/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/Problem03_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:41:28,988 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:41:29,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:41:29,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:41:29,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:41:29,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:41:29,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:41:29,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:41:29,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:41:29,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:41:29,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:41:29,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:41:29,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:41:29,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:41:29,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:41:29,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:41:29,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:41:29,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:41:29,076 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 01:41:29,109 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:41:29,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:41:29,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:41:29,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:41:29,113 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:41:29,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:41:29,113 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:41:29,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:41:29,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:41:29,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:41:29,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:41:29,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:41:29,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:41:29,115 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:41:29,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:41:29,115 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:41:29,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:41:29,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:41:29,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:41:29,118 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:41:29,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:41:29,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:41:29,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:41:29,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:41:29,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:41:29,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:41:29,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:41:29,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:41:29,120 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 01:41:29,372 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:41:29,391 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:41:29,395 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:41:29,396 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:41:29,397 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:41:29,397 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label10.c [2019-11-07 01:41:29,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d094dd58/cd38469d9aec4006b1fe48c8e925d921/FLAG375583de0 [2019-11-07 01:41:30,152 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:41:30,153 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label10.c [2019-11-07 01:41:30,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d094dd58/cd38469d9aec4006b1fe48c8e925d921/FLAG375583de0 [2019-11-07 01:41:30,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d094dd58/cd38469d9aec4006b1fe48c8e925d921 [2019-11-07 01:41:30,336 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:41:30,338 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:41:30,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:41:30,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:41:30,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:41:30,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:30" (1/1) ... [2019-11-07 01:41:30,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4fc316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:30, skipping insertion in model container [2019-11-07 01:41:30,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:30" (1/1) ... [2019-11-07 01:41:30,354 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:41:30,435 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:41:31,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:41:31,237 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:41:31,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:41:31,607 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:41:31,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:31 WrapperNode [2019-11-07 01:41:31,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:41:31,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:41:31,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:41:31,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:41:31,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:31" (1/1) ... [2019-11-07 01:41:31,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:31" (1/1) ... [2019-11-07 01:41:31,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:31" (1/1) ... [2019-11-07 01:41:31,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:31" (1/1) ... [2019-11-07 01:41:31,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:31" (1/1) ... [2019-11-07 01:41:31,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:31" (1/1) ... [2019-11-07 01:41:31,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:31" (1/1) ... [2019-11-07 01:41:31,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:41:31,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:41:31,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:41:31,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:41:31,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:31" (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 01:41:31,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:41:31,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:41:31,842 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:41:31,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:41:31,842 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:41:31,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:41:31,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:41:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:41:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:41:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:41:31,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:41:35,001 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:41:35,002 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:41:35,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:35 BoogieIcfgContainer [2019-11-07 01:41:35,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:41:35,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:41:35,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:41:35,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:41:35,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:41:30" (1/3) ... [2019-11-07 01:41:35,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dec88a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:35, skipping insertion in model container [2019-11-07 01:41:35,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:31" (2/3) ... [2019-11-07 01:41:35,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dec88a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:35, skipping insertion in model container [2019-11-07 01:41:35,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:35" (3/3) ... [2019-11-07 01:41:35,022 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label10.c [2019-11-07 01:41:35,036 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:41:35,045 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:41:35,057 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:41:35,094 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:41:35,094 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:41:35,094 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:41:35,094 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:41:35,094 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:41:35,095 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:41:35,095 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:41:35,095 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:41:35,126 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-11-07 01:41:35,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-07 01:41:35,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:35,148 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:35,149 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:35,156 INFO L82 PathProgramCache]: Analyzing trace with hash 136473382, now seen corresponding path program 1 times [2019-11-07 01:41:35,164 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:35,164 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036272517] [2019-11-07 01:41:35,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:35,955 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 01:41:35,956 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036272517] [2019-11-07 01:41:35,957 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:35,957 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:41:35,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796523986] [2019-11-07 01:41:35,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:35,965 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:35,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:35,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:35,983 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 3 states. [2019-11-07 01:41:37,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:37,124 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2019-11-07 01:41:37,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:37,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-11-07 01:41:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:37,145 INFO L225 Difference]: With dead ends: 462 [2019-11-07 01:41:37,145 INFO L226 Difference]: Without dead ends: 301 [2019-11-07 01:41:37,150 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-11-07 01:41:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2019-11-07 01:41:37,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-11-07 01:41:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 564 transitions. [2019-11-07 01:41:37,222 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 564 transitions. Word has length 149 [2019-11-07 01:41:37,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:37,224 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 564 transitions. [2019-11-07 01:41:37,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:37,224 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 564 transitions. [2019-11-07 01:41:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-07 01:41:37,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:37,233 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:37,233 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:37,234 INFO L82 PathProgramCache]: Analyzing trace with hash 558843325, now seen corresponding path program 1 times [2019-11-07 01:41:37,234 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:37,234 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864461970] [2019-11-07 01:41:37,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:37,440 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864461970] [2019-11-07 01:41:37,440 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:37,440 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:41:37,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968785189] [2019-11-07 01:41:37,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:41:37,443 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:37,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:41:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:41:37,444 INFO L87 Difference]: Start difference. First operand 301 states and 564 transitions. Second operand 6 states. [2019-11-07 01:41:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:38,887 INFO L93 Difference]: Finished difference Result 929 states and 1794 transitions. [2019-11-07 01:41:38,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:41:38,888 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2019-11-07 01:41:38,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:38,897 INFO L225 Difference]: With dead ends: 929 [2019-11-07 01:41:38,897 INFO L226 Difference]: Without dead ends: 633 [2019-11-07 01:41:38,901 INFO L630 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 [2019-11-07 01:41:38,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-11-07 01:41:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 603. [2019-11-07 01:41:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-11-07 01:41:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1113 transitions. [2019-11-07 01:41:38,968 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1113 transitions. Word has length 158 [2019-11-07 01:41:38,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:38,969 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1113 transitions. [2019-11-07 01:41:38,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:41:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1113 transitions. [2019-11-07 01:41:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 01:41:38,975 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:38,976 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:38,976 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:38,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1532428526, now seen corresponding path program 1 times [2019-11-07 01:41:38,977 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:38,977 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979794518] [2019-11-07 01:41:38,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:39,248 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979794518] [2019-11-07 01:41:39,249 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:39,249 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:41:39,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874029115] [2019-11-07 01:41:39,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:39,251 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:39,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:39,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:39,253 INFO L87 Difference]: Start difference. First operand 603 states and 1113 transitions. Second operand 3 states. [2019-11-07 01:41:40,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:40,263 INFO L93 Difference]: Finished difference Result 1793 states and 3387 transitions. [2019-11-07 01:41:40,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:40,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-11-07 01:41:40,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:40,275 INFO L225 Difference]: With dead ends: 1793 [2019-11-07 01:41:40,275 INFO L226 Difference]: Without dead ends: 1195 [2019-11-07 01:41:40,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:40,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2019-11-07 01:41:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1195. [2019-11-07 01:41:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1195 states. [2019-11-07 01:41:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 2172 transitions. [2019-11-07 01:41:40,335 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 2172 transitions. Word has length 161 [2019-11-07 01:41:40,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:40,335 INFO L462 AbstractCegarLoop]: Abstraction has 1195 states and 2172 transitions. [2019-11-07 01:41:40,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:40,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 2172 transitions. [2019-11-07 01:41:40,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-07 01:41:40,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:40,347 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:40,347 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:40,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:40,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1729521215, now seen corresponding path program 1 times [2019-11-07 01:41:40,348 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:40,348 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201737550] [2019-11-07 01:41:40,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:40,505 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201737550] [2019-11-07 01:41:40,506 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249149225] [2019-11-07 01:41:40,506 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 01:41:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:40,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 01:41:40,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:41:40,900 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:41:40,991 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:41:40,991 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-07 01:41:40,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634477722] [2019-11-07 01:41:40,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:41:40,992 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:40,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:41:40,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:41:40,993 INFO L87 Difference]: Start difference. First operand 1195 states and 2172 transitions. Second operand 5 states. [2019-11-07 01:41:42,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:42,473 INFO L93 Difference]: Finished difference Result 3669 states and 7031 transitions. [2019-11-07 01:41:42,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:41:42,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2019-11-07 01:41:42,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:42,496 INFO L225 Difference]: With dead ends: 3669 [2019-11-07 01:41:42,496 INFO L226 Difference]: Without dead ends: 2479 [2019-11-07 01:41:42,501 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-07 01:41:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2019-11-07 01:41:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 2441. [2019-11-07 01:41:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2441 states. [2019-11-07 01:41:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 4497 transitions. [2019-11-07 01:41:42,624 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 4497 transitions. Word has length 178 [2019-11-07 01:41:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:42,625 INFO L462 AbstractCegarLoop]: Abstraction has 2441 states and 4497 transitions. [2019-11-07 01:41:42,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:41:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 4497 transitions. [2019-11-07 01:41:42,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-07 01:41:42,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:42,636 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:42,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:41:42,841 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:42,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:42,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1305476158, now seen corresponding path program 1 times [2019-11-07 01:41:42,842 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:42,842 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475840021] [2019-11-07 01:41:42,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:41:42,997 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475840021] [2019-11-07 01:41:42,997 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803785020] [2019-11-07 01:41:42,997 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 01:41:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:43,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:41:43,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:41:43,595 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:41:43,697 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:41:43,697 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-07 01:41:43,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856372765] [2019-11-07 01:41:43,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:41:43,700 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:43,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:41:43,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-11-07 01:41:43,700 INFO L87 Difference]: Start difference. First operand 2441 states and 4497 transitions. Second operand 5 states. [2019-11-07 01:41:44,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:44,932 INFO L93 Difference]: Finished difference Result 7465 states and 15186 transitions. [2019-11-07 01:41:44,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 01:41:44,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2019-11-07 01:41:44,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:44,968 INFO L225 Difference]: With dead ends: 7465 [2019-11-07 01:41:44,968 INFO L226 Difference]: Without dead ends: 5029 [2019-11-07 01:41:44,979 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 353 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-07 01:41:44,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2019-11-07 01:41:45,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 4943. [2019-11-07 01:41:45,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4943 states. [2019-11-07 01:41:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4943 states to 4943 states and 8925 transitions. [2019-11-07 01:41:45,169 INFO L78 Accepts]: Start accepts. Automaton has 4943 states and 8925 transitions. Word has length 179 [2019-11-07 01:41:45,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:45,170 INFO L462 AbstractCegarLoop]: Abstraction has 4943 states and 8925 transitions. [2019-11-07 01:41:45,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:41:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4943 states and 8925 transitions. [2019-11-07 01:41:45,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-07 01:41:45,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:45,188 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:45,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:41:45,393 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:45,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2106578894, now seen corresponding path program 1 times [2019-11-07 01:41:45,394 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:45,395 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777060345] [2019-11-07 01:41:45,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:45,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777060345] [2019-11-07 01:41:45,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484898296] [2019-11-07 01:41:45,637 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 01:41:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:45,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:41:45,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:45,972 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:46,052 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [677023974] [2019-11-07 01:41:46,090 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-11-07 01:41:46,091 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:41:46,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:41:46,104 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:41:46,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:41:46,519 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 208 for LOIs [2019-11-07 01:41:47,794 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 219 [2019-11-07 01:41:48,233 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 256 [2019-11-07 01:41:48,507 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2019-11-07 01:41:48,658 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2019-11-07 01:41:48,802 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2019-11-07 01:41:48,973 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 219 [2019-11-07 01:41:49,155 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 256 [2019-11-07 01:41:49,482 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2019-11-07 01:41:49,685 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 243 [2019-11-07 01:41:49,848 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 368 [2019-11-07 01:41:49,951 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2019-11-07 01:41:50,055 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2019-11-07 01:41:50,268 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 368 [2019-11-07 01:41:50,537 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 378 [2019-11-07 01:41:50,979 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 378 [2019-11-07 01:41:51,192 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 168 for LOIs [2019-11-07 01:41:51,467 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 111 [2019-11-07 01:41:51,874 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 117 [2019-11-07 01:41:52,010 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-11-07 01:41:52,559 WARN L191 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 136 [2019-11-07 01:41:52,803 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2019-11-07 01:41:53,795 WARN L191 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 142 [2019-11-07 01:41:54,030 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2019-11-07 01:41:54,639 WARN L191 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 142 [2019-11-07 01:41:55,048 WARN L191 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2019-11-07 01:41:57,912 WARN L191 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 361 DAG size of output: 189 [2019-11-07 01:41:58,513 WARN L191 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-11-07 01:42:00,960 WARN L191 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 521 DAG size of output: 189 [2019-11-07 01:42:01,638 WARN L191 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 189