-15 01:41:01,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 01:41:01,811 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:01,811 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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, 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] [2019-10-15 01:41:01,811 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:01,812 INFO L82 PathProgramCache]: Analyzing trace with hash 901496809, now seen corresponding path program 1 times [2019-10-15 01:41:01,812 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:01,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495416081] [2019-10-15 01:41:01,812 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:01,812 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:01,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:01,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495416081] [2019-10-15 01:41:01,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039540411] [2019-10-15 01:41:01,994 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 [2019-10-15 01:41:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:02,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:02,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:02,231 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:02,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68319847] [2019-10-15 01:41:02,384 INFO L162 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-10-15 01:41:02,384 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:02,390 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:02,397 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:02,398 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:02,770 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 100 for LOIs [2019-10-15 01:41:04,165 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 189 [2019-10-15 01:41:05,300 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 140 for LOIs [2019-10-15 01:41:06,167 WARN L191 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2019-10-15 01:41:06,380 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2019-10-15 01:41:06,571 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2019-10-15 01:41:07,072 WARN L191 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2019-10-15 01:41:07,363 WARN L191 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2019-10-15 01:41:07,623 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2019-10-15 01:41:08,368 WARN L191 SmtUtils]: Spent 556.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-10-15 01:41:08,859 WARN L191 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-10-15 01:41:09,563 WARN L191 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-10-15 01:41:10,028 WARN L191 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-10-15 01:41:10,486 WARN L191 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2019-10-15 01:41:11,469 WARN L191 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:12,022 WARN L191 SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:12,629 WARN L191 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2019-10-15 01:41:15,517 WARN L191 SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:16,049 WARN L191 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:16,612 WARN L191 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2019-10-15 01:41:17,437 WARN L191 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:17,966 WARN L191 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:18,529 WARN L191 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2019-10-15 01:41:19,329 WARN L191 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:19,860 WARN L191 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:20,442 WARN L191 SmtUtils]: Spent 579.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2019-10-15 01:41:22,806 WARN L191 SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:23,335 WARN L191 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:23,877 WARN L191 SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2019-10-15 01:41:24,607 WARN L191 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:25,144 WARN L191 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:25,722 WARN L191 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2019-10-15 01:41:27,896 WARN L191 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:28,419 WARN L191 SmtUtils]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:28,971 WARN L191 SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2019-10-15 01:41:29,839 WARN L191 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:30,371 WARN L191 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:30,933 WARN L191 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2019-10-15 01:41:32,016 WARN L191 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:32,550 WARN L191 SmtUtils]: Spent 532.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:33,096 WARN L191 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2019-10-15 01:41:33,831 WARN L191 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:34,370 WARN L191 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-15 01:41:34,928 WARN L191 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2019-10-15 01:41:35,715 WARN L191 SmtUtils]: Spent 582.00 ms on a formula simplification that was a NOOP. DAG size: 211